Configuring Vrf-Aware Services - Cisco Catalyst 4500 series Administration Manual

Configuring VRF-lite for IPv4

Configuring VRF-Aware Services

IP services can be configured on global interfaces and within the global routing instance. IP services are
enhanced to run on multiple routing instances; they are VRF-aware. Any configured VRF in the system
can be specified for a VRF-aware service.
VRF-aware services are implemented in platform-independent modules. VRF provides multiple routing
instances in Cisco IOS. Each platform has its own limit on the number of VRFs it supports.
VRF-aware services have the following characteristics:
•
•
Configuring the User Interface for ARP
To configure VRF-aware services for ARP, perform this task:
Command
Switch# show ip arp vrf vrf-name
Switch(config)# arp vrf vrf-name
ip-address mac-address ARPA
Configuring Per-VRF for TACACS+ Servers
The per-VRF for TACACS+ servers feature enables you to configure per-virtual route forwarding
(per-VRF) authentication, authorization, and accounting (AAA) on TACACS+ servers.
Before configuring per-VRF on a TACACS+ server, you must have configured AAA and a server group.
You can create the VRF routing table (shown in Steps 3 and 4) and configure the interface (Steps 6, 7,
and 8). The actual configuration of per-VRF on a TACACS+ server is done in Steps 10 through 13.
.
Command or Action
Step 1
Switch> enable
Step 2
Switch# configure terminal
Step 3
Switch(config)# ip vrf vrf-name
Step 4
Switch (config-vrf)# rd route-distinguisher
Step 5
Switch (config-vrf)# exit
Step 6
Switch (config)# interface interface-name
Step 7
Switch (config-if)# ip vrf forwarding vrf-name
Step 8
Switch (config-if)# ip address ip-address mask
[secondary]
Step 9
Switch (config-if)# exit
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
41-6
The user can ping a host in a user-specified VRF.
ARP entries are learned in separate VRFs. The user can display Address Resolution Protocol (ARP)
entries for specific VRFs.
Purpose
Displays the ARP table (static and dynamic entries) in the specified
VRF.
Creates a static ARP entry in the specified VRF.
Purpose
Enables privileged EXEC mode.
Enter your password if prompted.
Enters global configuration mode.
Configures a VRF table and enters VRF configuration mode.
Creates routing and forwarding tables for a VRF instance.
Exits VRF configuration mode.
Configures an interface and enters interface configuration
mode.
Configures a VRF for the interface.
Sets a primary or secondary IP address for an interface.
Exits interface configuration mode.
Chapter 41 Configuring VRF-lite
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