Mpls Mpls VPN

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1 159

MPLS / MPLS_VPN

IP ............................................................................................................ 41. PVC ............................................................................................ 4

2IP ......................................................................................... 5

3. ......................................................................................................... 6

4.MPLS ....................................................................................... 7

MPLS ..................................................................................................................... 8MPLS ................................................................................................................ 10

MPLS ....................................................................................................................... 10

MPLS ................................................................................................................... 11

MPLS ................................................................................................................ 11

LSR ................................................................................................................... 13LSP ............................................................................................................ 13

FEC ........................................................................................................ 13

MPLS ......................................................................................................... 14

........................................................................................................................... 15

................................................................................................................. 161. ..................................................................................... 16

2. ....................................................................................................... 16

LDP ........................................................................................................... 17

................................................................................................................. 18

1. ................................................................................................... 192. ....................................................................................................... 19

3.LSP ......................................................................................................... 20

MPLS ................................................................................................................ 21

MPLS ................................................................................................................ 21

MPLS ................................................................................................................ 21MPLS TTL ................................................................................................................. 22

MPLS MTU ...................................................................................................................... 23

MPLSMRU ........................................................................................... 23

MTU ................................................................................................................. 24

........................................................................................................................ 24LDP ......................................................................................................................... 24

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2 159

MPLS ....................................................................................................................... 25

1. ....................................................................... 26

2.MTU ............................................................................. 263.CEF .................................................................................. 27

4.LDP ........................................................................................ 27

5.LDP .................................................................................................. 29

6.LDP ........................................................................................... 34

7. ......................................................................................... 438. ................................................................................................ 51

9. ............................................................................................ 57

10. ........................................................................................... 58

LDP .................................................................................................................. 61

LDP .................................................................................................................. 621. ....................................................................................................... 63

2. ................................................................................................ 64

3. ................................................................................................ 68

IGPLDP ................................................................................................................. 72

........................................................................................................................ 721.IGPLDP ............................................................................................. 73

2. .............................................................................................................. 74

3.Holddown ...................................................................................................... 75

4. ................................................................................................... 75

RD ......................................................................................................... 80VRF ........................................................................................................ 81

RT ............................................................................................................. 83

MP-BGP .......................................................................................................................... 86

MP-BGP ................................................................................................................... 87

PE-CE ............................................................................................................... 88 ................................................................................................................. 88

1. .............................................................................................................. 89

2.RIPv2 .................................................................................................................... 89

3.OSPF ..................................................................................................................... 90

4.EIGRP ................................................................................................................... 915.EBGP .................................................................................................................... 92

MPLS_VPN ............................................................................................................... 94

1.MPLS ............................................................................................................. 94

2.BGP ........................................................................................................ 96

3.PEVRF ..................................................................................................... 974.PECEVRF ................................................................................ 98

5.PEVRF ................................................................................ 98

6.MP-BGP ........................................................................................................101

7.MP-BGPVRF ........................................................................................102

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3 159

8.MP-BGPVRF ...............................................................................................103

9.RTVRF ......................................................................................103

10.PE-CE .........................................................................................10411.PEVRF ...........................................................................................106

12.MP-BGP .....................................................................................107

13.MP-BGP ...............................................................................................108

14.VRF ......................................................................................................109

15.CE ........................................................................................................11216. .............................................................................................114

17.PECE ....................................................................................................117

OSPF Sham-Link ..............................................................................................................119

OSPF Sham-Link ................................................................................................121

.......................................................................................................................1341.PELANVRF ...........................................................................................135

2.PE-CE ..............................................................................................136

3.EIGRPBGP ........................................................................................136

4.MP-BGPVRF .................................................................................137

5.RTVRF ......................................................................................1386.VRF .............................................................................................138

7.LAN .........................................................................................141

CE ................................................................................................................142

1.VRF ................................................................................................143

2.PE-CETunnel ...........................................................................................144PE-CE .......................................................................................................145

1.VRF ....................................................................................................145

2.PE-CEEBGP .............................................................................................147

Multi-VRF CE / VRF-Lite ...................................................................................................149

1.MPLS ...........................................................................................1502.MP-BGP ........................................................................................................151

3.CEVRF ...........................................................................151

4.VRF ...........................................................................152

5.PE-CEOSPF ..............................................................................................153

6.PEVRF ....................................................................................................1547.PEOSPF ..................................................................................................155

8.MP-BGPOSPF ...................................................................................155

9.CEVRF .........................................................................................156

10. ........................................................................................................158

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4 159

MPLS

IP

1. PVC

IP IP

IP

IP

IP IP

IP

Frame Relay

PVC IP PVC

PVC

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5 159

PVC

PVC

PVC

PVC PVC

PVC

PVC

PVC

PVC N

PVC

PVC

2 IP

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6 159

IP

IP

IP

3.

IPIP

PVC

PVC

PVC 1024

IP

10

10 IP

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7 159

IP

PVC

IP

4.MPLS

IP IP

IP

IP

IP

PVC

IP,

MPLS

IP

IP

MPLS

MPLS

MPLS

IP IP

MPLS

MPLS

MPLS

MPLS

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8 159

MPLS

1 IP

2MPLS

ASIC MPLS

MPLS

MPLSMPLS

IPv4,IPv6, HDLCPPP

MPLS MPLSAToM

MPLS BGP

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9 159

BGP IP

BGP

BGP IGP

BGP

IGP BGP

BGP

BGP BGP

MPLS BGP MPLS

BGP BGP

BGP

MPLS

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10 159

MPLS

Cisco IPtag switching

TFIB

IOSRSVP

MPLS

32 bit

20 0 2 20 1048575

16bit 21 23bit 3EXP

QOS

24 Bos 0 1

25 32 8 bit TTL

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11 159

MPLS

MPLS

BOS 1 0

MPLS VPN AToMMPLS VPN

MPLS IP

MPLS

MPLS

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12 159

MPLS LSR

3 LSR

LSR

LSR LSR

LSR IP MPLS

LSR

LSR

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13 159

LSR

LSR

LSR

LSR

LSR

MPLS VPN LSR PE LSR P

PE P MPLS VPN

LSP

LSP 20503568

LSP 20-50-35-68LSP LSR MPLS

MPLSLSPLSP

LSR LSR LSR LSR

FEC

FEC

FEC

FEC EXP FEC LSR FEC

LSP

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14 159

FEC FEC

FEC

FEC

MPLS

LSR

LSR

LSR

LSR LSR

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LSR

LSR

R4 24 R6

24 R4 LSR R4

24 R4 24

R3 LSR R3 24

24 R4

R3 23 23

R3 24 R4 R3 23 R2

R2 22 R2

22 23 R3 R2 22

R1 R1 R2 22 R2

R1 LSR IP

LSR

22 R2 R6 LSR

R4 R4 R6 IP

LSR MPLS

LSR

LSR

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16 159

LSR

LSR PVC

LSR

LSR

1 IP

2

1.

EIGRP

OSPF ISIS

IGP BGP

BGP

2.

LSR

TDP

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17 159

LDP

RSVP

TDP LDP

LDP IETF LDP TDP

RSVP MPLS TE

LDP

IP IGP LSR

LSR

LIB LDP

MPLS PVC

MPLS

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18 159

LSR LSR

EIGRP

MPLS LSR EIGRP

LIB EIGRP

IGP

LFIB

EIGRP

IOSLDP BGP IPv4

IGP

LDP TE RSVP MPLS VPN BGP

MPLS

, LSR

LSR

FEC

LSR

: IOS ATMLC-ATM

CCIE R&S

LSR

1

2

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19 159

3LSP

1.

1 DOD

2 UD

1 DOD LSR

LSR

2 UDLSR

UD LSR

DOD LSR LIB

UD

IOS LC-ATM UD

2.

