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Cisco Catalyst Switch Module 3110 and 3012 for IBM BladeCenter Software Configuration Guide
OL-12189-01
Chapter 38 Configuring IP Unicast Routing
Configuring Multi-VRF CE
You can also enable the logging of messages generated when a BGP neighbor resets, comes up, or goes
down by using the bgp log-neighbor changes router configuration command.
Configuring Multi-VRF CE
This section applies only to the Catalyst Switch Module 3110.
Virtual Private Networks (VPNs) provide a secure way for customers to share bandwidth over an
ISP-backbone network. A VPN is a collection of sites sharing a common routing table. A customer site
is connected to the service-provider network by one or more interfaces, and the service provider
associates each interface with a VPN routing table known as a VPN routing/forwarding (VRF) table.
The Catalyst Switch Module 3110 supports multiple VPN routing/forwarding (multi-VRF) instances in
customer-edge (CE) devices (multi-VRF CE) when the switch is running the IP services or advanced IP
services feature set. A service provider uses multi-VRF CE allows to support two or more VPNs with
overlapping IP addresses.
Note The switch does not use Multiprotocol Label Switching (MPLS) to support VPNs. For information about
MPLS VRF, see the Cisco IOS Switching Services Configuration Guide, Release 12.2.
These sections contain this information:
• Understanding Multi-VRF CE, page 38-71
• Default Multi-VRF CE Configuration, page 38-73
• Multi-VRF CE Configuration Guidelines, page 38-73
• Configuring VRFs, page 38-74
• Configuring VRF-Aware Services, page 38-75
• Configuring Multicast VRFs, page 38-78
• Configuring a VPN Routing Session, page 38-79
• Configuring BGP PE to CE Routing Sessions, page 38-80
• Multi-VRF CE Configuration Example, page 38-80
• Displaying Multi-VRF CE Status, page 38-84
show ip bgp neighbors [address] Display detailed information on the BGP and TCP connections to
individual neighbors.
show ip bgp neighbors [address] [advertised-routes |
dampened-routes | flap-statistics | paths
regular-expression | received-routes | routes]
Display routes learned from a particular BGP neighbor.
show ip bgp paths Display all BGP paths in the database.
show ip bgp peer-group [tag] [summary] Display information about BGP peer groups.
show ip bgp summary Display the status of all BGP connections.
Table 38-12 IP BGP Clear and Show Commands (continued)
Command Purpose