Procedure
Step 1 Assign IP addresses to the interfaces of Switches. The configuration details are not mentioned
here.
Step 2 Configure basic BGP functions. Establish EBGP peer relationships between Switch A and
Switch B, and between Switch A and Switch C and an IBGP peer relationship between
Switch B and Switch C.
# Configure Switch A.
[SwitchA] bgp 100
[SwitchA-bgp] router-id 1.1.1.1
[SwitchA-bgp] peer 200.1.1.2 as-number 200
[SwitchA-bgp] peer 200.1.1.2 ebgp-max-hop
[SwitchA-bgp] peer 200.1.2.2 as-number 200
[SwitchA-bgp] peer 200.1.2.2 ebgp-max-hop
[SwitchA-bgp] quit
# Configure Switch B.
[SwitchB] bgp 200
[SwitchB-bgp] router-id 2.2.2.2
[SwitchB-bgp] peer 200.1.1.1 as-number 100
[SwitchB-bgp] peer 200.1.1.1 ebgp-max-hop
[SwitchB-bgp] peer 9.1.1.2 as-number 200
[SwitchB-bgp] network 172.16.1.0 255.255.255.0
[SwitchB-bgp] quit
# Configure Switch C.
[SwitchC] bgp 200
[SwitchC-bgp] router-id 3.3.3.3
[SwitchC-bgp] peer 200.1.2.1 as-number 100
[SwitchC-bgp] peer 200.1.2.1 ebgp-max-hop
[SwitchC-bgp] peer 9.1.1.1 as-number 200
[SwitchC-bgp] network 9.1.1.0 255.255.255.0
[SwitchC-bgp] quit
# Check the status of BGP peer relationships on Switch A. The command output shows that the
BGP peer relationships are in the Established state.
<SwitchA> display bgp peer
BGP local router ID : 1.1.1.1
Local AS number : 100
Total number of peers : 2 Peers in established state : 2
Peer V AS MsgRcvd MsgSent OutQ Up/Down State PrefRcv
200.1.1.2 4 200 2 5 0 00:01:25 Established 0
200.1.2.2 4 200 2 4 0 00:00:55 Established 0
Step 3 Set the MED.
Set the MED sent from Switch B to Switch C through the policy.
# Configure Switch B.
[SwitchB] route-policy 10 permit node 10
[SwitchB-route-policy] apply cost 100
[SwitchB-route-policy] quit
[SwitchB] bgp 200
[SwitchB-bgp] peer 200.1.1.1 route-policy 10 export
# Configure Switch C.
[SwitchC] route-policy 10 permit node 10
[SwitchC-route-policy] apply cost 150
S6700 Series Ethernet Switches
Configuration Guide - IP Routing 7 BGP Configuration
Issue 01 (2012-03-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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