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Configuring ATM
• Configuring ATM, page 1
• How to Configure ATM, page 2
• How to Configure Clear Channel ATM, page 18
• ATM Configuration Examples, page 21
• Monitoring and Maintaining the ATM Interface, page 24
• Additional References, page 25
Configuring ATM
ATM is not supported on the Cisco ASR 900 RSP3 module.Note
This chapter describes how to configure ATM on the Cisco ASR 903
Series Aggregation Services Routers.Effective Cisco IOS-XE Release
3.18, Clear Channel ATM is supported on Cisco ASR 900 RSP2 Module
.
this is for suppressing.
Information About Configuring ATM Interface
ATM InterfaceAsynchronous Transfer Mode (ATM) uses one Virtual
Circuit (VC) to carry all traffic to the next hop address.Even with
VCmultiplexing, a single VC carries all traffic of the same
protocol to the next hop address. ThoughWeighted Random Early
Discard (Per-VC (D)WRED) and WFQ can classify and prioritize the
packets, theyall share one single Quality of Service (QoS) VC.
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If you have configured ATM on any IM and and you perform a
IMOIR, then the standby RSP is reloaded.This is applicable to RSP1
and RSP2 Modules.
Note
Restrictions for Clear Channel ATM• Operation, Administration,
and Maintenance (OAM) is not supported.
• Access Circuit Redundancy (ACR) is not supported.
• Automatic Protection Switching (APS) is not supported.
• Optical Carrier level 12 (OC-12) mode is not supported.
• Clear Channel ATM is not supported for layer 3 on the
routers.
Information About Clear Channel ATMWhen the clear channel ATM
feature is enabled, the entire payload rate over Synchronous
Optical Network(SONET) or the Synchronous Digital Hierarchy (SDH)
line is used as a single flow of cells or packets. AnSTS-3c/VC4
container is used to represent the OC-3/STM-1 concatenation types
(OC-3 clear channels). Upto four OC-3/STM-1 are supported.
Clear channel ATM supports the following Layer 1 features:
• Framing configuration between SONET and SDH
• Local (diagnostic) and line (network) loopback
• Alarm detection and reporting capabilities
• System, local and line timing options
Effective Cisco IOS-XE Release 3.18, Clear Channel ATM on
OC-3/STM-1 is supported on Cisco ASR 900RSP2 Module .
Clear channel ATM Pseudowire supports the following Layer 2
features:
• Permanent Virtual Path (PVP)For configuration examples, see
the "Configuring Pseudowire" chapter.
• QoS experimental bits (Exp) marking on ATM Layer 2
interfacesFor configuration examples, see the "Configuring
Pseudowire: chapter.
How to Configure ATMThis section explains how to configure ATM
on T1, E1, OC-3, and OC-12 interfaces.
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Configuring ATMRestrictions for Clear Channel ATM
configuring__pseudowire.pdf#unique_13configuring__pseudowire.pdf#unique_13
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Configuring ATM on a T1 or E1 ControllerTo configure ATM on a T1
or E1 controller, follow these steps:
SUMMARY STEPS
1. configure terminal2. card type {t1 | e1} slot subslot3.
controller t1 slot/subslot/port4. framing esf5. linecode b8zs6.
cablelength long db-loss-value7. atm8. exit9. interface atm
slot/subslot/port10. no ip address11. no atm enable-ilmi-trap12.
interface atm slot/subslot/port.subinterface point-to-point13. pvc
vpi/vci l2transport14. encapsulation aal515. xconnect
peer-router-id vcid encapsulation mpls
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:Router# configure terminal
Step 1
Specifies the slot and subslot number of the T1 orE1
interface.
card type {t1 | e1} slot subslot
Example:Router(config)# card type t1 0 1
Step 2
Enters controller configuration mode to configurethe T1
interface.
controller t1 slot/subslot/port
Example:Router(config)# controller t1 0/1/0
Step 3
Selects the framing type as Extended Super Frame.framing esf
Example:Router(config-controller)# framing esf
Step 4
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PurposeCommand or Action
Selects the linecode type as binary 8-zerosubstitution
(B8ZS).
linecode b8zs
Example:Router(config-controller)# linecode b8zs
Step 5
Number of decibels by which the transmit signal isdecreased.
cablelength long db-loss-value
Example:Router(config-controller)# cablelength long 0db
Step 6
Configures the interface for ATM.atm
Example:Router(config-controller)# atm
Step 7
Enters global configuration mode.exit
Example:Router(config-controller)# exit
Step 8
Specifies the ATM interface.interface atm slot/subslot/port
Example:Router(config)# interface ATM 0/1/0
Step 9
Removes the interface IP address.no ip address
Example:Router(config-if)# no ip address
Step 10
Disables Integrated Local Management Interfacetraps.
no atm enable-ilmi-trap
Example:Router(config-if)# atm enable-ilmi-trap
Step 11
Enters subinterface configuration mode and createsa
point-to-point subinterface.
