Information Technology Reference
In-Depth Information
Example 8-35
BGP Configurations on R5 (Continued)
bgp confederation identifier 100
bgp confederation peers 100 65000
neighbor Internal peer-group
neighbor Internal remote-as 65001
neighbor Internal update-source Loopback0
neighbor 192.168.15.1 remote-as 100
neighbor 192.168.25.2 remote-as 100
neighbor 192.168.100.4 peer-group Internal
neighbor 192.168.100.6 peer-group Internal
neighbor 192.168.100.7 peer-group Internal
no auto-summary
After the routing information is learned, you can put R5 back in the forwarding paths by
removing the IGP metric changes made in Step 6.
Step 8: Update the Peering with R5 on R1 and R2
On R1 and R2, update the peerings with R5. Remove the peering sessions with R6 and R7.
Example 8-36 shows the new BGP configurations on R1.
Example 8-36
BGP Configurations on R1
router bgp 100
no synchronization
bgp router-id 192.168.100.1
bgp log-neighbor-changes
bgp confederation identifier 100
bgp confederation peers 65001
neighbor Internal peer-group
neighbor Internal remote-as 100
neighbor Internal update-source Loopback0
neighbor 192.168.14.4 remote-as 65001
neighbor 192.168.15.5 remote-as 65001
neighbor 192.168.18.8 remote-as 200
neighbor 192.168.100.2 peer-group Internal
neighbor 192.168.100.3 peer-group Internal
no auto-summary
This step completes the migration of the POP on the right. An updated topology is shown
in Figure 8-7.
