Cisco Systems 3750E 用户手册
38-70
Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02
Chapter 38 Configuring IP Unicast Routing
Configuring Multi-VRF CE
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.
routing process. Use the command with keywords to delete routing characteristics.
Multi-VRF CE Configuration Example
is a simplified example of the physical connections in a network similar to that in
. 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 Catalyst 3750-E
or 3560-E 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.
or 3560-E 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.
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.
passed to other BGP routers, and enter router
configuration mode.
Step 3
network network-number mask
network-mask
network-mask
Specify a network and mask to announce using BGP.
Step 4
redistribute ospf process-id match
internal
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.
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.
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.