LSR

1LLR

2CLR

1 LLR LSR LIB LFIB

LIB LIB

2 CLR LSR LFIB LIB

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20 159

IOS LC-ATM LLR LIB

3.LSP

LSR

1 LSP

2 LSP

1LSR LSR

2LSR FEC LSR

LSP LSP LSR

LSR

:IOS LSP FECATM

LSR 20bit LFIB

IP IP CEF

LFIB

CEF IP

CEF

CEF MPLS

CEF

10.1.1.0 CEF

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21 159

show ip cef 10.1.1.0

MPLS

IPv4 metric

LSR

MPLS VPN MPLS VPNP

IP

MPLS

LSR

IOS

MPLS

MPLS

0-150 null,3 1 14

OAM

3

MPLSP PE

MPLS IP MPLS PE

PE IP IP

IP PEPE

LFIB LFIB

IP IP

IP PE

IP LFIB

PE IP

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22 159

PE IP

PE IP

PE PE

PE

3 3 LSR

PHP LSR

outgoing pop

IOSPHP

3 3

IPv4 0IPv6 2

EXP QOS

0 0 LFIB EXP

QOS

1

20 bit 16-1048575,IOS 16-10 0000,IGP

BGP

MPLS TTL

TTL 0 ICMP 11

0() TTL IP

MPLS

IP MPLS IP TTL PE 1

TTL MPLSPE TTL

IP TTL 1 TTL IP TTL

1 P

TTL

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23 159

TTL 0 MPLS LSP

IPv4 IPv6

MPLS VPN TTL PE CE P

ICMP

MPLS MTU

OSI

MTU MTU

MTU

MPLS

MTU

MPLS MTU MPLS

MTU MPLS

4 MTU 8

MTU MPLS

MPLSMRU

sh mpls forwarding-table 1.1.1.1 detail

MPLS MTU IP LSR

IP IP

DFLSR ICMP

3 4 LSP

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24 159

MTU

MTU

ICMP

IGP

LDP BGP BGP

LDP BGP IPv4

LDP

LDP

1 LDP LSR

2

3

4

LDP OSPF helloLDP

hello hello UDP 646 224.0.0.2

hello 5 15 hello

hello LDP Link Hello

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LDP LSR LDP LDP

TCP

LDP sessionsLDP hello 60 180 LDP

LDP

MPLS

MPLSMPLS R1R2R3R4 R1

R4 MPLS IP MPLS

looback0

X.X.X.X/32,XR2 loopback02.2.2.2/32,R5

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26 159

loopback0 5.5.5.5/32 OSPF

loopback0 OSPF OSPF

1.

1:

R1#sh mpls label range

Downstream Generic label region: Min/Max label: 16/100000

R1#

16 100000

2

R1(config)#mpls label range 16 1010000

R1#sh mpls label range

Downstream Generic label region: Min/Max label: 16/1010000

R1#

:16 1010000

2. MTU

1 MTU:

R1#show mpls int s1/1 detail

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27 159

2 MTU:

R1(config)#int s1/1

R1 (config-if)#mpls mtu 1508

R1 (config)#int s1/1

R1 (config-if)#mtu 2000

: IOS MTU

3

swconfig#system jumbomtu 2000

sw(config)#system mtu 2000

3. CEF

IOS IOS

r1(config)#ip cef

4. LDP

1 LDP:

LDP LDP

r1(config)#mpls label protocol ldp

2 LDP:

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28 159

LDP

r1(config)#int s1/1

r1(config-if)# mpls label protocol ldp

3 hello:

r1(config)#int s1/1

r1(config-if)#mpls ip

mpls ip

IOS tag-switching mpls ip,

LDP MPLS LDP

hello LDP

R1

r1(config)#int s1/1

r1(config-if)# mpls label protocol ldp

r1(config-if)#mpls ip

R2

R2(config)#mpls label protocol ldp

R2(config)#int s1/0

R2(config-if)#mpls ip

R2(config-if)#exit

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29 159

R2(config)#int s1/1

R2(config-if)#mpls ip

R3

R3(config)#mpls label protocol ldp

R3(config)#int s1/0

R3(config-if)#mpls ip

R3(config-if)#exit

R3(config)#int s1/1

R3(config-if)#mpls ip

R4

R4(config)#int s1/1

R4(config-if)#mpls label protocol ldp

R4(config-if)#mpls ip

5. LDP

1 mpls

r1#sh mpls interfaces

Interface IP Tunnel Operational

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Serial1/1 Yes (ldp) No Yes

r1#

R1 S1/1 LDP

2 LDP hello

r1#sh mpls ldp parameters

Protocol version: 1

Downstream label generic region: min label: 16; max label: 100000

Session hold time: 180 sec; keep alive interval: 60 sec

Discovery hello: holdtime: 15 sec; interval: 5 sec

Discovery targeted hello: holdtime: 90 sec; interval: 10 sec

Downstream on Demand max hop count: 255

Downstream on Demand Path Vector Limit: 255

LDP for targeted sessions

LDP initial/maximum backoff: 15/120 sec

LDP loop detection: off

r1#

hello hold 5s 15s hello hold

60s 180s

3:

:

hello:

r1(config)#mpls ldp discovery hello interval 3

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r1(config)#exi

r1#sh mpls ldp parameters

Protocol version: 1

Downstream label generic region: min label: 16; max label: 100000

Session hold time: 180 sec; keep alive interval: 60 sec

Discovery hello: holdtime: 15 sec; interval: 3 sec

Discovery targeted hello: holdtime: 90 sec; interval: 10 sec

Downstream on Demand max hop count: 255

Downstream on Demand Path Vector Limit: 255

LDP for targeted sessions

LDP initial/maximum backoff: 15/120 sec

LDP loop detection: off

: hello 3s

r1#sh mpls ldp discovery detail

Local LDP Identifier:

12.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/1 (ldp): xmit/recv

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Enabled: Interface config

Hello interval: 3000 ms; Transport IP addr: 12.1.1.1

LDP Id: 2.2.2.2:0; no host route to transport addr

Src IP addr: 12.1.1.2; Transport IP addr: 12.1.1.2

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 12.1.1.0/24

r1#

: hello 3s

r1(config)#mpls ldp discovery hello interval 8

r1#sh mpls ldp parameters

Protocol version: 1

Downstream label generic region: min label: 16; max label: 100000

Session hold time: 180 sec; keep alive interval: 60 sec

Discovery hello: holdtime: 15 sec; interval: 8 sec

Discovery targeted hello: holdtime: 90 sec; interval: 10 sec

Downstream on Demand max hop count: 255

Downstream on Demand Path Vector Limit: 255

LDP for targeted sessions

LDP initial/maximum backoff: 15/120 sec

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LDP loop detection: off

r1#

: hello 8s

r1#sh mpls ldp discovery detail

Local LDP Identifier:

12.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 12.1.1.1

LDP Id: 2.2.2.2:0; no host route to transport addr

Src IP addr: 12.1.1.2; Transport IP addr: 12.1.1.2

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 12.1.1.0/24

r1#

: hello 5s

r1(config)#mpls ldp holdtime 150

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r1#sh adjacency detail

*Mar 1 01:32:03.063: %SYS-5-CONFIG_I: Configured from console by console

r1#sh mpls ldp parameters

Protocol version: 1

Downstream label generic region: min label: 16; max label: 100000

Session hold time: 150 sec; keep alive interval: 50 sec

Discovery hello: holdtime: 15 sec; interval: 8 sec

Discovery targeted hello: holdtime: 90 sec; interval: 10 sec

Downstream on Demand max hop count: 255

Downstream on Demand Path Vector Limit: 255

LDP for targeted sessions

LDP initial/maximum backoff: 15/120 sec

LDP loop detection: off

r1#

hold 150s

6. LDP

(1) R1 LDP discovery:

r1#sh mpls ldp discovery detail

Local LDP Identifier:

1.1.1.1:0

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35 159

Discovery Sources:

Interfaces:

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0; no route to transport addr

Src IP addr: 12.1.1.2; Transport IP addr: 2.2.2.2

Hold time: 15 sec; Proposed local/peer: 15/15 sec

r1#

:Local LDP Identifier LSR ID 6 4

Rotuer-ID loopback

OSPF Rotuer-ID 2

01.1.1.1:0 1.1.1.1

R1 Rotuer-ID 0 Transport IP

IP Rotuer-ID

Transport IP R1 R2

hello Transport IP 2.2.2.2 loopback0

OSPF R1no route to

transport addr

2 R2 LDP discovery:

r2#sh mpls ldp discovery detail

Local LDP Identifier:

2.2.2.2:0

Discovery Sources:

Interfaces:

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36 159

Serial1/0 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 2.2.2.2

LDP Id: 3.3.3.3:0; no route to transport addr

Src IP addr: 23.1.1.3; Transport IP addr: 3.3.3.3

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 2.2.2.2

LDP Id: 1.1.1.1:0; no route to transport addr

Src IP addr: 12.1.1.1; Transport IP addr: 1.1.1.1

Hold time: 15 sec; Proposed local/peer: 15/15 sec

r2#

:R2 Rotuer-ID 2.2.2.2 Transport IP R1

Transport IP 1.1.1.1

LDP

(3)