interface atm slot/subslot/port.subinterface point-to-point
Example:Router(config)# interface atm 0/1/1.1 point-to-point
Step 12
Assigns a VPI and virtual channel identifier (VCI).pvc vpi/vci
l2transport
Example:Router(config-subif)# pvc 10/100 l2transport
Step 13
Sets the encapsulation type as aal5.encapsulation aal5
Example:(cfg-if-atm-l2trans-pvc)# encapsulation aal5
Step 14
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PurposeCommand or Action
Binds the attachment circuit to a pseudowire VC.xconnect
peer-router-id vcid encapsulation mpls
Example:Router(cfg-if-atm-l2trans-pvc)# xconnect 10.1.2.31
encapsulation mpls
Step 15
Configuring ATM on OC-3 IM with SDH FramingTo configure ATM on
OC-3 interface module with SDH framing, perform these steps:
SUMMARY STEPS
1. configure terminal2. controller sonet slot/subslot/port3.
framing sdh4. aug mapping au-45. au-4 au-4-number tug-3
tug-3-number6. tug-2 tug-2-number e1 e1-line-number atm7. interface
ATM slot/subslot/port.au-4/tug-3/tug-2/e1.subint point-to-point8.
pvc vpi/vci l2transport9. encapsulation aal510. xconnect
remote-ip-address vc-id encapsulation mpls
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:Router# configure terminal
Step 1
Enters controller configuration mode to configureSDH.
controller sonet slot/subslot/port
Example:Router(config)#controller sonet 0/1/0
Step 2
Specifies the framing type as SDH.framing sdh
Example:Router(config-controller)#framing sdh
Step 3
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PurposeCommand or Action
Configures the AUG to be derived from AU-4.aug mapping au-4
Example:Router(config-controller)#aug mapping au-4
Step 4
Specifies the Administrative Unit type 4 (AU-4)and Tributary
Unit group type 3 (TUG-3) numbers.
au-4 au-4-number tug-3 tug-3-number
Example:Router(config-controller)#au-4 1 tug-3 1
Step 5
Creates an ATM group for the AU-4.tug-2 tug-2-number e1
e1-line-number atm
Example:Router(config-ctrlr-tug3)# tug-2 1 e1 1 atm
Step 6
Specifies the ATM interface as the point-to-pointinterface
type.
interface ATM
slot/subslot/port.au-4/tug-3/tug-2/e1.subintpoint-to-point
Example:Router(config)# interface ATM
0/1/0.1/1/1/1.1point-to-point
Step 7
Assigns a VPI and virtual channel identifier (VCI).pvc vpi/vci
l2transport
Example:Router(config-subif)#pvc 10/100 l2transport
Step 8
Sets the PVC encapsulation type to AAL5.encapsulation aal5
Example:Router(cfg-if-atm-vc)#encapsulation aal5
Step 9
Binds the attachment circuit to the ATM interfaceto create a
pseudowire.
xconnect remote-ip-address vc-id encapsulation mpls
Example:Router(cfg-if-atm-vc)#xconnect 10.1.1.101
100encapsulation mpls
Step 10
Configuring ATM on OC-3 IM with SONET FramingTo configure ATM on
OC-3 interface module with SONET framing, perform these steps:
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SUMMARY STEPS
1. configure terminal2. controller sonet slot/subslot/port3.
framing sonet4. sts-1 { 1 - 12 | 1 - 3 | 4 - 6 | 7 - 9 | 10 - 12}5.
vtg vtg_number t1 t1_line_number atm6. interface ATM
slot/subslot/port.sts-1/vtg/t1.subint.point-to-point7. pvc vpi/vci
l2transport8. encapsulation aal59. xconnect remote-ip-address vc-id
encapsulation mpls
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:Router# configure terminal
Step 1
Enters controller configuration mode to configureSONET.
controller sonet slot/subslot/port
Example:Router(config)#controller sonet 0/1/0
Step 2
Specifies the framing type as SONET.framing sonet
Example:Router(config-controller)# framing sonet
Step 3
Configures the Synchronous Transport Signal (STS)(level)-1 in
the SONET hierarchy. For OC-3 interfaces,this value is 1.
The 1-12 value is supported only in OC-12mode.
Note
sts-1 { 1 - 12 | 1 - 3 | 4 - 6 | 7 - 9 | 10 - 12}
Example:Router(config-controller)# sts-1 1
Step 4
Configures the T1 on the VTG . For SONET framing,values are 1 to
7
vtg vtg_number t1 t1_line_number atm
Example:Router(config-ctrlr-sts)# vtg 1 t1 1 atm
Step 5
Specifies the ATM interface as the point-to-pointinterface
type.
interface
ATMslot/subslot/port.sts-1/vtg/t1.subint.point-to-point
Example:Router(config)# interface ATM
0/1/0.1/1/1.1point-to-point
Step 6
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PurposeCommand or Action
Assigns a VPI and virtual channel identifier (VCI).pvc vpi/vci
l2transport
Example:Router(config-subif)#pvc 10/100 l2transport
Step 7
Sets the PVC encapsulation type to AAL5.encapsulation aal5
Example:Router(cfg-if-atm-vc)#encapsulation aal5
Step 8
Binds the attachment circuit to the ATM interface tocreate a
pseudowire.
xconnect remote-ip-address vc-id encapsulation mpls
Example:Router(cfg-if-atm-vc)#xconnect 10.1.1.101
100encapsulation mpls
Step 9
Enabling Configuring the ATM Interface on OC-3 IMThis section
describes how to configure an ATM interface.
