3Com Switch 7700 Configuration Manual page 179

[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.
[Switch C] bgp 200
[Switch C-bgp] group rr internal
[Switch C-bgp] peer rr reflect-client
[Switch C-bgp] peer 193.1.1.2 group rr
[Switch C-bgp] peer 194.1.1.2 group rr
4 Configure Switch D:
a Configure VLAN 4:
[Switch D] interface vlan-interface 4
[Switch D-Vlan-interface4] ip address 194.1.1.2 255.255.255.0
b Configure BGP peers
[Switch D] bgp 200
group in internal
[Switch D-bgp] peer 194.1.1.1 group in
Using the display bgp routing-table command, you can view BGP routing table
on Switch B. Note that Switch B knows of the existence of network 1.0.0.0.
Using the display bgp routing-table command, you can view the BGP routing
table on Switch D. Note that Switch D also knows the existence of network
1.0.0.0.
Configuring BGP Routing
This example illustrates how the administrators manage the routing via BGP
attributes. All Ethernet switches are configured with BGP, and IGP in AS 200 uses
OSPF. Switch A is in AS 100, and acts as Switch B of AS 200 and BGP neighbor of
Switch C. Both Switch B and Switch C operate IBGP to Switch D. Switch D is also
in AS 200.
Figure 15 BGP Routing Configuration
VLAN 2
192.1.1.1/24
Switch A
1.1.1.1
To network
VLAN 3
1.0.0.0
193.1.1.1/24
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] interface Vlan-interface 3
[Switch A-Vlan-interface3] ip address 193.1.1.1 255.255.255.0
To network
2.2.2.2
2.0.0.0
VLAN 2
VLAN 4
192.1.1.2/24
194.1.1.2/24
Switch B
IBGP
EBGP
EBGP IBGP
Switch C
VLAN 5
VLAN 3
195.1.1.2/24
193.1.1.2/24
3.3.3.3
BGP
AS200
VLAN 4
194.1.1.1/24
Switch D
4.4.4.4
VLAN 5
195.1.1.1/24
To network
To network
4.0.0.0
3.0.0.0
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