: Transport IP Transport IP

Rotuer-ID IP Rotuer-ID Transport

IP

R1Router-Id S1/1

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37 159

r1(config)#mpls ldp router-id serial 1/1 force force

r1(config)#exi

r1#sh mpls ldp discovery detail

Local LDP Identifier:

12.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 12.1.1.1

LDP Id: 2.2.2.2:0; no route to transport addr

Src IP addr: 12.1.1.2; Transport IP addr: 2.2.2.2

Hold time: 15 sec; Proposed local/peer: 15/15 sec

r1#

: Rotuer-ID S1/1 12.1.1.1Transport IP

12.1.1.1

R1 Transport IP R2 R2 Transport IP

loopbackR1Transport IP Rotuer-ID

Transport IP R2

Transport IP S1/1Rotuer-ID

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38 159

r2#sh mpls ldp discovery detail

Local LDP Identifier:

2.2.2.2:0

Discovery Sources:

Interfaces:

Serial1/0 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 2.2.2.2

LDP Id: 3.3.3.3:0; no route to transport addr

Src IP addr: 23.1.1.3; Transport IP addr: 3.3.3.3

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 2.2.2.2

LDP Id: 12.1.1.1:0; no host route to transport addr

Src IP addr: 12.1.1.1; Transport IP addr: 12.1.1.1

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 12.1.1.0/24

r2#conf t

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39 159

r2(config)#int s1/1

r2(config-if)#mpls ldp discovery transport-address interface

r2(config-if)#exi

r2#sh mpls ldp discovery detail

Local LDP Identifier:

2.2.2.2:0

Discovery Sources:

Interfaces:

Serial1/0 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 2.2.2.2

LDP Id: 3.3.3.3:0; no route to transport addr

Src IP addr: 23.1.1.3; Transport IP addr: 3.3.3.3

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 12.1.1.2

LDP Id: 12.1.1.1:0; no host route to transport addr

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Src IP addr: 12.1.1.1; Transport IP addr: 12.1.1.1

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 12.1.1.0/24

r2#

:s1/1 Transport IP Router-ID

S1/0 Router-ID

R2 Transport IP

r2#cle mpls ldp neighbor *

r2#

r2#sh mpls ldp neighbor

Peer LDP Ident: 12.1.1.1:0; Local LDP Ident 2.2.2.2:0

TCP connection: 12.1.1.1.646 - 12.1.1.2.11155

State: Oper; Msgs sent/rcvd: 9/9; Downstream

Up time: 00:00:43

LDP discovery sources:

Serial1/1, Src IP addr: 12.1.1.1

Addresses bound to peer LDP Ident:

15.1.1.1 12.1.1.1 1.1.1.1

r2#

: 646

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41 159

4 R2 R3

R2R3 S1/0Transport IPRouter-ID2.2.2.2

R3 2.2.2.2 R2 R3 LDP

R2 R1 S1/0 Transport IP

r2(config)#int s1/0

r2(config-if)#mpls ldp discovery transport-address interface

r2(config-if)#exi

R3 Transport IP Router-ID 3.3.3.3 R2

R3 OSPF R2 ping

LDP

r3(config)#router ospf 2

r3(config-router)#network 3.3.3.3 0.0.0.0 area 0

r3(config-router)#exi

R2 LDP

r2#sh mpls ldp discovery detail

Local LDP Identifier:

2.2.2.2:0

Discovery Sources:

Interfaces:

Serial1/0 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 23.1.1.2

LDP Id: 3.3.3.3:0

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Src IP addr: 23.1.1.3; Transport IP addr: 3.3.3.3

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 3.3.3.3/32

Serial1/1 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 12.1.1.2

LDP Id: 12.1.1.1:0; no host route to transport addr

Src IP addr: 12.1.1.1; Transport IP addr: 12.1.1.1

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 12.1.1.0/24

r2#

:R2 R3 S1/0 Transport IP 23.1.1.2

R2 R3 LDP

r2#sh mpls ldp neighbor

Peer LDP Ident: 3.3.3.3:0; Local LDP Ident 2.2.2.2:0

TCP connection: 3.3.3.3.646 - 23.1.1.2.61206

State: Oper; Msgs sent/rcvd: 10/9; Downstream

Up time: 00:00:09

LDP discovery sources:

Serial1/0, Src IP addr: 23.1.1.3

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Addresses bound to peer LDP Ident:

23.1.1.3 34.1.1.3 3.3.3.3

Peer LDP Ident: 12.1.1.1:0; Local LDP Ident 2.2.2.2:0

TCP connection: 12.1.1.1.646 - 12.1.1.2.44954

State: Oper; Msgs sent/rcvd: 10/10; Downstream

Up time: 00:00:03

LDP discovery sources:

Serial1/1, Src IP addr: 12.1.1.1

Addresses bound to peer LDP Ident:

15.1.1.1 12.1.1.1 1.1.1.1

r2#

: R2 R3 LDP

5R3 R4

R3 Router-ID OSPF R4 R4

Loopback loop OSPF R3 LDP

: LDP R1 R2 R2 R3 R3 R4

7.

: R4 loopback0 4.4.4.4/32

1 R4 LFIB 4.4.4.4

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r4#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Pop tag 23.1.1.0/24 0 Se1/1 34.1.1.3

17 16 12.1.1.0/24 0 Se1/1 34.1.1.3

18 18 15.1.1.0/24 0 Se1/1 34.1.1.3

19 Pop tag 3.3.3.3/32 0 Se1/1 34.1.1.3

r4#

:R4 LFIB

2 R4 CEF 4.4.4.4

CEF

r4#sh ip cef 4.4.4.4

4.4.4.4/32, version 15, epoch 0, connected, receive

tag information set

local tag: implicit-null

r4#

:R4 CEF 4.4.4.4 implicit-null(

MPLS)

4.4.4.4

3 R3 CEF 4.4.4.4

r3#sh ip cef 4.4.4.4

www.china-ccie.com

45 159

4.4.4.4/32, version 19, epoch 0, cached adjacency 34.1.1.4

0 packets, 0 bytes

tag information set

local tag: 19

via 34.1.1.4, Serial1/1, 0 dependencies

next hop 34.1.1.4, Serial1/1

valid cached adjacency

tag rewrite with Se1/1, 34.1.1.4, tags imposed: {}

r3#

:4.4.4.4 R4 implicit-null R3

R3 R4 R3 4.4.4.4

R3 4.4.4.4

R3 4.4.4.4

19 19

4 R3 LFIB

r3#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Pop tag 12.1.1.0/24 0 Se1/0 23.1.1.2

