Cisco 3750G - Catalyst Integrated Wireless LAN Controller, Руководство по настройке

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35-64
Catalyst 3750 Switch Software Configuration Guide
OL-8550-02
Chapter 35 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
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, called a VPN routing/forwarding (VRF) table.
The Catalyst 3750 switch 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
image. If you try to configure it on a switch runing the IP base image, you see an error message.
Multi-VRF CE allows a service provider to support two or more VPNs with overlapping IP addresses.
On a switch running the IP base image, configuring multi-VRF-CE and EIGRP stub routing at the same
time is not allowed.
Note The switch does not use Multiprotocol Label Switching (MPLS) to support VPNs. For information about
MPLS VRF, refer to the
Cisco IOS Switching Services Configuration Guide, Release 12.2 .
These sections contain this information:
•
Understanding Multi-VRF CE, page 35-65
• Default Multi-VRF CE Configuration, page 35-67
•
Multi-VRF CE Configuration Guidelines, page 35-67
• Configuring VRFs, page 35-68
•
Configuring a VPN Routing Session, page 35-69
• Configuring BGP PE to CE Routing Sessions, page 35-69
•
Multi-VRF CE Configuration Example, page 35-70
• Displaying Multi-VRF CE Status, page 35-74
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 35-11 IP BGP Clear and Show Commands (continued)
Command Purpose