386 CHAPTER 33: BGP CONFIGURATION
Network diagram
Figure 93 Network diagram for BGP route reflector configuration
Configuration procedure
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:
# Configure VLAN 2:
[Switch B] interface Vlan-interface 2
[Switch B-Vlan-interface2] ip address 192.1.1.2 255.255.255.0
# Configure VLAN 3:
[Switch B] interface Vlan-interface 3
[Switch B-Vlan-interface3] ip address 193.1.1.2 255.255.255.0
# Configure BGP 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:
# Configure VLAN 3:
[Switch C] interface Vlan-interface 3
[Switch C-Vlan-interface3] ip address 193.1.1.1 255.255.255.0
# Configure VLAN 4:
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
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