Perform the following task to enable the ATM interface:
SUMMARY STEPS
1. configure terminal2. interface atm
slot/subslot/port.subport3. no shutdown
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode from the terminal.configure
terminalStep 1
Specifies the ATM interface using the appropriate format of the
interface atmcommand.
interface atmslot/subslot/port.subport
Example:interface atm 0/5/0.1/1/1.1
Step 2
Changes the shutdown state to up and enables the ATM interface,
therebybeginning the segmentation and reassembly (SAR) operation on
the interface.
no shutdownStep 3
• The no shutdown command passes an enable command to the
ATMinterface, which then begins segmentation and reassembly
(SAR)
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Configuring ATMEnabling Configuring the ATM Interface on OC-3
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PurposeCommand or Action
operations. It also causes the ATM interface to configure itself
based onthe previous configuration commands sent.
Configuring ATM Interface on TDM IMsTo configure ATM interface
on TDM IMs, follow these steps:
SUMMARY STEPS
1. configure terminal2. card type {t1 | e1} slot subslot3.
controller t1 slot/subslot/port4. atm5. exit6. interface atm
slot/subslot/port.subinterface point-to-point7. pvc vpi/vci
l2transport8. encapsulation aal59. xconnect peer-router-id vcid
encapsulation mpls
DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:Router# configure terminal
Step 1
Specifies the slot and subslot number of the T1 orE1
interface.
card type {t1 | e1} slot subslot
Example:Router(config)# card type t1 0 1
Step 2
Enters controller configuration mode to configurethe T1
interface.
controller t1 slot/subslot/port
Example:Router(config)# controller t1 0/1/0
Step 3
Configures the interface for ATM.atm
Example:Router(config-controller)# atm
Step 4
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PurposeCommand or Action
Enters global configuration mode.exit
Example:Router(config-controller)# exit
Step 5
Enters subinterface configuration mode and createsa
point-to-point subinterface.
interface atm slot/subslot/port.subinterface point-to-point
Example:Router(config)# interface atm 0/1/1.1 point-to-point
Step 6
Assigns a VPI and virtual channel identifier (VCI).pvc vpi/vci
l2transport
Example:Router(config-subif)# pvc 10/100 l2transport
Step 7
Sets the encapsulation type as aal5.encapsulation aal5
Example:(cfg-if-atm-l2trans-pvc)# encapsulation aal5
Step 8
Binds the attachment circuit to a pseudowire VC.xconnect
peer-router-id vcid encapsulation mpls
Example:Router(cfg-if-atm-l2trans-pvc)# xconnect 10.1.2.31
encapsulation mpls
Step 9
Configuring PVCsTo use a permanent virtual circuit (PVC), you
must configure the PVC into both the router and the ATMswitch. PVCs
remain active until the circuit is removed from either
configuration.
When a PVC is configured, all the configuration options are
passed on to the ATM interface. These PVCsare writable into the
nonvolatile RAM (NVRAM) as part of the Route Processor (RP)
configuration and areused when the RP image is reloaded.
Some ATM switches might have point-to-multipoint PVCs that do
the equivalent of broadcasting. If apoint-to-multipoint PVC exists,
then that PVC can be used as the sole broadcast PVC for all
multicast requests.
To configure a PVC, perform the tasks in the following
sections.
Creating a Permanent Virtual CircuitTo use a permanent virtual
circuit (PVC), configure the PVC in both the router and the ATM
switch. PVCsremain active until the circuit is removed from either
configuration. To create a PVC on the ATM interfaceand enter
interface ATM VC configuration mode, perform the following
procedure beginning in globalconfiguration mode:
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SUMMARY STEPS
1. Device(config)# interface atm slot/subslot/port
[.subinterface-number {multipoint | point-to-point}]2.
Device(config-if)# pvc [name ] vpi /vci3. Device(config-if-atm-vc)#
protocol protocol {protocol-address | inarp} [[no] broadcast]4.
Device(config-if-atm-vc)# inarp minutes5. Device(config-if-atm-vc)#
encapsulation {aal5snap}6. Device(config-if-atm-vc)# end
DETAILED STEPS
PurposeCommand or Action
Enters subinterface configuration mode for the specified port on
the ATM InterfaceModule (IM), where:
Device(config)# interface atmslot/subslot/port
Step 1
[.subinterface-number {multipoint| point-to-point}] •
slot—Specifies the chassis slot number in the Cisco ASR 903 Series
Router
where the SIP is installed.
• subslot—Specifies the secondary slot of the SIP where the IM
is installed.
• port—Specifies the number of the individual interface port on
an IM.
• subinterface—Specifies the number of the subinterface.
Configures a new ATM PVC by assigning its VPI/VCI numbers and
enters ATMVC configuration mode. The valid values for vpi /vci
are:
Device(config-if)# pvc [name ] vpi/vci
Step 2
• name—(Optional) An arbitrary string that identifies this
PVC.
• vpi—Specifies the VPI ID. The valid range is 0 to 255.
• vci—Specifies the VCI ID. The valid range is 32 to 65535.
Values 1 to 31 arereserved and should not be used, except for 5 for
the QSAAL PVC and 16 forthe ILMI PVC. ILMI is unsupported on the
Cisco ASR 903 Series Routers.
When using the pvc command, remember that the vpi /vci
combination formsa unique identifier for the interface and all of
its subinterfaces. If you specifya vpi /vci combination that has
been used on another subinterface, the CiscoIOS software assumes
that you want to modify that PVC’s configuration andautomatically
switches to its parent subinterface.
