Information Technology Reference
In-Depth Information
Example 8-84 BGP Configurations on R7 (Continued)
bgp confederation identifier 100
bgp confederation peers 65000
network 192.168.202.0
neighbor Internal peer-group
neighbor Internal remote-as 65001
neighbor Internal update-source Loopback0
neighbor 192.168.100.4 peer-group Internal
neighbor 192.168.100.5 peer-group Internal
neighbor 192.168.100.6 peer-group Internal
no auto-summary
Configurations on R8 are not changed during migration. (See Example 8-85.)
Example 8-85 BGP Configurations on R8
router bgp 200
no synchronization
bgp log-neighbor-changes
network 172.16.0.0
neighbor 192.168.18.1 remote-as 100
no auto-summary
Migration Procedures
When the first router is migrated, a new member AS, AS 100, is created. This router also
has confederation ID 100. This in effect changes the two-member-AS confederation into a
three-member-AS confederation. The remaining procedures are to migrate routers from the
other two member autonomous systems to the new member AS 100. When all the routers
are moved to member AS 100, the migration is complete.
Here is a high-level summary of the steps:
Step 1
Select R4 as the starting router, and move it out of the forwarding paths.
Step 2
Migrate R4 to a new member AS 100, and make it a route reflector.
Step 3
On R1 and R2, add member AS 100 to the peers, and update the peerings
with R4.
Step 4
Move R6 from member AS 65001 to member AS 100. Put R4 back in the
forwarding paths.
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