238
# Configure a routing policy.
[SwitchA] route-policy comm_policy permit node 0
[SwitchA-route-policy] apply community no-export
[SwitchA-route-policy] quit
# 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.
BGP route reflector configuration example
Network requirements
In Figure 93, all switches run BGP.
• Between Switch A and Switch B is an EBGP connection; between Switch C and Switch B, and
between Switch C and Switch D are IBGP connections.
• Switch C is a route reflector with clients Switch B and D.
• Switch D can learn route 1.0.0.0/8 from Switch C.
Figure 93 Network diagram
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