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Configuring Multitopology Routing
• To check the MPLS forwarding status, use show mpls forwarding command:
Configuring Multitopology Routing
This set of procedures configures multitopology routing, which is used by PIM for reverse-path forwarding
(RPF) path selection.
• "Configuring a Global Topology and Associating It with an Interface" (required)
• "Enabling an IS-IS Topology" (required)
• "Placing an Interface in a Topology in IS-IS" (required)
• "Configuring a Routing Policy" (required)
For an example of multitopology routing, see
Restrictions for Configuring Multitopology Routing
• Only the default VRF is currently supported in a multitopology solution.
• Only protocol-independent multicast (PIM) and intermediate system-intermediate system (IS-IS) routing
• Topology selection is restricted solely to (S, G) route sources for both SM and SSM. Static and IS-IS
Cisco IOS XR Multicast Configuration Guide for the Cisco CRS Router, Release 5.2.x
116
Outgoing Interface List
Serial0/2/2/0/1:1.16 Flags: F NS, Up: 04:08:30
(*,225.0.32.4) RPF nbr: 102.0.0.102 Flags: C
Up: 04:08:30
Incoming Interface List
LmdtA1/MIPMSI Flags: A LMI, Up: 04:08:30
Outgoing Interface List
Serial0/2/2/0/1:1.16 Flags: F NS, Up: 04:08:30
Router# show mpls forwarding
Local
Outgoing
Prefix
Label
Label
or ID
------ ----------- ------------------ ------------ --------------- ------------
16000
16255
MLDP LSM ID: 0x1
16001
16254
MLDP LSM ID: 0x3
16002
16253
MLDP LSM ID: 0x5
16003
16252
MLDP LSM ID: 0x7
16004
16251
MLDP LSM ID: 0x9
16005
16250
MLDP LSM ID: 0xb
For information, see Cisco IOS XR Routing Configuration Guide for the Cisco CRS Router.
For information, see Cisco IOS XR Routing Configuration Guide for the Cisco CRS Router.
For information, see Cisco IOS XR Routing Configuration Guide for the Cisco CRS Router.
For information, see Cisco IOS XR Routing Configuration Guide for the Cisco CRS Router.
protocols are currently supported.
are the only interior gateway protocols (IGPs) that support multitopology deployment.
For non-(S, G) route sources like a rendezvous point or bootstrap router (BSR), or when a route policy
is not configured, the current policy default remains in effect. In other words, either a unicast-default or
multicast-default table is selected for all sources based on any of the following configurations:
Implementing Multicast Routing on Cisco IOS XR Software
Outgoing
Next Hop
Interface
Gi0/2/0/3
11.113.1.2
Gi0/2/0/3
11.113.1.2
Gi0/2/0/3
11.113.1.2
Gi0/2/0/3
11.113.1.2
Gi0/2/0/3
11.113.1.2
Gi0/2/0/3
11.113.1.2
Configuring Multitopology Routing: Example, on page
Bytes
Switched
348727240
348727234
348727234
348727234
421876882
348726916
159.
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