R21xx-HP FlexFabric 11900 Layer 3 IP Routing Configuration Guide

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Configuring IPv6 PBR
Introduction to IPv6 PBR
Policy-based routing (PBR) uses user-defined policies to route packets. A policy can specify the next hop
and other parameters for packets that match specific criteria such as ACLs.
A device uses PBR to forward matching packets and uses the routing table to forward non-matching
packets. If PBR is not configured, the device uses the routing table to forward packets.
The device supports only interface PBR, which guides the forwarding of packets received on an interface
only.
Policy
An IPv6 policy includes match criteria and actions to be taken on the matching packets. A policy can
have one or multiple nodes as follows:
• Each node is identified by a node number. A smaller node number has a higher priority.
• A node comprises if-match and apply clauses. An if-match clause specifies a match criterion, and
an apply clause specifies an action.
• A node has a match mode of permit or deny.
An IPv6 policy matches nodes in priority order against packets. If a packet meets the match criteria on
a node, it is processed by the action on the node. Otherwise, it goes to the next node for a match. If the
packet does not match the criteria on any node, it is forwarded according to the routing table.
if-match clause
IPv6 PBR supports only the if-match acl clause, which sets an ACL match criterion.
You can specify only one if-match clause of each type for a node.
apply clause
IPv6 PBR supports only the apply next-hop clause, which sets the next hop for packets.
Relationship between the match mode and clauses on the node