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BGP 147
receives a route update from Switch B, it will transmit such information to Switch
D. You must establish an IBGP connection between Switch B and Switch D,
because Switch C reflects information to Switch D.
Figure 14 BGP Route Reflector Configuration
1 Configure Switch A:
[Switch A]interface vlan-interface 2
[Switch A-Vlan-interface2]ip address 192.1.1.1 255.255.255.0
[Switch A-Vlan-interface2]interface Vlan-interface 100
[Switch A-Vlan-interface100]ip address 1.1.1.1 255.0.0.0
[Switch A-Vlan-interface100]quit
[Switch A]bgp 100
[Switch A-bgp]network 1.0.0.0 255.0.0.0
[Switch A-bgp]group ex external
[Switch A-bgp]peer 192.1.1.2 group ex as-number 200
2 Configure Switch B:
a Configure VLAN 2:
[Switch B]interface Vlan-interface 2
[Switch B-Vlan-interface2]ip address 192.1.1.2 255.255.255.0
b Configure VLAN 3:
[Switch B]interface Vlan-interface 3
[Switch B-Vlan-interface3]ip address 193.1.1.2 255.255.255.0
c Configure peers.
[Switch B]bgp 200
[Switch B-bgp]group ex external
[Switch B-bgp]peer 192.1.1.1 group ex as-number 100
[Switch B-bgp]group in internal
[Switch B-bgp]peer 193.1.1.1 group in
3 Configure Switch C:
a Configure VLAN 3:
[Switch C]interface Vlan-interface 3
[Switch C-Vlan-interface3]ip address 193.1.1.1 255.255.255.0
b Configure VLAN 4:
[Switch C]interface vlan-Interface 4
[Switch C-Vlan-interface4]ip address 194.1.1.1 255.255.255.0
c Configure BGP peers and route reflector.
IBGP IBGP
EBGP
Client
Client
Route reflector
VLAN 4
194.1.1.1/24
VLAN 3
193.1.1.1/24
VLAN 3
193.1.1.2/24
VLAN 4
194.1.1.2/24
VLAN 2
192.1.1.2/24
VLAN 2
192.1.1.1/24
AS100
AS200
Network
1.0.0.0
VLAN 100
1.1.1.1/8
Switch A
Switch B
Switch C
Switch D