Information Technology Reference
In-Depth Information
Relevant Configurations on R1 (Continued)
Example 8-1
neighbor 192.168.100.5 peer-group Internal
neighbor 192.168.100.6 peer-group Internal
neighbor 192.168.100.7 peer-group Internal
no auto-summary
R2 is the other core router in the left POP. The same peer group Internal is used for all iBGP
peers (See Example 8-2.)
Relevant Configurations on R2
Example 8-2
router isis
net 49.0001.1921.6810.0002.00
is-type level-2-only
!
router bgp 100
no synchronization
bgp router-id 192.168.100.2
bgp log-neighbor-changes
neighbor Internal peer-group
neighbor Internal remote-as 100
neighbor Internal update-source Loopback0
neighbor 192.168.100.1 peer-group Internal
neighbor 192.168.100.3 peer-group Internal
neighbor 192.168.100.4 peer-group Internal
neighbor 192.168.100.5 peer-group Internal
neighbor 192.168.100.6 peer-group Internal
neighbor 192.168.100.7 peer-group Internal
no auto-summary
R3 is an access router that injects customer routes into BGP. The prefix 192.168.200.0/24
is originated and advertised to other BGP peers. (See Example 8-3.)
Relevant Configurations on R3
Example 8-3
router isis
net 49.0001.1921.6810.0003.00
is-type level-2-only
!
router bgp 100
no synchronization
bgp router-id 192.168.100.3
bgp log-neighbor-changes
network 192.168.200.0
neighbor Internal peer-group
neighbor Internal remote-as 100
neighbor Internal update-source Loopback0
neighbor 192.168.100.1 peer-group Internal
continues