Note
Configures the PVC for a particular protocol andmaps it to a
specific protocol-addressDevice(config-if-atm-vc)#protocolprotocol
{protocol-address |inarp} [[no] broadcast]
Step 3
.
• protocol—Typically set to ipor pppoe, but other values are
possible.Example:
PPP is not supported on the Cisco ASR 903 Series
Routers.Note
• protocol-address—Destination address or virtual interface
template for thisPVC (if appropriate for the protocol ).
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PurposeCommand or Action
• inarp—Specifies that the PVC uses Inverse ARP to determine its
address.
• [no] broadcast—(Optional) Specifies that this mapping should
(or should not)be used for broadcast packets.
(Optional) If using Inverse ARP, configures how often the PVC
transmits InverseARP requests to confirm its address mapping. The
valid range is 1 to 60 minutes,with a default of 15 minutes.
Device(config-if-atm-vc)# inarpminutes
Step 4
(Optional) Configures the ATM adaptation layer (AAL) and
encapsulation type.Device(config-if-atm-vc)#encapsulation
{aal5snap}
Step 5
Exits ATM VC configuration mode and returns to privileged EXEC
mode.Device(config-if-atm-vc)# endStep 6
Verifying a Multipoint PVC ConfigurationTo verify the
configuration of a particular PVC, use the show atm pvc
command:
Device# show atm pvc 1/120
ATM3/1/0.120: VCD: 1, VPI: 1, VCI: 120UBR, PeakRate:
149760AAL5-LLC/SNAP, etype:0x0, Flags: 0xC20, VCmode: 0x0OAM
frequency: 0 second(s), OAM retry frequency: 1 second(s)OAM up
retry count: 3, OAM down retry count: 5OAM Loopback status: OAM
DisabledOAM VC status: Not ManagedILMI VC status: Not ManagedInARP
frequency: 15 minutes(s)Transmit priority 3InPkts: 1394964,
OutPkts: 1395069, InBytes: 1833119, OutBytes: 1838799InPRoc: 1,
OutPRoc: 1, Broadcasts: 0InFast: 0, OutFast: 0, InAS: 94964, OutAS:
95062InPktDrops: 0, OutPktDrops: 0CrcErrors: 0, SarTimeOuts: 0,
OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0Out CLP=1 Pkts:
0OAM cells received: 0F5 InEndloop: 0, F5 InSegloop: 0, F5 InAIS:
0, F5 InRDI: 0F4 InEndloop: 0, F4 InSegloop: 0, F4 InAIS: 0, F4
InRDI: 0OAM cells sent: 0F5 OutEndloop: 0, F5 OutSegloop: 0, F5
OutRDI: 0F4 OutEndloop: 0, F4 OutSegloop: 0, F4 OutRDI: 0OAM cell
drops: 0Status: UP
To verify the configuration and current status of all PVCs on a
particular interface, you can also use theshow atm vc interface
command.
Note
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Mapping a Protocol Address to a PVCThe ATM interface supports a
static mapping scheme that identifies the network address of remote
hosts orrouters. This section describes how to map a PVC to an
address, which is a required task for configuring aPVC.
If you enable or disable broadcasting directly on a PVC using
the protocol command, this configurationwill take precedence over
any direct configuration using the broadcast command.
Note
See examples of PVC configurations in the section "ATM
Configuration Examples, on page 21".
To map a protocol address to a PVC, use the following command in
interface-ATM-VC configuration mode:
PurposeCommand
Maps a protocol address to a PVC.Router(config-if-atm-vc)#
protocol protocolprotocol-address [[no] broadcast]
Configuring the AAL and Encapsulation TypeTo configure the ATM
adaptation layer (AAL) and encapsulation type, use the following
command beginningin interface-ATM-VC configuration mode:
PurposeCommand
Configures the ATM adaptation layer (AAL) andencapsulation
type.
• For a list of AAL types and encapsulationssupported for the
aal-encap argument, refer tothe encapsulation aal5 command in the
"ATMCommands" chapter of the Cisco IOSWide-Area Networking Command
Reference.The global default is AAL5 with SNAPencapsulation.
Router(config-if-atm-vc)# encapsulation aal5encap
Configuring PVC Traffic ParametersThe supported traffic
parameters are part of the following service categories: Constant
Bit Rate (CBR),Unspecified Bit Rate (UBR), Variable Bit Rate Non
Real-Time (VBR-NRT), and real-time Variable Bit Rate(VBR). Only one
of these categories can be specified per PVC connection so if a new
one is entered, it willreplace the existing one.
The -pcr and -mcr arguments are the peak cell rate and minimum
cell rate, respectively. The -scr and -mbsarguments are the
sustainable cell rate and maximum burst size, respectively.
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To configure PVC traffic parameters, use one of the following
commands beginning in interface-ATM-VCconfiguration mode:
PurposeCommand
Configures the Constant Bit Rate (CBR).Router(config-if-atm-vc)#
cbrpeak_cell_rate_KBPS
Configures the Unspecified Bit Rate
(UBR).Router(config-if-atm-vc)# ubr output-pcr
Configures the Variable Bit Rate-Non Real Time(VBR-NRT)
QOS.Router(config-if-atm-vc)# vbr-nrt output-pcr
output-scr output-mbs
Configures the real-time Variable Bit Rate (VBR).(Cisco MC3810
and Multiport T1/E1 ATM NetworkModule only.)
