Users Guide

1416 BGP
OSPF on S3 is configured similarly to S2 with VRF Red and Blue:
1 Create OSPF sessions in each VRF. Assign area 0. Router ID assignment is
required.
S3(config)#router ospf vrf "Blue"
S3(config-router-vrf-Blue)#router-id 172.18.0.99
S3(config-router-vrf-Blue)#network 172.18.0.0 255.255.255.255
area 0
S3(config-router-vrf-Blue)#exit
S3(config)#router ospf vrf "Red"
S3(config-router-vrf-Red)#router-id 172.16.0.98
S3(config-router-vrf-Red)#network 172.16.0.0 255.255.255.255
area 0
S3(config-router-vrf-Red)#exit
2 Assign the VLANs to the physical interface connected to S1.
S3(config)#interface Gi1/0/16
S3(config-if-Gi1/0/16)#switchport mode trunk
S3(config-if-Gi1/0/16)#switchport trunk allowed vlan 1,16,18
S3(config-if-Gi1/0/16)#exit
Examine the OSPF adjacencies on router S1. Every router is connected to
every other router.
S1#show ip ospf neighbor vrf Red
Router ID Priority IP Address Interface State Dead
Time
---------------- -------- --------------- ----------- ---------------- ------
172.16.0.99 1 172.16.0.2 Vl16 Full/BACKUP-DR 37
172.16.0.98 1 172.16.0.3 Vl16 Full/BACKUP-DR 33
S1#show ip ospf neighbor vrf Green
Router ID Priority IP Address Interface State Dead
Time
---------------- -------- --------------- ----------- ---------------- ------
172.17.0.99 1 172.17.0.2 Vl17 Full/BACKUP-DR 33
S1#show ip ospf neighbor vrf Blue
Router ID Priority IP Address Interface State Dead
Time
---------------- -------- --------------- ----------- ---------------- ------
172.18.0.99 1 172.18.0.3 Vl18 Full/BACKUP-DR 35