Cisco Catalyst 3750-X User Manual

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Catalyst 3750-X and 3560-X Switch Software Configuration Guide
OL-21521-01
Chapter 42 Configuring IP Unicast Routing
Configuring Multi-VRF CE
Beginning in privileged EXEC mode, follow these steps to configure OSPF in the VPN:
Use the no r
outer ospf process-id vrf vrf-name global configuration command to disassociate the VPN
forwarding table from the OSPF routing process.
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 r
outer bgp autonomous-system-number global configuration command to delete the BGP
routing process. Use the command with keywords to delete routing characteristics.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
router ospf process-id vrf vrf-name Enable OSPF routing, specify a VPN forwarding table, and enter router
configuration mode.
Step 3
log-adjacency-changes (Optional) Log changes in the adjacency state. This is the default state.
Step 4
redistribute bgp
autonomous-system-number subnets
Set the switch to redistribute information from the BGP network to the
OSPF network.
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.
Step 6
end Return to privileged EXEC mode.
Step 7
show ip ospf process-id Verify the configuration of the OSPF network.
Step 8
copy running-config startup-config (Optional) Save your entries in the configuration file.
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.
Step 3
network network-number mask
network-mask
Specify a network and mask to announce using BGP.
Step 4
redistribute ospf process-id match
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.
Step 6
address-family ipv4 vrf vrf-name Define BGP parameters for PE to CE routing sessions, and 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.

Cisco Catalyst 3750-X Specifications

General

Brand	Cisco
Model	Catalyst 3750-X
Category	Switch
Language	English