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Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
Chapter 29 Configuring IP Unicast Routing
Configuring Multi-VRF CE
Use the no router ospf process-id vrf vrf-name global configuration command to disassociate the VPN
forwarding table from the OSPF routing process.
Configuring BGP PE to CE Routing Sessions
Beginning in privileged EXEC mode, follow these steps to configure a BGP PE to CE routing session:
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.
Multi-VRF CE Configuration Example
Figure 29-9
is a simplified example of the physical connections in a network similar to that in
Figure 29-8
. OSPF is the protocol used in VPN1, VPN2, and the global network. BGP is used in the CE
to PE connections. The examples following the illustration show how to configure a Cisco ME 3400
switch as CE Switch A, and the VRF configuration for customer switches D and F. Commands for
configuring CE Switch C and the other customer switches are not included but would be similar. The
example also includes commands for configuring traffic to Switch A for a Catalyst 6000 or Catalyst 6500
switch acting as a PE router.
Step 6
end
Return to privileged EXEC mode.
Step 7
show ip ospf process-id
Verify the configuration of the OSPF network.
Step 8
copy running-config startup-config
(Optional) Save your entries in the configuration file.
Command
Purpose
Command
Purpose
Step 1
configure terminal
Enter global configuration mode.
Step 2
router bgp autonomous-system-number
Configure the BGP routing process with the AS number passed to other
BGP routers, and enter router configuration mode.
Step 3
network network-number mask
network-mask
Specify a network and mask to announce using BGP.
Step 4
redistribute ospf process-id match
internal
Set the switch to redistribute OSPF internal routes.
Step 5
network network-number area area-id
Define a network address and mask on which OSPF runs and the area
ID for that network address.
Step 6
address-family ipv4 vrf vrf-name
Define BGP parameters for PE to CE routing sessions, and enter VRF
address-family mode.
Step 7
neighbor address remote-as as-number
Define a BGP session between PE and CE routers.
Step 8
neighbor address activate
Activate the advertisement of the IPv4 address family.
Step 9
end
Return to privileged EXEC mode.
Step 10
show ip bgp [ipv4] [neighbors]
Verify BGP configuration.
Step 11
copy running-config startup-config
(Optional) Save your entries in the configuration file.
