Configuring Bgp Routing Sessions; Configuring Pe-To-Pe Routing Sessions - Cisco Catalyst 3750 Software Configuration Manual

Chapter 30 Configuring MPLS and EoMPLS

Configuring BGP Routing Sessions

Beginning in privileged EXEC mode, follow these steps on the PE router to configure BGP routing
sessions in a provider network:
Command
Step 1 configure terminal
Step 2
ip routing
Step 3
router bgp autonomous-system-number
Step 4
neighbor {ip-address | peer-group-name}
remote-as as-number
Step 5
neighbor ip-address activate
Step 6 end
Step 7 show ip bgp neighbor
Step 8
copy running-config startup-config
Use the no router bgp autonomous-system global configuration command to delete the BGP routing
session.

Configuring PE-to-PE Routing Sessions

Beginning in privileged EXEC mode, follow these steps on the PE router to configure a PE-to-PE routing
session in a provider network that uses IBGP:
Command
Step 1
configure terminal
Step 2
router bgp autonomous-system-number
Step 3 address-family vpnv4 [unicast]
Step 4 neighbor ip-address remote-as as-number
Step 5
neighbor ip-address activate
Step 6
end
Step 7 show ip bgp [ipv4] [neighbors] [vpnv4]
Step 8 copy running-config startup-config
Use the no router bgp autonomous-system global configuration command to delete the BGP routing
session.
78-15870-01
Purpose
Enter global configuration mode.
Enable IP routing (required only if routing is disabled).
Enable a BGP routing process, assign it the AS number passed
to the other BGP routers, and enter router configuration mode.
The AS number can be from 1 to 65535, with 64512 to 65535
designated as private autonomous numbers.
Specify a neighbor IP address or BGP peer group that
identifies it to the local autonomous system. The AS number
can be from 1 to 65535.
Activate the advertisement of the IPv4 address family.
Return to privileged EXEC mode.
Verify the configuration.
(Optional) Save your entries in the configuration file.
Purpose
Enter global configuration mode.
Enter router configuration mode.
Enter address family configuration mode to configure routing
sessions that use standard VPNv4 address prefixes.
(Optional) unicast—Specify VPNv4 unicast address prefixes.
Define an IBGP session between the PE routers.
Activate the advertisement of the IPv4 address family.
Return to privileged EXEC mode.
Verify BGP configuration. Display information about all BGP
IPv4 prefixes.
(Optional) Save your entries in the configuration file.
Catalyst 3750 Metro Switch Software Configuration Guide
Configuring MPLS VPNs
30-9