17 Pop tag 46.1.1.0/24 0 Se1/1 34.1.1.4

18 18 15.1.1.0/24 0 Se1/0 23.1.1.2

19 Pop tag 4.4.4.4/32 0 Se1/1 34.1.1.4

r3#

www.china-ccie.com

46 159

: R3 4.4.4.4 19

Pop tag R3

19 S1/0

5 R3 FIB

LSR FIB LFIB

LFIB

r3#sh mpls ip binding

2.2.2.2/32

out label: imp-null lsr: 2.2.2.2:0

3.3.3.3/32

in label: imp-null

out label: 19 lsr: 2.2.2.2:0

out label: 19 lsr: 4.4.4.4:0

4.4.4.4/32

in label: 19

out label: imp-null lsr: 4.4.4.4:0 inuse

out label: 20 lsr: 2.2.2.2:0

12.1.1.0/24

in label: 16

out label: imp-null lsr: 2.2.2.2:0 inuse

out label: 17 lsr: 4.4.4.4:0

15.1.1.0/24

www.china-ccie.com

47 159

in label: 18

out label: 18 lsr: 2.2.2.2:0 inuse

out label: 18 lsr: 4.4.4.4:0

23.1.1.0/24

in label: imp-null

out label: imp-null lsr: 2.2.2.2:0

out label: 16 lsr: 4.4.4.4:0

34.1.1.0/24

in label: imp-null

out label: 16 lsr: 2.2.2.2:0

out label: imp-null lsr: 4.4.4.4:0

46.1.1.0/24

in label: 17

out label: 17 lsr: 2.2.2.2:0

out label: imp-null lsr: 4.4.4.4:0 inuse

r3#

: 4.4.4.4 in 19,

20 imp-null imp-null inuse imp-null

6 R2 LFIB

r2#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

www.china-ccie.com

48 159

tag tag or VC or Tunnel Id switched interface

16 Pop tag 34.1.1.0/24 0 Se1/0 23.1.1.3

17 17 46.1.1.0/24 0 Se1/0 23.1.1.3

18 Pop tag 15.1.1.0/24 0 Se1/1 12.1.1.1

19 Pop tag 3.3.3.3/32 0 Se1/0 23.1.1.3

20 19 4.4.4.4/32 0 Se1/0 23.1.1.3

r2#

: R3 19 S1/1 R4 R2

R3 19 19R2

4.4.4.4 19 20 R2

20 19 S1/0 R3

R3 R4R2 4.4.4.4 20

20

7 R2 CEF 4.4.4.4

r2#sh ip cef 4.4.4.4

4.4.4.4/32, version 25, epoch 0, cached adjacency 23.1.1.3

0 packets, 0 bytes

tag information set

local tag: 20

fast tag rewrite with Se1/0, 23.1.1.3, tags imposed: {19}

via 23.1.1.3, Serial1/0, 0 dependencies

next hop 23.1.1.3, Serial1/0

valid cached adjacency

www.china-ccie.com

49 159

tag rewrite with Se1/0, 23.1.1.3, tags imposed: {19}

r2#

:R2 4.4.4.4 20 1919 R3

8 R1 LFIB

r1#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 16 34.1.1.0/24 0 Se1/1 12.1.1.2

17 Pop tag 23.1.1.0/24 0 Se1/1 12.1.1.2

18 17 46.1.1.0/24 0 Se1/1 12.1.1.2

19 19 3.3.3.3/32 0 Se1/1 12.1.1.2

20 20 4.4.4.4/32 0 Se1/1 12.1.1.2

r1#

: R2 4.4.4.4 20 R1

R1 20 R1 4.4.4.4 20

R1 20

20 S1/1

9 R1 4.4.4.4

r1#traceroute 4.4.4.4

Type escape sequence to abort.

Tracing the route to 4.4.4.4

www.china-ccie.com

50 159

1 12.1.1.2 [MPLS: Label 20 Exp 0] 156 msec 220 msec 156 msec

2 23.1.1.3 [MPLS: Label 19 Exp 0] 168 msec 188 msec 196 msec

3 34.1.1.4 160 msec * 140 msec

r1#

: 4.4.4.4R4 R3R3 R2

19, R2 19 R3 R2 R1 20 R1

20 R2 traceroute 12.1.1.2(R2)

20, 23.1.1.3R3 19, R3 34.1.1.4R4

10 IP R5 traceroute 4.4.4.4

r5#traceroute 4.4.4.4

Type escape sequence to abort.

Tracing the route to 4.4.4.4

1 15.1.1.1 136 msec 72 msec 84 msec

2 12.1.1.2 300 msec 368 msec 192 msec

3 23.1.1.3 252 msec 296 msec 148 msec

4 34.1.1.4 216 msec * 188 msec

r5#

:IP MPLS

MPLS

www.china-ccie.com

51 159

8.

: 6.6.6.6 R4

IP IP

6.6.6.6 R6 R4

6.6.6.6R4

1 R4 6.6.6.6

r4#sh mpls ip binding

3.3.3.3/32

in label: 19

out label: imp-null lsr: 3.3.3.3:0 inuse

4.4.4.4/32

in label: imp-null

out label: 19 lsr: 3.3.3.3:0

6.6.6.6/32

in label: 20

out label: 20 lsr: 3.3.3.3:0

12.1.1.0/24

in label: 17

out label: 16 lsr: 3.3.3.3:0 inuse

15.1.1.0/24

in label: 18

out label: 18 lsr: 3.3.3.3:0 inuse

www.china-ccie.com

52 159

23.1.1.0/24

in label: 16

out label: imp-null lsr: 3.3.3.3:0 inuse

34.1.1.0/24

in label: imp-null

out label: imp-null lsr: 3.3.3.3:0

46.1.1.0/24

in label: imp-null

out label: 17 lsr: 3.3.3.3:0

r4#

: 4.4.4.4 R4in label

6.6.6.6

in label 20

2 R4CEF 6.6.6.6

r4#sh ip cef 6.6.6.6

6.6.6.6/32, version 20, epoch 0, cached adjacency 46.1.1.6

0 packets, 0 bytes

tag information set

local tag: 20

via 46.1.1.6, Serial1/0, 0 dependencies

next hop 46.1.1.6, Serial1/0

valid cached adjacency

www.china-ccie.com

53 159

tag rewrite with Se1/0, 46.1.1.6, tags imposed: {}

r4#

:6.6.6.6 4.4.4.46.6.6.6

20.

3 R3 6.6.6.6:

r3#sh ip cef 6.6.6.6

6.6.6.6/32, version 20, epoch 0, cached adjacency 34.1.1.4

0 packets, 0 bytes

tag information set

local tag: 20

fast tag rewrite with Se1/1, 34.1.1.4, tags imposed: {20}

via 34.1.1.4, Serial1/1, 0 dependencies

next hop 34.1.1.4, Serial1/1

valid cached adjacency

tag rewrite with Se1/1, 34.1.1.4, tags imposed: {20}

r3#

:R3 6.6.6.6 ,() 20,,

()

4 R3 LFIB

r3#sh mpls forwarding-table

www.china-ccie.com

54 159

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Pop tag 12.1.1.0/24 1672 Se1/0 23.1.1.2

17 Pop tag 46.1.1.0/24 0 Se1/1 34.1.1.4

18 18 15.1.1.0/24 540 Se1/0 23.1.1.2

19 Pop tag 4.4.4.4/32 1132 Se1/1 34.1.1.4

20 20 6.6.6.6/32 540 Se1/1 34.1.1.4

r3#

:R3 6.6.6.6 20

5R2 6.6.6.6

r2#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Pop tag 34.1.1.0/24 0 Se1/0 23.1.1.3

17 17 46.1.1.0/24 0 Se1/0 23.1.1.3

18 Pop tag 15.1.1.0/24 520 Se1/1 12.1.1.1

19 Pop tag 3.3.3.3/32 0 Se1/0 23.1.1.3

20 19 4.4.4.4/32 756 Se1/0 23.1.1.3

21 20 6.6.6.6/32 540 Se1/0 23.1.1.3

r2#

www.china-ccie.com

55 159

:R3 20 R2 20 R2 6.6.6.6

21

6 R1 6.6.6.6

r1#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 16 34.1.1.0/24 0 Se1/1 12.1.1.2

17 Pop tag 23.1.1.0/24 0 Se1/1 12.1.1.2

18 17 46.1.1.0/24 0 Se1/1 12.1.1.2

19 19 3.3.3.3/32 0 Se1/1 12.1.1.2

20 20 4.4.4.4/32 0 Se1/1 12.1.1.2

21 21 6.6.6.6/32 0 Se1/1 12.1.1.2

r1#

:R1 R2 2121

7 R1

r1#traceroute 6.6.6.6

Type escape sequence to abort.

Tracing the route to 6.6.6.6

1 12.1.1.2 [MPLS: Label 21 Exp 0] 356 msec 284 msec 204 msec

www.china-ccie.com

56 159

2 23.1.1.3 [MPLS: Label 20 Exp 0] 388 msec 196 msec 192 msec

3 34.1.1.4 [MPLS: Label 20 Exp 0] 152 msec 268 msec 260 msec

4 46.1.1.6 244 msec * 172 msec

r1#

: R4 6.6.6.6 R3 20

R3 R2 20R2 R1 21 R1

R212.1.1.2 21R2 R3 20 R3

R4 20

8 IP R5 6.6.6.6

r5#traceroute 6.6.6.6

Type escape sequence to abort.

Tracing the route to 6.6.6.6

1 15.1.1.1 180 msec 92 msec 60 msec

2 12.1.1.2 308 msec 256 msec 264 msec

3 23.1.1.3 368 msec 200 msec 200 msec

4 34.1.1.4 232 msec 252 msec 144 msec

5 46.1.1.6 248 msec * 408 msec

r5#

IP R5

www.china-ccie.com

57 159

9.

