Configuring Multitopology Routing
• Topology selection is restricted solely to (S, G) route sources for both SM and SSM. Static and IS-IS
Although both multicast and unicast keywords are available when using the address-family {ipv4 |
Note
ipv6} command in routing policy language (RPL), only topologies under multicast SAFI can be configured
globally.
Information About Multitopology Routing
Configuring multitopology networks requires the following tasks:
Configuring a Global Topology and Associating It with an Interface
Follow these steps to enable a global topology in the default VRF and to enable its use with a specific interface.
SUMMARY STEPS
1. configure
2. address-family { ipv4 | ipv6 } multicast topology topo-name
3. maximum prefix limit
4. interface type interface-path-id
5. address-family { ipv4 | ipv6 } multicast topology topo-name
6. Repeat Step 4 and Step 5 until you have specified all the interface instances you want to associate with
your topologies.
7. commit
DETAILED STEPS
Command or Action
Step 1
configure
Step 2
address-family { ipv4 | ipv6 } multicast topology topo-name
Example:
RP/0/RSP0/CPU0:router(config)# address-family ipv4
multicast topology green
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.3.x
360
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 OSFP/IS-IS/Multiprotocol Border Gateway
Protocol (MBGP) configuration.
Purpose
Configures a topology in the default VRF table that
will be associated with a an interface.
Implementing IS-IS