Router(config-if-atm-vc)# vbr-rt peak-rateaverage-rate burst
Enabling Inverse ARPInverse ARP is enabled by default when you
create a PVC using the pvc command. Once configured, aprotocol
mapping between an ATM PVC and a network address is learned
dynamically as a result of theexchange of ATM Inverse ARP
packets.
Inverse ARP is supported on PVCs running IP or IPX and no static
map is configured. If a static map isconfigured, Inverse ARP will
be disabled.
When PVC discovery is enabled on an active PVC and the router
terminates that PVC, the PVC will generatean ATM Inverse ARP
request. This allows the PVC to resolve its own network addresses
without configuringa static map.
Address mappings learned through Inverse ARP are aged out.
However, mappings are refreshed periodically.This period is
configurable using the inarp command, which has a default of 15
minutes.
You can also enable Inverse ARP using the protocol command. This
is necessary only if you disabled InverseARP using the no protocol
command. For more information about this command, refer to the
"ATMCommands" chapter in the Cisco IOS Asynchronous Transfer Mode
Command Reference.
For an example of configuring Inverse ARP, see the section
"Example Enabling Inverse ARP" at the end ofthis chapter.
To enable Inverse ARP on an ATM PVC, use the following commands
beginning in global configurationmode:
SUMMARY STEPS
1. interface atm slot/subslot/port.subinterface {multipoint |
point-to-point}2. pvc [name] vpi / vci3. encapsulation aal5snap4.
inarp minutes
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DETAILED STEPS
PurposeCommand or Action
Specifies the ATM interface using the appropriate format ofthe
interface atm command.1
interface atm slot/subslot/port.subinterface{multipoint |
point-to-point}
Example:Router(config)# interface atm 0/5/0.1/1/1/1.1{multipoint
| point-to-point}
Step 1
Specifies an ATM PVC by name (optional) and VPI/VCInumbers.
pvc [name] vpi / vciStep 2
Configures AAL5 LLC-SNAP encapsulation if it is notalready
configured.
encapsulation aal5snapStep 3
(Optional) Adjusts the Inverse ARP time period.inarp minutesStep
4
1 To determine the correct form of the interface atm command,
consult your ATM network module, port adapter, or router
documentation.
Configuring Broadcast on a PVCTo send duplicate broadcast
packets for all protocols configured on a PVC, use the following
command ininterface-ATM-VC configuration mode:
If you enable or disable broadcasting directly on a PVC using
the protocol command, this configurationwill take precedence over
any direct configuration using the broadcast command.
Note
PurposeCommand
Sends duplicate broadcast packets for all protocolsconfigured on
a PVC.Router(config-if-atm-vc)# broadcast
Configuring a PVC on a Multipoint SubinterfaceCreating a
multipoint subinterface allows you to create a point-to-multipoint
PVC that can be used as abroadcast PVC for all multicast requests.
To create a PVC on a multipoint subinterface, use the
followingprocedure beginning in global configuration mode:
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SUMMARY STEPS
1. Router(config)# interface atm
slot/subslot/port.subinterfacemultipoint2. Router(config-subif)# ip
address address mask3. Router(config-subif)# no ip
directed-broadcast4. Router(config-subif)# pvc [name ] vpi /vci5.
Router(config-if-atm-vc)# protocol protocol {protocol-address |
inarp} broadcast6. Router(config-if-atm-vc)# inarp minutes7.
Router(config-if-atm-vc)# encapsulation{aal5snap}8.
Router(config-if-atm-vc)# end
DETAILED STEPS
PurposeCommand or Action
Creates the specified point-to-multipoint subinterface on the
given port on thespecified ATM SPA, and enters subinterface
configuration mode, where:
Router(config)# interface
atmslot/subslot/port.subinterfacemultipoint
Step 1
• slot—Specifies the chassis slot number in the Cisco ASR 903
Series Routerwhere the SIP is installed.
• subslot—Specifies the secondary slot of the SIP where the SPA
is installed.
• port—Specifies the number of the individual interface port on
a SPA.
• subinterface—Specifies the number of the subinterface.
Assigns the specified IP address and subnet mask to this
subinterface.Router(config-subif)# ip addressaddress mask
Step 2
(Optional) Disables the forwarding of IP directed broadcasts,
which are sometimesused in denial of service (DOS) attacks.
Router(config-subif)# no ipdirected-broadcast
Step 3
Configures a new ATM PVC by assigning its VPI/VCI numbers and
enters ATMVC configuration mode. The valid values for vpi /vci
are:
Router(config-subif)# pvc [name] vpi /vci
Step 4
• name—(Optional) An arbitrary string that identifies this
PVC.
• vpi—Specifies the VPI ID. The valid range is 0 to 255.
• vci—Specifies the VCI ID. The valid range is 32 to 65535.
Values 1 to 31 arereserved and should not be used, except for 5 for
the QSAAL PVC and 16 forthe ILMI PVC. ILMI is unsupported on the
Cisco ASR 903 Series Routers.
