Configuring Bgp Routing Sessions; Configuring Provider-Edge-To-Provider-Edge Routing Sessions; Ibgp Provider-Edge-To-Provider-Edge Configuration - Cisco 3845 - Security Bundle Router Software Manual

Configuring MPLS VPNs

Configuring BGP Routing Sessions

Beginning in privileged EXEC mode, follow these steps on the provider-edge 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
no bgp default ipv4-unicast
Step 5
neighbor {ip-address | peer-group-name}
remote-as as-number
Step 6 neighbor {ip-address | peer-group-name}
update-source interface-id
Step 7
end
Step 8
show ip bgp neighbor
Step 9
copy running-config startup-config
Use the no router bgp autonomous-system global configuration command to delete the BGP routing
session.

Configuring Provider-Edge-to-Provider-Edge Routing Sessions

You can configure provider-edge-to-provider-edge (PE-PE) routing sessions using IBGP or BGP.

IBGP Provider-Edge-to-Provider-Edge Configuration

Beginning in privileged EXEC mode, follow these steps on the provider-edge 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 activate
Step 5
neighbor ip address send-community extended
Step 6
end
Cisco ME 3800X and 3600X Switch Software Configuration Guide
34-10
Chapter 34 Configuring MPLS, MPLS VPN, MPLS OAM, and EoMPLS
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.
Specify the source for BGP updates.
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.
Activate the advertisement of the IPv4 address family.
Return to privileged EXEC mode.
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