3Com Switch 4800G 24-Port Configuration Manual page 405

BGP Route Reflector
Configuration
1 Configure IP addresses for interfaces (omitted)
2 Configure BGP connections
# Apply the routing policy.
[SwitchA] bgp 10
[SwitchA-bgp] peer 200.1.2.2 route-policy comm_policy export
[SwitchA-bgp] peer 200.1.2.2 advertise-community
# Display the routing table on Switch B.
[SwitchB] display bgp routing-table 9.1.1.0
BGP local router ID : 2.2.2.2
Local AS number : 20
Paths: 1 available, 1 best
BGP routing table entry information of 9.1.1.0/24:
From : 200.1.2.1 (1.1.1.1)
Original nexthop: 200.1.2.1
Community : No-Export
AS-path : 10
Origin : igp
Attribute value : MED 0, pref-val 0, pre 255
State : valid, external, best,
Not advertised to any peers yet
The route 9.1.1.0/24 is not available in the routing table of Switch C.
Network requirements
In the following figure, all switches run BGP.
Between Switch A and Switch B is an EBGP connection, between Switch C and
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Switch B, and between Switch C and Switch D are IBGP connections.
Switch C is a route reflector with clients Switch B and D.
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Switch D can learn route 1.0.0.0/8 from Switch C.
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Network diagram
Figure 134 Network diagram for BGP route reflector configuration
Vlan-int100
1 .1.1.1/8
Vlan-int200
192.1.1.1 /24
Switch A
Vlan- int200
192 .1.1.2/24
AS 100
Configuration procedure
Route
Reflector
Vlan -int300
193 .1 .1.1/24
Switch C
Vlan -int300
193 .1.1.2/24
194.1.1.2/24
AS 200
Switch B
BGP Configuration Examples
Vlan -int400
194 .1.1 .1/24
Vlan-int400
Switch D
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