When using the pvc command, remember that the vpi /vci
combinationforms a unique identifier for the interface and all of
its subinterfaces. If youspecify a vpi /vci combination that has
been used on another subinterface,the Cisco IOS XE software assumes
that you want to modify that PVC’sconfiguration and automatically
switches to its parent subinterface.
Note
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Configuring ATMConfiguring PVCs
-
PurposeCommand or Action
Configures the PVC for a particular protocol andmaps it to a
specific protocol-address.
Router(config-if-atm-vc)#protocolprotocol {protocol-address
|inarp} broadcast
Step 5
• protocol—Typically set to ipor pppoe, but other values are
possible.PPP is not supported on the Cisco ASR 903
SeriesRouters
Note
• protocol-address—Destination address or virtual template
interface for thisPVC (if appropriate for the protocol ).
• inarp—Specifies that the PVC uses Inverse ARP to determine its
address.
• broadcast— Specifies that this mapping should be used for
multicast packets.
(Optional) If using Inverse ARP, configures how often the PVC
transmits InverseARP requests to confirm its address mapping. The
valid range is 1 to 60 minutes,with a default of 15 minutes.
Router(config-if-atm-vc)# inarpminutes
Step 6
(Optional) Configures the ATM adaptation layer (AAL) and
encapsulation
type.Router(config-if-atm-vc)#encapsulation{aal5snap}
Step 7
Repeat Step 1 through Step 7 for each multipoint subinterface to
beconfigured on this ATM SPA.
Note
Exits interface configuration mode and returns to privileged
EXEC mode.Router(config-if-atm-vc)# endStep 8
Customizing the ATM InterfaceYou can customize the ATM
interface. The features you can customize have default values that
will mostlikely suit your environment and probably need not be
changed. However, youmight need to enter configurationcommands,
depending upon the requirements for your system configuration and
the protocols you plan toroute on the interface.
Configuring MTU SizeEach interface has a default maximum packet
size or maximum transmission unit (MTU) size. For ATMinterfaces,
this number defaults to 4470 bytes.
To set the maximum MTU size, use the following command in
interface configuration mode:
PurposeCommand
Sets the maximum MTU size on the subinterface.
The MTU size can be changed for an ATMLayer 3 subinterface
only.
NoteRouter(config-subif)# mtu bytes
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Configuring ATMCustomizing the ATM Interface
-
How to Configure Clear Channel ATMThis section explains how to
configure clear channel ATM on an OC-3 IM.
Configuring Clear Channel ATM on OC-3 IM with SONET FramingTo
configure ATM on an OC-3 IM with SONET framing, perform these
steps:
SUMMARY STEPS
1. configure terminal2. controller sonet slot/subslot/port3.
framing sonet4. sts-1 sts-identifier atm5. interface ATM
slot/subslot/port:sts-1-num6. pvc vpi/vci l2transport7.
encapsulation aal58. xconnect remote-ip-address vc-id encapsulation
mpls
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure terminal
Example:Router# configure terminal
Step 1
Enters controller configuration mode to configure
SONET.controller sonet slot/subslot/port
Example:Router(config)#controller sonet 0/1/0
Step 2
• slot/subslot/port—Specifies the location of the controller.For
OC-3, valid ports are from 0 to 3.
Specifies the framing type as SONET.framing sonet
Example:Router(config-controller)# framing sonet
Step 3
Configures Synchronous Transport Signal (STS) (level)-1 inthe
SONET hierarchy.
sts-1 sts-identifier atm
Example:Router(config-controller)# sts-1 1 - 3 atm
Step 4
• sts-1— Specifies the SONET STS level.
• sts-identifier—For OC-3, valid sts-identifier is from 1to
3.
• atm—Specifies clear channel ATM mode for STS.
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Configuring ATMHow to Configure Clear Channel ATM
-
PurposeCommand or Action
Enters clear channel ATM mode.interface ATM
slot/subslot/port:sts-1-num
Example:
Step 5
• slot/subslot/port:sts-1-num—Specifies the location ofthe clear
channel ATM.
(for main interface)Router(config-controller)# interface
ATM0/1/0:1
(for sub-interface)Router(config-controller)# interface
ATM0/1/0:1.1 point-to-point
Assigns a virtual path identifier (VPI) and virtual
channelidentifier (VCI).
pvc vpi/vci l2transport
Example:Router(config-subif)#pvc 10/100 l2transport
Step 6
• vpi/vci—Specifies VPI and VCI.
• l2transport—Specifies that the PVC is a switched PVCinstead of
a terminated PVC.
Sets the PVC encapsulation type to AAL5.encapsulation aal5
Example:Router(cfg-if-atm-l2trans-pvc)#encapsulationaal5
Step 7
Binds the attachment circuit to the ATM interface to create
apseudowire.
xconnect remote-ip-address vc-id encapsulationmpls
Example:Router(cfg-if-atm-l2trans-pvc)#xconnect10.1.1.101 100
encapsulation mpls
Step 8
Configuring Clear Channel ATM in OC-3 Mode with SDH FramingTo
configure clear channel ATM in OC-3 mode with SDH framing, perform
these steps:
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Release 3S (ASR 900 Series Routers) 19
Configuring ATMConfiguring Clear Channel ATM in OC-3 Mode with
SDH Framing
-
SUMMARY STEPS
1. configure terminal2. controller sonet slot/subslot/port3.
framing sdh4. aug mapping au-45. au-4 au-4-number atm6. interface
ATM slot/subslot/port:au-4-num.subint point-to-point7. pvc vpi/vci
l2transport8. encapsulation aal59. xconnect remote-ip-address vc-id
encapsulation mpls
DETAILED STEPS
PurposeCommand or Action
Enters global configuration mode.configure terminal
Example:Router# configure terminal
Step 1
Enters controller configuration mode to configure SDH.controller
sonet slot/subslot/port
Example:Router(config)#controller sonet 0/1/0
Step 2
• slot/subslot/port—Specifies the location of thecontroller.
