Huawei Quidway S3500 Series Operation Manual page 249

Operation Manual - Routing Protocol
Quidway S3500 Series Ethernet Switches
[Switch C] interface vlan-interface 5
[Switch C-Vlan-interface5] ip address 195.1.1.2 255.255.255.0
[Switch C] ospf
[Switch C-ospf] area 0
[Switch C-ospf-area-0.0.0.0] network 193.1.1.0 0.0.0.255
[Switch C-ospf-area-0.0.0.0] network 195.1.1.0 0.0.0.255
[Switch C] bgp 200
[Switch C-bgp] undo synchronization
[Switch C-bgp] peer 193.1.1.1 as-number 100
[Switch C-bgp] peer 195.1.1.1 as-number 200
4) Configure Switch D:
[Switch D] interface vlan-interface 4
[Switch D-Vlan-interface4] ip address 194.1.1.1 255.255.255.0
[Switch D] interface vlan-interface 5
[Switch D-Vlan-interface5] ip address 195.1.1.1 255.255.255.0
[Switch D] ospf
[Switch D-ospf] area 0
[Switch D-ospf-area-0.0.0.0] network 194.1.1.0 0.0.0.255
[Switch D-ospf-area-0.0.0.0] network 195.1.1.0 0.0.0.255
[Switch D-ospf-area-0.0.0.0] network 4.0.0.0 0.255.255.255
[Switch D] bgp 200
[Switch D-bgp] undo synchronization
[Switch D-bgp] peer 195.1.1.2 as-number 200
[Switch D-bgp] peer 194.1.1.2 as-number 200
To enable the configuration, all BGP neighbors will be reset using reset bgp all
command.
After above configuration, due to the fact that the MED attribute of route 1.0.0.0
discovered by Switch C is less than that of Switch B, Switch D will first select the route
1.0.0.0 from Switch C.
If the MED attribute of Switch A is not configured, the local preference on Switch C is
configured as follows:
# Configure the local preference attribute of Switch C
Add ACL 2000 on Switch C and permit network 1.0.0.0
[Switch C] acl number 2000
[Switch C-acl-basic-2000] rule permit source 1.0.0.0 0.255.255.255
Huawei Technologies Proprietary
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Chapter 5 BGP Configuration