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Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
Chapter 42 Configuring Policy-Based Routing
Policy-Based Routing Configuration Tasks
Enabling IPv6 PBR
Note With IOS XE 3.6.0E and IOS 15.2(2)E, IPv6 PBR is not supported on Supervisor Engine 8-E.
To enable PBR, you must create a route map that specifies the match criteria and the resulting action if
all of the match clauses are met. Then you must apply that route-map on a particular interface. All
packets arriving on the specified interface matching the match clauses are subject to PBR.
For IPv6 PBR to work on the Catalyst 4900M, Catalyst 4948E and Catalyst 4948E-F Series Switches,
IPv4 and IPv6 routing must be enabled the device.
To enable IPv6 PBR on an interface, perform this task:
Command Purpose
Step 1
Switch(config)# route-map map-tag [permit |
deny] [sequence-number]
Defines a route map to control where packets are sent. This
command puts the switch into route-map configuration mode.
Step 2
Switch(config-route-map)# match ipv6 address
{access-list-number | name}
[...access-list-number | name]
Specifies the match criteria. The match criteria take the form
of one or more Standard or Extended ipv6 access-lists. The
access-lists can specify the source and destination IP
addresses, protocol types, and port numbers.
Step 3
Switch(config-route-map)# set ipv6 next-hop
ip-address [... ip-address]
Specifies the next-hop IP address to which matching packets
are sent. The next-hop IP address specified here must belong
to a subnet that is directly connected to this switch.
If more than one next-hop IP address is specified, the first
usable next-hop is chosen for routing matching packets. If the
next-hop is (or becomes) unavailable for some reason, the
next one in the list is chosen.
Step 4
Switch(config-route-map)# set interface
interface-type interface-number
[... type number]
Specifies the output interface from which the packet will be
sent. This action specifies that the packet is forwarded out of
the local interface. The interface must be a Layer 3 interface
(not a switchport).
Packets are forwarded on the specified interface only if one of
the following conditions is met:
• The destination IP address in the packet lies within the IP
subnet to which the specified interface belongs.
• The destination IP address in the packet is reachable
through the specified interface (as per the IP routing
table).
If the destination IP address on the packet does not meet
either of these conditions, the packet is dropped. This action
forces matching packets to be switched in software.k
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