For OC-3, valid ports are from 0 to 3.
Specifies the framing type as SDH.framing sdh
Example:Router(config-controller)#framing sdh
Step 3
Configures the AUG to be derived from AU-4.aug mapping au-4
Example:Router(config-controller)#aug mapping au-4
Step 4
Specifies the Administrative Unit type 4 (AU-4) numbersand
enters clear channel ATM mode.
au-4 au-4-number atm
Example:Router(config-controller)#au-4 1 atm
Step 5
Specifies the ATM interface as the point-to-point
interfacetype.
interface ATM
slot/subslot/port:au-4-num.subintpoint-to-point
Example:Router(config-controller)# interface ATMATM0/1/0:1.1
point-to-point
Step 6
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Release 3S (ASR 900 Series Routers)20
Configuring ATMConfiguring Clear Channel ATM in OC-3 Mode with
SDH Framing
-
PurposeCommand or Action
Assigns a virtual path identifier (VPI) and virtual
channelidentifier (VCI).
pvc vpi/vci l2transport
Example:Router(config-subif)#pvc 10/100 l2transport
Step 7
• vpi/vci—Specifies VPI and VCI.
• l2transport—Specifies that the PVC is a switchedPVC instead of
a terminated PVC.
Sets the PVC encapsulation type to AAL5.encapsulation aal5
Example:Router(cfg-if-atm-l2trans-pvc)#encapsulationaal5
Step 8
Binds the attachment circuit to the ATM interface to createa
pseudowire.
xconnect remote-ip-address vc-id encapsulation mpls
Example:Router(cfg-if-atm-l2trans-pvc)#xconnect10.1.1.101 100
encapsulation mpls
Step 9
ATM Configuration ExamplesThe examples in the following sections
illustrate how to configure ATM for the features described in
thischapter. The examples below are presented in the same order as
the corresponding configuration task sections:
Example: Configuring Supported ATM Interface TypesThe following
example shows how to configure main ATM interface:
enableconfigure terminalinterface atm 0/0/0no shutdown
Example Creating a PVCThe following example shows how to create
a PVC on an ATM main interface with AAL5 encapsulationconfigured
and a VBR-NRT QOS specified.
interface 0/5/0.1/1/1/1 point-to-pointpvc 1/40encapsulation
aal5vbr-nrt 1000 500 50exit
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Release 3S (ASR 900 Series Routers) 21
Configuring ATMATM Configuration Examples
-
PVCs in a Fully Meshed Network ExampleThe figure below
illustrates a fully meshed network. The configurations for routers
A, B, and C follow thefigure. In this example, the routers are
configured to use PVCs. Fully meshed indicates that any
workstationcan communicate with any other workstation. Note that
the two protocol statements configured in router Aidentify the ATM
addresses of routers B and C. The two protocolstatements in router
B identify the ATMaddresses of routers A and C. The two protocol
statements in router C identify the ATM addresses of routersA and
B. For further information, refer to the sections “Creating a PVC”
and “Mapping a Protocol Address toa PVC”.
Figure 1: Fully Meshed ATM Configuration Example
Router A
ip routing!interface atm 0/5/0.1/1/1/1ip address 131.108.168.1
255.255.255.0pvc 0/32protocol ip 131.108.168.2 broadcastexit!pvc
0/33protocol ip 131.108.168.3 broadcastexit
Router B
ip routing!interface atm 0/5/0.1/1/1/1.1ip address 131.108.168.2
255.255.255.0pvc 0/32protocol ip 131.108.168.1 broadcastexit!pvc
0/34protocol ip 131.108.168.3 broadcastexit
Router C
ip routing!interface atm 0/5/0.1/1/1/1.1ip address 131.108.168.3
255.255.255.0pvc 0/33protocol ip 131.108.168.1 broadcast
Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE
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Configuring ATMPVCs in a Fully Meshed Network Example
-
exit!pvc 0/34protocol ip 131.108.168.2 broadcastexit
Enabling Inverse ARP ExampleThe following example shows how to
enable Inverse ARP on an ATM interface and specifies an Inverse
ARPtime period of 10 minutes.
