Cisco Cisco IOS Software Release 12.2(33)SRE

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Multi-Topology Routing (MTR) allows the configuration of service differentiation through class-based 
forwarding. MTR supports multiple unicast topologies and a separate multicast topology. A topology is 
a subset of the underlying network (or base topology) characterized by an independent set of Network 
Layer Reachability Information (NLRI). A topology can overlap with another or share any subset of the 
underlying network. MTR provides separate forwarding capabilities on a per topology basis. A separate 
forwarding table is maintained for each topology, allowing you to broadly apply independent forwarding 
configurations or add a level of granularity to independent forwarding configurations. MTR can be used, 
for example, to define separate topologies for voice, video, and data traffic classes. 

Your Cisco IOS software release may not support all of the features documented in this module. To reach 
links to specific feature documentation in this module and to see a list of the releases in which each feature is 
supported, use the 

.

Use Cisco Feature Navigator to find information about platform support and Cisco IOS and Catalyst OS 
software image support. To access Cisco Feature Navigator, go to 

. An 

account on Cisco.com is not required.