: LSR

1 R3 4.4.4.4

r3#sh mpls forwarding-table 4.4.4.4 detail

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

19 Pop tag 4.4.4.4/32 1744 Se1/1 34.1.1.4

MAC/Encaps=4/4, MRU=1504, Tag Stack{}

4CA18847

No output feature configured

Per-packet load-sharing

r3

2 R3 6.6.6.6

r3#sh mpls forwarding-table 6.6.6.6 detail

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

20 20 6.6.6.6/32 2028 Se1/1 34.1.1.4

MAC/Encaps=4/8, MRU=1500, Tag Stack{20}

4CA18847 00014000

No output feature configured

Per-packet load-sharing

www.china-ccie.com

58 159

10.

: LSR LSR

1

: R1 6.6.6.6

r1(config)#access-list 6 permit 6.6.6.6

r1(config)#mpls ldp neighbor 12.1.1.2 labels accept 6

: 12.1.1.2 ACL 6

2 LFIB

r1#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Untagged 34.1.1.0/24 0 Se1/1 12.1.1.2

17 Untagged 23.1.1.0/24 0 Se1/1 12.1.1.2

18 Untagged 46.1.1.0/24 0 Se1/1 12.1.1.2

19 Untagged 3.3.3.3/32 0 Se1/1 12.1.1.2

20 Untagged 4.4.4.4/32 0 Se1/1 12.1.1.2

21 21 6.6.6.6/32 0 Se1/1 12.1.1.2

r1#

www.china-ccie.com

59 159

: 6.6.6.6 21

3

: LSR

R3 6.6.6.6 R2

R2

r2#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Pop tag 34.1.1.0/24 0 Se1/0 23.1.1.3

17 17 46.1.1.0/24 0 Se1/0 23.1.1.3

18 Pop tag 15.1.1.0/24 3340 Se1/1 12.1.1.1

19 Pop tag 3.3.3.3/32 0 Se1/0 23.1.1.3

20 19 4.4.4.4/32 972 Se1/0 23.1.1.3

21 20 6.6.6.6/32 1188 Se1/0 23.1.1.3

: 6.6.6.6

4 R3 6.6.6.6 R2

r3(config)#access-list 2 permit 2.2.2.2 Router-ID

r3(config)#access-list 6 permit 6.6.6.6

www.china-ccie.com

60 159

ldp advertise-labels

r3(config)#mpls ldp advertise-labels for 6 to 2

r3(config)#exi

5 R2 6.6.6.6:

r2#sh mpls forwarding-table

Local Outgoing Prefix Bytes tag Outgoing Next Hop

tag tag or VC or Tunnel Id switched interface

16 Untagged 34.1.1.0/24 0 Se1/0 23.1.1.3

17 Untagged 46.1.1.0/24 0 Se1/0 23.1.1.3

18 Untagged 15.1.1.0/24 3340 Se1/1 12.1.1.1

19 Untagged 3.3.3.3/32 0 Se1/0 23.1.1.3

20 Untagged 4.4.4.4/32 972 Se1/0 23.1.1.3

21 20 6.6.6.6/32 1188 Se1/0 23.1.1.3

: 6.6.6.6

6 R3

r3#sh mpls ldp bindings advertisement-acls

Advertisement spec:

Prefix acl = 6; Peer acl = 2

tib entry: 2.2.2.2/32, rev 13

www.china-ccie.com

61 159

tib entry: 3.3.3.3/32, rev 4

tib entry: 4.4.4.4/32, rev 15

tib entry: 6.6.6.6/32, rev 18

Advert acl(s): Prefix acl 6; Peer acl 2

tib entry: 12.1.1.0/24, rev 8

tib entry: 15.1.1.0/24, rev 12

tib entry: 23.1.1.0/24, rev 6

tib entry: 34.1.1.0/24, rev 2

tib entry: 46.1.1.0/24, rev 10

r3#

LDP

:

1 R2 R1 cisco R1:

r2(config)#mpls ldp neighbor 12.1.1.1 password 0 cisco

r2(config)#

: Router-ID,0

www.china-ccie.com

62 159

LDP

LDPLDP hello hello

hello hello LDP Link Hello

LDP LDP sessionsLDP

hello LDP Targeted Hello targeted

session LSR

LSR

targeted session LSR

LSR

Targeted Hello

targeted session

www.china-ccie.com

63 159

:R1 loopback0 1.1.1.1/32R2 loopback0 2.2.2.2/32R3 loopback0

3.3.3.3/32OSPF loopback OSPFLDP

R1 R2 S1/0 R1 R2

LDP R1 R2 R3

1.

1 R1

R1(config)# mpls ldp session protection

2 R2

R2(config)# mpls ldp session protection

3 ACL

router(config)#access 1 per 1.1.1.1

www.china-ccie.com

64 159

router(config)#mpls ldp session protection for 1 duration 90s

2.

1

r1#sh mpls ld neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.23261 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 9/9; Downstream

Up time: 00:00:04

LDP discovery sources:

Serial1/0, Src IP addr: 12.1.1.2

Addresses bound to peer LDP Ident:

23.1.1.2 12.1.1.2 2.2.2.2

:

2

r1#sh mpls ld neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.39052 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 11/11; Downstream

Up time: 00:02:27

LDP discovery sources:

www.china-ccie.com

65 159

Serial1/0, Src IP addr: 12.1.1.2

Targeted Hello 1.1.1.1 -> 2.2.2.2, active, passive

Addresses bound to peer LDP Ident:

23.1.1.2 12.1.1.2 2.2.2.2

r1#

: R2

3 discovery

r1#sh mpls ld discovery detail

Local LDP Identifier:

1.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/0 (ldp): xmit/recv

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0

Src IP addr: 12.1.1.2; Transport IP addr: 2.2.2.2

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 2.2.2.2/32

Serial1/1 (ldp): xmit

Enabled: Interface config

www.china-ccie.com

66 159

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

Targeted Hellos:

1.1.1.1 -> 2.2.2.2 (ldp): active/passive, xmit/recv

Hello interval: 10000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0

Src IP addr: 2.2.2.2; Transport IP addr: 2.2.2.2

Hold time: 90 sec; Proposed local/peer: 90/90 sec

Reachable via 2.2.2.2/32

r1#

:

4 R1 R2:

r1#sh mpls ld discovery detail

Local LDP Identifier:

1.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/1 (ldp): xmit

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

Targeted Hellos:

www.china-ccie.com

67 159

1.1.1.1 -> 2.2.2.2 (ldp): active/passive, xmit/recv

Hello interval: 10000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0

Src IP addr: 2.2.2.2; Transport IP addr: 2.2.2.2

Hold time: 90 sec; Proposed local/peer: 90/90 sec

Reachable via 2.2.2.2/32

r1#

r1#sh mpls ld neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.39052 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 15/13; Downstream

Up time: 00:03:27

LDP discovery sources:

Targeted Hello 1.1.1.1 -> 2.2.2.2, active, passive

Addresses bound to peer LDP Ident:

23.1.1.2 12.1.1.2 2.2.2.2

r1#

:R1 R2LDP

www.china-ccie.com

68 159

3.

:

1 R1

: Router-ID

r1(config)#mpls ldp neighbor 2.2.2.2 targeted ldp LDP TDP

2R2

R2(config)#mpls ldp neighbor 1.1.1.1 targeted ldp

3:

r1#sh mpls ld neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.23261 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 9/9; Downstream

Up time: 00:00:04

LDP discovery sources:

Serial1/0, Src IP addr: 12.1.1.2

Addresses bound to peer LDP Ident:

23.1.1.2 12.1.1.2 2.2.2.2

r1#

:

www.china-ccie.com

69 159

r1#sh mpls ldp neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.23261 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 10/10; Downstream

Up time: 00:01:23

LDP discovery sources:

Serial1/0, Src IP addr: 12.1.1.2

Targeted Hello 1.1.1.1 -> 2.2.2.2, active, passive

Addresses bound to peer LDP Ident:

23.1.1.2 12.1.1.2 2.2.2.2

r1#

r1#sh mpls ld discovery detail

Local LDP Identifier:

1.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/0 (ldp): xmit/recv

Enabled: Interface config

www.china-ccie.com

70 159

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0

Src IP addr: 12.1.1.2; Transport IP addr: 2.2.2.2

Hold time: 15 sec; Proposed local/peer: 15/15 sec

Reachable via 2.2.2.2/32

Serial1/1 (ldp): xmit

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

Targeted Hellos:

