Restrictions For Vrf-Aware Policy-Based Routing - Cisco Catalyst 4500 Series Software Configuration Manual

Chapter 42 Configuring Policy-Based Routing

Restrictions for VRF-Aware Policy-Based Routing

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Policy-Based Routing Configuration Tasks
To configure PBR, perform the tasks described in the following sections. The task in the first section is
required; the tasks in the remaining sections are optional. For configuration examples, see the
"Policy-Based Routing Configuration Examples" section on page
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Enabling IPv4 PBR
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.
The same route-map cannot be used to configure PBR:
on interfaces that belong to different VRFs
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on one VRF interface and another global interface (an interface that is not part of a VRF).
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The set vrf and set ip global next-hop commands can be configured with the set default interface,
set interface, set ip default next-hop, and set ip next-hop commands. But the set vrf and set ip
global next-hop commands take precedence over the set default interface, set interface, set ip
default next-hop, and set ip next-hop commands. No error message is displayed if you attempt to
configure the set vrf command with any of these three set commands.
The set global and set vrf commands cannot be simultaneously applied to a route map.
When you use the set vrf command you specify the VRF table to be looked-up; this overrides the
default or global routing table. If a route is not specified in the VRF routing table, then packets are
dropped (even if a route exists in the global routing table).
The set next-hop verify-availability command is not supported with VRF instances.
Enabling IPv4 PBR, page 42-7
Enabling IPv6 PBR, page 42-10
Enabling Local IPv4 and Local IPv6 PBR, page 42-12
Verifying Next-Hop IP using Object Tracking , page 42-14
Unsupported Commands, page 42-15
Configuring IPv4 and IPv6 PBR for VRF Instances, page 42-12
Unsupported Commands, page 42-15
Catalyst 4500 Series Switch, Cisco IOS Software Configuration Guide - Cisco IOS XE 3.9.xE and IOS 15.2(5)Ex
(Required)
(Required)
(Optional)
(Optional)
Policy-Based Routing Configuration Tasks
42-16.
(Optional)
(Optional)
42-7