interface atm 2/0/0.1pvc 1/32inarp 10exit
PVC on a Point-to-Point Subinterface Configuration
Exampleinterface ATM 0/0/0.9 point-to-pointmtu 4470bandwidth
34000ip vrf forwarding vrfexampleip address 192.0.2.1
255.255.255.0ip mtu 4470pvc 11/105ubr 38oam-pvc manageencapsulation
aal5snap!interface ATM 0/0/0.11 point-to-pointmtu 4470bandwidth
7000ip address 192.0.2.2 255.255.255.0ip mtu 4470pvc 100/50cbr
7000encapsulation aal5snapmax-reserved-bandwidth 100
Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE
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Configuring ATMEnabling Inverse ARP Example
-
Monitoring and Maintaining the ATM InterfaceAfter configuring an
ATM interface, you can display its status. You can also display the
current state of theATM network and connected virtual circuits. To
show current virtual circuits and traffic information, use
thefollowing commands in EXEC mode:
PurposeCommand
Displays entries in the ARP table.Router# show arp
Displays PVC parameter configurations andwhere the parameter
values are inherited from.Router# show atm class-links {vpi / vci |
name}
Displays ATM-specific information about theATM interface using
the appropriate format ofthe show atm interface atm command.2
Router# show atm interface atm slot /0
Router# show atm interface atm slot / port-adapter/0
Router# show atm interface atm number
Displays the list of all configured ATM staticmaps to remote
hosts on an ATM network.Router# show atm map
Displays all active ATM PVCs and trafficinformation.Router# show
atm pvc [vpi / vci | name | interface
atm interface_number]
Displays global traffic information to and fromall ATM networks
connected to the router and alist of counters of all ATM traffic on
this router.
Router# show atm traffic
Displays all active ATM virtual circuits (PVCs )and traffic
information.
The SVCs and the signalling keywordare not supported on the
Cisco ASR 903series routers.
Note
Router# show atm vc [vcd-number | [rangelower-limit-vcd
upper-limit-vcd] [interface ATMinterface-number] [detail [prefix
{vpi/vci | vcd |interface | vc_name}]] [connection-name]
|signalling [freed-svcs | [cast-type {p2mp | p2p}][detail]
[interface ATM interface-number]] |summary ATM
interface-number]
Displays statistics for the ATM interface usingthe appropriate
format of the show interfacesatm command.
Router# show interfaces
atmcontroller.port-channels.subinterface
Displays the clock signal sources and prioritiesthat you
established on the router.Router# show network-clocks
synchronization
2 To determine the correct form of the interface atm command,
consult your ATM network module, port adapter, or router
documentation.
Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE
Release 3S (ASR 900 Series Routers)24
Configuring ATMMonitoring and Maintaining the ATM Interface
-
Additional ReferencesRelated Documents
Document TitleRelated Topic
Cisco IOS Master Commands List, All ReleasesCisco IOS
commands
Cisco IOS Asynchronous Transfer Mode CommandReference
ATM commands
Standards
TitleStandard
--No new or modified standards are supported by thisfeature, and
support for existing standards has notbeen modified by this
feature.
MIBs
MIBs LinkMIB
To locate and downloadMIBs for selected platforms,Cisco IOSXE
software releases, and feature sets, useCisco MIB Locator found at
the following URL:
http://www.cisco.com/go/mibs
• Cisco PVC trap MIB -CISCO-IETF-ATM2-PVCTRAP-MIB
RFCs
TitleRFC
--No new or modified RFCs are supported by thisfeature, and
support for existing RFCs has not beenmodified by this feature.
Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE
Release 3S (ASR 900 Series Routers) 25
Configuring ATMAdditional References
http://www.cisco.com/en/US/docs/ios/mcl/allreleasemcl/all_book.htmlhttp://www.cisco.com/go/mibs
-
Technical Assistance
LinkDescription
http://www.cisco.com/techsupportThe Cisco Support website
provides extensive onlineresources, including documentation and
tools fortroubleshooting and resolving technical issues withCisco
products and technologies.
To receive security and technical information aboutyour
products, you can subscribe to various services,such as the Product
Alert Tool (accessed from FieldNotices), the Cisco Technical
Services Newsletter,and Really Simple Syndication (RSS) Feeds.
Access to most tools on the Cisco Support websiterequires a
Cisco.com user ID and password.
Asynchronous Transfer Mode Configuration Guide, Cisco IOS XE
Release 3S (ASR 900 Series Routers)26
Configuring ATMAdditional References
http://www.cisco.com/public/support/tac/home.shtml
Configuring ATMConfiguring ATMInformation About Configuring ATM
InterfaceATM Interface
Restrictions for Clear Channel ATMInformation About Clear
Channel ATM
How to Configure ATMConfiguring ATM on a T1 or E1
ControllerConfiguring ATM on OC-3 IM with SDH FramingConfiguring
ATM on OC-3 IM with SONET FramingEnabling Configuring the ATM
Interface on OC-3 IMConfiguring ATM Interface on TDM IMsConfiguring
PVCsCreating a Permanent Virtual CircuitVerifying a Multipoint PVC
ConfigurationMapping a Protocol Address to a PVCConfiguring the AAL
and Encapsulation TypeConfiguring PVC Traffic ParametersEnabling
Inverse ARPConfiguring Broadcast on a PVCConfiguring a PVC on a
Multipoint Subinterface
Customizing the ATM InterfaceConfiguring MTU Size
How to Configure Clear Channel ATMConfiguring Clear Channel ATM
on OC-3 IM with SONET FramingConfiguring Clear Channel ATM in OC-3
Mode with SDH Framing
ATM Configuration ExamplesExample: Configuring Supported ATM
Interface TypesExample Creating a PVCPVCs in a Fully Meshed Network
ExampleEnabling Inverse ARP ExamplePVC on a Point-to-Point
Subinterface Configuration Example
Monitoring and Maintaining the ATM InterfaceAdditional
References