1.1.1.1 -> 2.2.2.2 (ldp): active/passive, xmit/recv

Hello interval: 10000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0

Src IP addr: 2.2.2.2; Transport IP addr: 2.2.2.2

Hold time: 90 sec; Proposed local/peer: 90/90 sec

Reachable via 2.2.2.2/32

r1#

: R2

4 R1 R2:

r1#sh mpls ld discovery detail

Local LDP Identifier:

www.china-ccie.com

71 159

1.1.1.1:0

Discovery Sources:

Interfaces:

Serial1/1 (ldp): xmit

Enabled: Interface config

Hello interval: 5000 ms; Transport IP addr: 1.1.1.1

Targeted Hellos:

1.1.1.1 -> 2.2.2.2 (ldp): active/passive, xmit/recv

Hello interval: 10000 ms; Transport IP addr: 1.1.1.1

LDP Id: 2.2.2.2:0

Src IP addr: 2.2.2.2; Transport IP addr: 2.2.2.2

Hold time: 90 sec; Proposed local/peer: 90/90 sec

Reachable via 2.2.2.2/32

r1#

r1#sh mpls ldp neighbor

Peer LDP Ident: 2.2.2.2:0; Local LDP Ident 1.1.1.1:0

TCP connection: 2.2.2.2.23261 - 1.1.1.1.646

State: Oper; Msgs sent/rcvd: 15/13; Downstream

Up time: 00:02:50

LDP discovery sources:

www.china-ccie.com

72 159

Targeted Hello 1.1.1.1 -> 2.2.2.2, active, passive

Addresses bound to peer LDP Ident:

23.1.1.2 12.1.1.2 2.2.2.2

r1#

:R1 R2LDP

IGP LDP

LDP

IGP IP LDP

IGP LDP LSR

IGP LDP

IGP LDP mpls ip

OSPF LDPOSPF LDP

holddown OSPF holddownLDP

OSPF LDP

Metric 65536

www.china-ccie.com

73 159

: OSPF R1 R2 R1 R3 LDP R1 R2

R1 loopback0 1.1.1.1/32R2 loopback0 2.2.2.2/32

R3 loopback0 3.3.3.3/32 loopback OSPF

1. IGP LDP

: R1 IGP LDP

1 OSPF IGP LDP

mpls ip

R1(config)#router os 2

R1(config-router)#mpls ldp sync

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74 159

2.

r1#sh ip ospf mpls ldp interface

Serial1/1

Process ID 2, Area 0

LDP is not configured through LDP autoconfig

LDP-IGP Synchronization : Not required

Holddown timer is disabled

Interface is up

Serial1/0

Process ID 2, Area 0

LDP is not configured through LDP autoconfig

LDP-IGP Synchronization : Required

Holddown timer is configured : 10000 msecs

Holddown timer is not running

Interface is up and sending maximum metric

Loopback0

Process ID 2, Area 0

LDP is not configured through LDP autoconfig

LDP-IGP Synchronization : Not required

Holddown timer is disabled

Interface is up

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75 159

r1#

: S1/0 mpls ip

Holddown

r1(config)#mpls ldp igp sync holddown 10000

3. Holddown

OSPF LDP

Holddown LDPOSPF

4.

: R2 LDP R1 LDP

HolddownOSPFLDP

OSPF R1 R2 Metric

65536

1 R1 R2 OSPF

R3 R2 R1 R1 Metric 65536

r1#sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

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76 159

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

C 1.1.1.1 is directly connected, Loopback0

2.0.0.0/32 is subnetted, 1 subnets

O 2.2.2.2 [110/65536] via 12.1.1.2, 00:00:55, Serial1/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/65] via 13.1.1.3, 00:00:55, Serial1/1

23.0.0.0/24 is subnetted, 1 subnets

O 23.1.1.0 [110/74] via 13.1.1.3, 00:00:55, Serial1/1

12.0.0.0/24 is subnetted, 1 subnets

C 12.1.1.0 is directly connected, Serial1/0

13.0.0.0/24 is subnetted, 1 subnets

C 13.1.1.0 is directly connected, Serial1/1

r1#

:R1 R2 2.2.2.2Metric 65546

2 R3

r3#sh ip route

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77 159

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

O 1.1.1.1 [110/65] via 13.1.1.1, 00:00:08, Serial1/1

2.0.0.0/32 is subnetted, 1 subnets

O 2.2.2.2 [110/65600] via 13.1.1.1, 00:00:08, Serial1/1

3.0.0.0/32 is subnetted, 1 subnets

C 3.3.3.3 is directly connected, Loopback0

23.0.0.0/24 is subnetted, 1 subnets

C 23.1.1.0 is directly connected, FastEthernet0/0

12.0.0.0/24 is subnetted, 1 subnets

O 12.1.1.0 [110/128] via 13.1.1.1, 00:00:08, Serial1/1

13.0.0.0/24 is subnetted, 1 subnets

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78 159

C 13.1.1.0 is directly connected, Serial1/1

r3#

: R3 R1 2.2.2.2 Metric 65536

64 65600

MPLS_VPN

MPLS

MPLS

VPN VPN VPN

IPSec VPN MPLS_VPN VPN

IP

IP

MPLS IP

IPSec VPN

MPLS_VPN

MPLS_VPN VPN

MPLS_VPN

MPLS_VPN

MPLS

MPLS_VPN

MPLS_VPN IPSec VPN

IPSec VPN

VPN

IPSec VPN VPN

MPLS_VPN

www.china-ccie.com

79 159

Internet

IP192.168.0.0172.16.0.010.0.0.0

Internet Internet

Internet

Internet

Internet

Internet MPLS MPLS LSR

IP MPLS

MPLS

MPLS

www.china-ccie.com

80 159

RD

Internet MPLS

MPLS MPLS

MPLS Internet

Internet IP

Internet

BGP MPLS BGP

BGP

MPLS MPLS IP

Internet

www.china-ccie.com

81 159

Internet

BGP

192.168.0.0 172.16.0.0

BGP BGP

BGP

BGP

BGP

BGP

BGP

RD BGP

RDBGP RD BGPMP-BGP

MP-BGP MPLS_VPN

32 bit RD 64 bit

RD 96 bit vpnv4

RD

RD

ASN:nn IP-address:nn

ASN BGP ASnn

10.1.1.0/24RD 100:1 vpnv4

100:1:10.1.1.0/24

VRF

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82 159

VPN

Internet

192.168.0.0/24 MP-BGP

192.168.0.0 BGP

R1

192.168.0.0

192.168.0.0 192.168.0.0

192.168.0.0

192.168.0.0

R1

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83 159

192.168.0.0

VRF

VPN

RT

VRF VRF VPN1

BGP RD

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84 159

VPN1

RD RD 100

1 RD 1002

VRF VPN1 RD 100

1 RD 1002 RD 100:1

VPN1

RT

VRF

VPN2 RD 1002 RT RD 1002

VPN2

RD VRF RT

VRF CCIE RD 1001

1002 1003 RD 1003 CCIE

CCIE RT 1003 RD 1003

VRF CCIE RD 1001 1002RT

BGP RD

VRF VRF RD RD RT

RD

RD VRF RT VRF

RD RD

VRF RD VRF

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85 159

R1 R2

VRF RD 1001

VRF RD 1002 VRF RD

1001 1002 VRF

RD

RD VRF RT

RD

RTRD BGP

VRFRT VRF

ISP P PE PEP P PE

MPLS

www.china-ccie.com

86 159

CE CCE ISP MPLS

CE PECE

PE PE

VPN P VPN VPN MPLS

P BGP

PEPE

MP-BGP

LAN1 Internet LAN2 Internet

LAN1 LAN2 MPLS_VPN

MPLS_VPN Internet MPLS

MPLS LSR P MPLS LSR PE

PE CE C

PE BGP PE

RD RD vpnv4 PE vpnv4 MP-BGP

MP-BGP vpnv4 MPLS BGP vpnv4

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87 159

BGP vpnv4 RD BGP

vpnv4 BGP RD

VRF VRF CE BGP vpnv4

MP-BGP

MPLS LSR

MP-BGP vpnv4 MPLS

BGP RD

MPLS_VPN

MP-BGP

BGP address-family MP-BGP

BGP IPv4 address-family

ipv4 IP address-family ipv4

unicast BGP ipv4 address-family ipv4 multicast

IPv6 address-family ipv6 unicast ipv6

multicast

address-family

ipv4 ipv4 ipv6 vpnv4

MP-BGP vpnv4 vpnv4 vpnv4 address-family

VRF vpn4 VRF

BGP BGPMP-BGP vpnv4

IOS vpnv4 MPLS

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88 159

PE-CE

MPLS_VPN PE

PE MP-BGP MP-BGP

PE PE

PE CE

PE

PE MP-BGP

MP-BGP CE

PEMP-BGP CE

MP-BGP PE CE BGP

IGP MP-BGP

PE CE VRF

CE VRF

PE CE

RIPv2

OSPF

EIGRP

IS-IS

PE CE

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89 159

PE CE

1.

