Vrf-Lite Configuration Example - Cisco Catalyst 4500 series Administration Manual

Configuring VRF-lite for IPv4
Command
Step 6
Switch(config-router-af)#
address-family ipv4 vrf vrf-name
Step 7
Switch(config-router-af)# neighbor
address remote-as as-number
Step 8
Switch(config-router-af)# neighbor
address activate
Step 9
Switch(config-router-af)# end
Step 10
Switch# show ip bgp
Step 11
Switch# copy running-config
startup-config
Use the no router bgp autonomous-system-number global configuration command to delete the BGP
routing process. Use the command with keywords to delete routing characteristics.

VRF-lite Configuration Example

Figure 41-2
Figure
to PE connections. The example commands show how to configure the CE switch S8 and include the
VRF configuration for switches S20 and S11 and the PE router commands related to traffic with switch
S8. Commands for configuring the other switches are not included but would be similar.
Figure 41-2
Switch S20
Switch S10
Switch S11
Global network
Switch S16
Software Configuration Guide—Release IOS XE 3.6.0E and IOS 15.2(2)E
41-10
[ ] [
ipv4 neighbors
is a simplified example of the physical connections in a network similar to that in
41-1. OSPF is the protocol used in VPN1, VPN2, and the global network. BGP is used in the CE
VRF-lite Configuration Example
Catalyst 4500
VPN1
208.0.0.0
Fast
Ethernet
3/8
108.0.0.0
Fast
Ethernet
3/7
VPN2
118.0.0.0
Fast
Ethernet
3/11
168.0.0.0
Fast
Ethernet
3/3
Purpose
Defines BGP parameters for PE to CE routing sessions and
enters VRF address-family mode.
Defines a BGP session between PE and CE routers.
Activates the advertisement of the IPv4 address family.
Returns to privileged EXEC mode.
] Verifies BGP configuration.
(Optional) Saves your entries in the configuration file.
Switch S8
Router
Si
CE PE
Fast
Ethernet
3/5
CE = Customer edge device
PE = Provider edge router
Chapter 41 Configuring VRF-lite
Catalyst 4500
Switch S9
Si
Switch S13
Switch S14
CE
Global network
Switch S15
VPN1
VPN2
OL_28731-01