Command Reference Guide

248 ● route-policy 3Com Router 5000 Family and Router 6000 Family
Command Reference
Description The policy of IP multicast policy routing is implemented by configuring route-policies.
Multiple route-policies can be configured on the router. Each route-policy may
contain multiple route-nodes. Different route-nodes in a route-policy are identified by
different integer sequence-numbers. In each route-node, set the conditions that
packets should match (that is, the match rule) with the
if-match command and
configure the forwarding actions to be executed to packets that meet the match
conditions with the
apply command.
The logical relation that filter the if-match clauses is “and”. This means that any
if-match clause passing the filter will cause others to be ignored.
Only the if-match acl clause is effective for multicast policy routing. The logical
relation between route-policy nodes is “or”. That is, one packet forwarded in one
policy node results in all the following nodes being ignored. If all permit nodes can
not succeed in matching with the features of packet or any deny node is matched,
the packet will then be forwarded or discarded normally, up to the route table.
When multicast policy routing is configured on an interface of a router, all multicast
packets entering the router on the interface will be filtered. The filter method is that
all policy nodes of the route-policy are applied in the ascending sequence of their ID(a
number).
Related Commands ■ if-match acl
■ apply output-interface (for Multicast Policy Routing)
■ apply ip-address next-hop (for Multicast Policy Routing)
■ display ip multicast-policy