1PE VRF:

r4(config)#ip route 0.0.0.0 0.0.0.0 14.1.1.4

2 PE MP-BGP:

r1(config)#router bgp 100

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#redistribute static

r1(config-router-af)#exi

(3)CE PE:

r4(config)#ip route 0.0.0.0 0.0.0.0 14.1.1.1

2.RIPv2

RIP metric 15 RIP

metric RIP metric

default-metric

1PE RIP:

r1(config)#router rip

r1(config-router)#version 2

r1(config-router)#no auto-summary

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90 159

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#no auto-summary

r1(config-router-af)#network 14.0.0.0

r1(config-router-af)#redistribute bgp 100 metric 1

2 RIP MP-BGP:

r1(config)#router bgp 100

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#redistribute rip

3CE RIP:

r4(config)#router rip

r4(config-router)#version 2

r4(config-router)#no auto-summary

r4(config-router)#network 14.0.0.0

r4(config-router)#network 10.0.0.0

3.OSPF

:OSPF Sham-lin CCIE R&S

v4.0!

1 PE OSPF:

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91 159

r3(config)#router ospf 100 vrf vpn1

r3(config-router)#router-id 36.1.1.3

r3(config-router)#network 36.1.1.3 0.0.0.0 area 0

r3(config-router)#redistribute bgp 100 subnets

2 OSPP MP-BGP:

r3(config)#router bgp 100

r3(config-router)#address-family ipv4 vrf vpn1

r3(config-router-af)#redistribute ospf 100

3CE OSPF:

r6(config)#router ospf 100

r6(config-router)#router-id 6.6.6.6

r6(config-router)#network 36.1.1.6 0.0.0.0 area 0

r6(config-router)#network 192.168.1.6 0.0.0.0 area 0

r6(config-router)#exit

r6(config)#

4.EIGRP

1 PE EIGRP:

r3(config)#router eigrp 1

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92 159

r3(config-router)#no auto-summary

r3(config-router)#address-family ipv4 vrf vpn2

r3(config-router-af)#no auto-summary

r3(config-router-af)#network 83.1.1.3 0.0.0.0

r3(config-router-af)#autonomous-system 1

r3(config-router-af)#redistribute bgp 100 metric 10000 100 255 1 1500

2 EIGRP MP-BGP:

r3(config)#router bgp 100

r3(config-router)#address-family ipv4 vrf vpn2

r3(config-router-af)#redistribute eigrp 1

3CE EIGRP:

r8(config)#router eigrp 1

r8(config-router)#no auto-summary

r8(config-router)#network 172.16.1.8 0.0.0.0

r8(config-router)#network 83.1.1.8 0.0.0.0

IS-IS

5.

IOS CE PE EBGP

EBGP

1PE EBGP:

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93 159

r1(config)#router bg 100

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#neighbor 14.1.1.4 remote-as 200

r1(config-router-af)#neighbor 14.1.1.4 activate

2 CE EBGP MP-BGP:

3CE EBGP:

r4(config)#router bgp 200

r4(config-router)#neighbor 14.1.1.1 remote

r4(config-router)#neighbor 14.1.1.1 remote-as 100

r4(config-router)#network 10.1.1.0 mask 255.255.255.0

r4(config-router)#

ASCE AS

r1(config)#router bgp 100

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#neighbor 14.1.1.4 as-override

PE CEhub-spokenei allowas-in 1-10

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94 159

MPLS_VPN

MPLS_VPN R1R2R3

loopback0 1.1.1.1/322.2.2.2/323.3.3.3/32 OSPF

MPLS loopback

1. MPLS

:MP-BGP MPLS_VPN MPLS_VPN

MPLS loopback

1 MPLS MPLS

2 MPLS_VPN R1 R3 MP-BGP

loopback loopback

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95 159

r1#traceroute 3.3.3.3

Type escape sequence to abort.

Tracing the route to 3.3.3.3

1 12.1.1.2 [MPLS: Label 17 Exp 0] 104 msec 120 msec 140 msec

2 23.1.1.3 72 msec * 112 msec

r1#

:R1 R3 loopback0

r3#traceroute 1.1.1.1

Type escape sequence to abort.

Tracing the route to 1.1.1.1

1 23.1.1.2 [MPLS: Label 16 Exp 0] 100 msec 140 msec 196 msec

2 12.1.1.1 160 msec * 224 msec

r3#

:R3 R1 loopback0

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96 159

2. BGP

: R1 R3 BGPMP-BGP BGP

1 R1 BGP

r1(config)#router bgp 100

r1(config-router)#neighbor 3.3.3.3 remote-as 100

r1(config-router)#neighbor 3.3.3.3 update-source loopback 0

2 R2 BGP

r3(config)#router bgp 100

r3(config-router)#neighbor 1.1.1.1 remote-as 100

r3(config-router)#neighbor 1.1.1.1 update-source loopback 0

3 R1 R3 BGP

r1#sh ip bgp summary

BGP router identifier 1.1.1.1, local AS number 100

BGP table version is 1, main routing table version 1

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

3.3.3.3 4 100 3 3 1 0 0 00:00:51 0

r1#

: R1 R3 BGP

4 R3 R1 BGP

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97 159

r3#sh ip bgp summary

BGP router identifier 3.3.3.3, local AS number 100

BGP table version is 1, main routing table version 1

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

1.1.1.1 4 100 4 4 1 0 0 00:01:07 0

r3#

: R3 R1 BGP

3. PE VRF

: PE VRF RD

VRF RD

1 R1 VRF RD

r1(config)#ip vrf vpn1

r1(config-vrf)#rd 100:1

2 R3 VRF RD

r3(config)#ip vrf vpn1

r3(config-vrf)#rd 100:1

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98 159

4. PE CE VRF

: PE CE VRF

VRF VRF

1 R1 CE R4 s1/1 VRF:

r1(config)#int s1/1

r1(config-if)#ip vrf forwarding vpn1

% Interface Serial1/1 IP address 14.1.1.1 removed due to enabling VRF vpn1

r1(config-if)# ip add 14.1.1.1 255.255.255.0

: VRF

IP

(2) R3 CE R6 s1/0 VRF:

