Bgp Lab Demo

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BGP LAB

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BGP configuration

1. enable router BGP

Router(config-router)# router bgp [AS NUBER]

2. neighbor configuration Router(config-router)# neighbor [peer address] remote-as [AS

NUMBER]

3 . Check the status

Router# Show ip bgp summary

Router# Show ip bgp

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LAB 1 – basic configuration

Confgure for IBG and EBGP

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LAB 2 ~ 4

Confgure for sending network block30.0.0.0/24

r1

r3

r2

20.0.0.0/24

AS 100

AS 200

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LAB 2 network command

Network configuration

Router(config-router)# network 30.0.0.0 Check status

Router# Show ip bgp summary

Router# Show ip bgp

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LAB 3 static redistribution

Delete network command

Configure static router Router(config)# ip route 30.0.0.0 255.255.255.0 null0

Redistribute static configuration

Router(config-router)# redistribute static

Check status Router# Show ip bgp summary

Router# Show ip bgp

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LAB 4 IGP redistribution

Delete static route

Configure isis level 1 for r1 and r3 Redistribiute ospf configuration

Router(config-router)# redistribute ospf 1 metric 100

Check status

Router# Show ip bgp summary Router# Show ip bgp

Router# Show ip bgp neighbor

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LAB 5 next-hop-self

30.0.0.0/24

r1

r3

r230.0.0.0/24

AS 100

AS 200

10.0.0.0/24

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LAB 5 next-hop-self

Configure BGP

Check next-hop in r2 Configure next-hop-self in r1

Router(config-router)# neighbor 30.0.0.2 next-hop-self

Check status

Router# Show ip bgp summary Router# Show ip bgp

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LAB 6 route-reflector

r1

r3AS 100

AS 200

10.0.0.0/24

r5

r4

r2

r6

Route-Reflector

AS 300

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LAB 6 route-reflector

Configure BGP in each routers in each AS

Configure Router-Reflector in r4 and r6 for each neighbor Neighbor x.x.x.x route-reflector-client

configure next-hop-self

Check status

Router# Show ip bgp neighbor

Router# Show ip bgp summary

Router# Show ip bgp

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LAB 7 confederation

r1

r3

AS 100 AS 200

10.0.0.0/24

r5

r4

r2

r6

AS 300

AS 65010AS 65020

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LAB 7 confederation Configure BGP in each routers in each AS

Check next-hop in r2

Configure confederation in each r4

Router(config)# router bgp 65010

Router(config-router)# bgp confederation identifier 300

Router(config-router)# neighbor <r3 ip address> remote-as 100

Router(config-router)# neighbor <r1 ip address> remote-as 65020

Configure confederation in each r1 Router(config)# router bgp 65010

Router(config-router)# bgp confederation identifier 300

Router(config-router)# bgp confederation peers 65020

Router(config-router)# neighbor <r4 ip address> remote-as 100 Router(config-router)# neighbor <r2 ip address> remote-as 65020

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LAB 8 loopback and multihop

r1

r230.0.0.0/24

AS 200

AS 100

30.0.0.0/24

Lo 10.0.0.1/32

Lo 20.0.0.1/32

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LAB 8 loopback and multihop

Configure loopback

Configure static for loopback interfaces connectivity Configure BGP

Check multihop in each router

Router(config-router)# neighbor 10.0.0.1 ebgp-multihop 2

Router(config-router)# neighbor 10.0.0.1 update-source lo0