R0106-HP MSR Router Series Layer 3 - IP Routing Configuration Guide(V7)

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Configuring MTR
Overview
Multi-Topology Routing (MTR) splits a base topology into multiple topologies, which 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 110 Work mechanism of MTR
As shown in Figure 110, the 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, no direct link exists between Router A and Router
D and between Router B and Router C. 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."
Configuring MTR
MTR classifies traffic by MTR policy. An MTR policy uses ACL, DSCP value, and IP precedence as the
match criteria.