r3(config)#int s1/0

r3(config-if)#ip vrf forwarding vpn1

% Interface Serial1/0 IP address 36.1.1.3 removed due to enabling VRF vpn1

r3(config-if)#ip add 36.1.1.3 255.255.255.0

5. PE VRF

: PEPE VRF

PE VRF

1 R1 VRF vpn1:

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99 159

r1#sh ip route vrf vpn1

Routing Table: vpn1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

14.0.0.0/24 is subnetted, 1 subnets

C 14.1.1.0 is directly connected, Serial1/1

r1#

:PE CE R4 s1/1 VRF vpn1 VRF

vpn1

2 PE R1 CE s1/1

r1#sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

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100 159

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

1.0.0.0/32 is subnetted, 1 subnets

C 1.1.1.1 is directly connected, Loopback0

2.0.0.0/32 is subnetted, 1 subnets

O 2.2.2.2 [110/65] via 12.1.1.2, 00:14:25, Serial1/0

3.0.0.0/32 is subnetted, 1 subnets

O 3.3.3.3 [110/129] via 12.1.1.2, 00:14:25, Serial1/0

23.0.0.0/24 is subnetted, 1 subnets

O 23.1.1.0 [110/128] via 12.1.1.2, 00:14:25, Serial1/0

12.0.0.0/24 is subnetted, 1 subnets

C 12.1.1.0 is directly connected, Serial1/0

r1#

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101 159

6. MP-BGP

: PE VRFVRF

MP-BGP

6 (1) PE R1 MP-BGP

r1(config)#router bgp 100

r1(config-router)#address-family vpnv4

r1(config-router-af)#neighbor 3.3.3.3 activate

r1(config-router-af)#neighbor 3.3.3.3 send-community both

: vpnv4 address-family vpnv4

BGP vpnv4 BGP

2 PE R3 MP-BGP

r3(config)#router bgp 100

r3(config-router)#address-family vpnv4

r3(config-router-af)#neighbor 1.1.1.1 activate

r3(config-router-af)#neighbor 1.1.1.1 send-community both

3 MP-BGP

r1#sh ip bgp all summary

For address family: IPv4 Unicast

BGP router identifier 1.1.1.1, local AS number 100

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102 159

BGP table version is 1, main routing table version 1

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

3.3.3.3 4 100 23 23 1 0 0 00:03:18 0

For address family: VPNv4 Unicast

BGP router identifier 1.1.1.1, local AS number 100

BGP table version is 1, main routing table version 1

Neighbor V AS MsgRcvd MsgSent TblVer InQ OutQ Up/Down State/PfxRcd

3.3.3.3 4 100 23 23 1 0 0 00:03:18 0

r1#

:R1 R3 BGP MP-BGP

7. MP-BGP VRF

r1#sh ip bgp vpnv4 all

r1#

: PE MP-BGP BGP VRF BGP

VRF VRF

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103 159

8. MP-BGP VRF

:MP-BGP VRF

VRF VRF

1 R1 MP-BGP VRF vpn1:

r1(config)#router bgp 100

r1(config-router)#address-family ipv4 vrf vpn1

2 R3 MP-BGP VRF vpn1:

r3(config)#router bgp 100

r3(config-router)#address-family ipv4 vrf vpn1

3 VRF:

r1#sh ip bgp vpnv4 all

r1#

r1#sh ip bgp vpnv4 vrf vpn1

r1#

:BGP VRF

9. RT VRF

: MP-BGP VRF RT

MP-BGP VRF RT RT

RD VRF

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104 159

1 R1 VRF RT

r1(config)#ip vrf vpn1

r1(config-vrf)#route-target both 100:1

VRF vpn1 RD 100:1

2 R3 VRF RT

r3(config)#ip vrf vpn1

r3(config-vrf)#route-target both 100:1

10. PE-CE

: MP-BGP VRF PE

MP-BGP VRF MP-BGP

VRF CE

MP-BGP VRF

1 PE R1 RIP:

:PE-CE RIP 2

r1(config)#router rip

r1(config-router)#version 2

r1(config-router)#no auto-summary

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#no auto-summary

r1(config-router-af)#network 14.0.0.0

r1(config-router-af)#redistribute bgp 100 metric 1

www.china-ccie.com

105 159

address-family

MP-BGP RIP CE

2 CE R4 RIP:

: CE PE

r4(config)#router rip

r4(config-router)#version 2

r4(config-router)#no auto-summary

r4(config-router)#network 14.0.0.0

r4(config-router)#network 10.0.0.0

3 PE R3 OSPF:

:MP-BGP OSPF CE

r3(config)#router ospf 100 vrf vpn1

r3(config-router)#router-id 36.1.1.3

r3(config-router)#network 36.1.1.3 0.0.0.0 area 0

r3(config-router)#redistribute bgp 100 subnets

4 CE R6 OSPP:

:CE OSPF OSPF

r6(config)#router ospf 100

r6(config-router)#router-id 6.6.6.6

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106 159

r6(config-router)#network 36.1.1.6 0.0.0.0 area 0

r6(config-router)#network 192.168.1.6 0.0.0.0 area 0

r6(config-router)#exit

r6(config)#

11. PE VRF

: PE CE PE

(1) R1 CE R4 10.1.1.0/24:

r1#sh ip route vrf vpn1

Routing Table: vpn1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

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107 159

10.0.0.0/24 is subnetted, 1 subnets

R 10.1.1.0 [120/1] via 14.1.1.4, 00:00:27, Serial1/1

14.0.0.0/24 is subnetted, 1 subnets

C 14.1.1.0 is directly connected, Serial1/1

r1#

:PE R1 RIP

(2) MP-BGP VRF

r1#sh ip bgp vpnv4 all

r1#

:MP-BGP VRF PE CE

IGP IGP MP-BGP VRF

12. MP-BGP

:PE-CE IGP MP-BGP

1 R1 RIP MP-BGP:

r1(config)#router bgp 100

r1(config-router)#address-family ipv4 vrf vpn1

r1(config-router-af)#redistribute rip

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108 159

2 R3 OSPP MP-BGP:

r3(config)#router bgp 100

r3(config-router)#address-family ipv4 vrf vpn1

r3(config-router-af)#redistribute ospf 100

13. MP-BGP

:MP-BGP IGP

1 R1 MP-BGP VRF:

r1#sh ip bgp vpnv4 all

BGP table version is 9, local router ID is 1.1.1.1

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path

Route Distinguisher: 100:1 (default for vrf vpn1)

*> 10.1.1.0/24 14.1.1.4 1 32768 ?

*> 14.1.1.0/24 0.0.0.0 0 32768 ?

*>i36.1.1.0/24 3.3.3.3 0 100 0 ?

*>i192.168.1.6/32 3.3.3.3 65 100 0 ?

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109 159

r1#

:

2 R3 MP-BGP VRF:

r3#sh ip bgp vpnv4 all

BGP table version is 9, local router ID is 3.3.3.3

Status codes: s suppressed, d damped, h history, * valid, > best, i - internal,

r RIB-failure, S Stale

Origin codes: i - IGP, e - EGP, ? - incomplete

Network Next Hop Metric LocPrf Weight Path

Route Distinguisher: 100:1 (default for vrf vpn1)

*>i10.1.1.0/24 1.1.1.1 1 100 0 ?

*>i14.1.1.0/24 1.1.1.1 0 100 0 ?

*> 36.1.1.

0/24 0.0.0.0 0 32768 ?

*> 192.168.1.6/32 36.1.1.6 65 32768 ?

r3#

14. VRF

:MP-BGP VRF

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110 159

1 R1 VRF

r1#show ip route vrf vpn1

Routing Table: vpn1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

36.0.0.0/24 is subnetted, 1 subnets

B 36.1.1.0 [200/0] via 3.3.3.3, 00:02:50

10.0.0.0/24 is subnetted, 1 subnets

R 10.1.1.0 [120/1] via 14.1.1.4, 00:00:04, Serial1/1

192.168.1.0/32 is subnetted, 1 subnets

B 192.168.1.6 [200/65] via 3.3.3.3, 00:02:50

14.0.0.0/24 is subnetted, 1 subnets

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111 159

C 14.1.1.0 is directly connected, Serial1/1

r1#

:PE R1 VRF VRF

2 R3 VRF

r3#show ip route vrf vpn1

Routing Table: vpn1

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

36.0.0.0/24 is subnetted, 1 subnets

C 36.1.1.0 is directly connected, Serial1/0

10.0.0.0/24 is subnetted, 1 subnets

www.china-ccie.com

112 159

B 10.1.1.0 [200/1] via 1.1.1.1, 00:04:57

192.168.1.0/32 is subnetted, 1 subnets

O 192.168.1.6 [110/65] via 36.1.1.6, 00:04:01, Serial1/0

14.0.0.0/24 is subnetted, 1 subnets

B 14.1.1.0 [200/0] via 1.1.1.1, 00:04:57

r3#

:PE R1 VRF VRF

15. CE

: PE PE CE

CE

1 CE R4

r4#sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

www.china-ccie.com

113 159

Gateway of last resort is not set

36.0.0.0/24 is subnetted, 1 subnets

R 36.1.1.0 [120/1] via 14.1.1.1, 00:00:26, Serial1/1

10.0.0.0/24 is subnetted, 1 subnets

C 10.1.1.0 is directly connected, Serial1/0

192.168.1.0/32 is subnetted, 1 subnets

R 192.168.1.6 [120/1] via 14.1.1.1, 00:00:26, Serial1/1

14.0.0.0/24 is subnetted, 1 subnets

C 14.1.1.0 is directly connected, Serial1/1

r4#

r4#

:CE R4

2 CE R6

r6#sh ip route

Codes: C - connected, S - static, R - RIP, M - mobile, B - BGP

D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area

N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2

E1 - OSPF external type 1, E2 - OSPF external type 2

i - IS-IS, su - IS-IS summary, L1 - IS-IS level-1, L2 - IS-IS level-2

www.china-ccie.com

114 159

ia - IS-IS inter area, * - candidate default, U - per-user static route

o - ODR, P - periodic downloaded static route

Gateway of last resort is not set

36.0.0.0/24 is subnetted, 1 subnets

C 36.1.1.0 is directly