Configuring Bgp Route Reflector; Configure Router A - 3Com 3032 Configuration Manual

472 C 30: C
HAPTER ONFIGURING
Configuring BGP Route
Reflector
BGP
Figure 154 Networking diagram of configuring AS confederation
Router A
172.68.10.1
156.10.1.1
156.10.1.2
Router E
AS200

1 Configure Router A:

[RouterA] bgp 1001
[RouterA-bgp] undo synchronization
[RouterA-bgp] confederation id 100
[RouterA-bgp] confederation peer-as 1002 1003
[RouterA-bgp] peer 172.68.10.2 as-number 1002
[RouterA-bgp] peer 172.68.10.3 as-number 1003
2 Configure Router B:
[RouterB] bgp 1002
[RouterA-bgp] undo synchronization
[RouterB-bgp] confederation id 100
[RouterB-bgp] confederation peer-as 1001 1003
[RouterB-bgp] peer 172.68.10.1 as-number 1001
[RouterB-bgp] peer 172.68.10.3 as-number 1003
3 Configure Router C:
[RouterC] bgp 1003
[RouterA-bgp] undo synchronization
[RouterC-bgp] confederation id 100
[RouterC-bgp] confederation peer-as 1001 1002
[RouterC-bgp] peer 172.68.10.1 as-number 1001
[RouterC-bgp] peer 172.68.10.2 as-number 1002
[RouterC-bgp] peer 156.10.1.2 as-number 200
[RouterC-bgp] peer 172.68.1.2 as-number 1003
Router B receives a BGP update message and forwards the update to Router C,
which is configured as a route reflector and has two clients: Router B and Router
D. When Router C receives routing update from Router B, it reflects the
information to Router D. Therefore, an IBGP connection is not necessary between
Router B and Router D, because Router C will reflect the information to Router D.
Router B
AS1001
Ethernet
172.68.10.3
172.68.1.1
Router C
AS1003
AS100
AS1002
172.68.10.2
172.68.1.2
Router D