3Com Switch 7700 Configuration Manual page 178

170 C 5: IP R
HAPTER OUTING
P O
ROTOCOL PERATION
Configuring BGP Route Reflector
Switch B receives an update packet passing EBGP and transmits it to Switch C.
Switch C is a reflector with two clients: Switch B and Switch D. When Switch C
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
Network
1.0.0.0
VLAN 100
1.1.1.1/8
VLAN 2
192.1.1.1/24
Switch A
AS100
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:
VLAN 3
193.1.1.1/24
AS200
IBGP
EBGP
VLAN 3
193.1.1.2/24
VLAN 2
192.1.1.2/24
Switch B
Client
Route reflector
VLAN 4
194.1.1.1/24
Switch C
IBGP
VLAN 4
194.1.1.2/24
Switch D
Client