R3303-HP 6600/HSR6600 Routers Layer 3 - IP Routing Configuration Guide

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Configuring MTR
MTR overview
Multi-Topology Routing (MTR) splits a base topology into multiple topologies, which might intersect or
overlap with one another. Route calculation is performed on a per-topology basis.
For example, IS-IS MTR splits an IS-IS routing domain into multiple independent IP topologies, such as an
IPv4 topology and an IPv6 topology. It enables IS-IS to perform separate route calculation in the IPv4 and
IPv6 topologies.
Work mechanism
Figure 121 Work mechanism of MTR
As shown in Figure 121, a base topology is split into two topologies, topology A and topology B. You can
forward voice traffic through topology A and video traffic through topology B.
Router B does not belong to topology A. In topology B, the links between Router A and Router D and
between Router B and Router C do not exist. Route calculation and traffic forwarding are performed in
each topology independently.
Supported features
• IS-IS MTR. For more information, see "Configuring IS-IS" and "Configuring IPv6 IS-IS."
• Static routing MTR. For more information, see "Configuring static routing."