3Com Switch 8800 Advanced Software V5 Configuration Guide

BGP Configuration Examples 465
[SwitchD-ospf-1-area-0.0.0.0] quit
[SwitchD-ospf-1] quit
3 Configure BGP connections
# Configure Switch A
<SwitchA> system-view
[SwitchA] bgp 100
[SwitchA-bgp] peer 192.1.1.2 as-number 200
[SwitchA-bgp] peer 193.1.1.2 as-number 200
# Advertise network 1.0.0.0/8 to the BGP routing table of Switch A.
[SwitchA-bgp] network 1.0.0.0 8
[SwitchA-bgp] quit
# Configure Switch B.
[SwitchB] bgp 200
[SwitchB-bgp] peer 192.1.1.1 as-number 100
[SwitchB-bgp] peer 194.1.1.1 as-number 200
[SwitchB-bgp] quit
# Configure Switch C
[SwitchC] bgp 200
[SwitchC-bgp] peer 193.1.1.1 as-number 100
[SwitchC-bgp] peer 195.1.1.1 as-number 200
[SwitchC-bgp] quit
# Configure Switch D
[SwitchD] bgp 200
[SwitchD-bgp] peer 194.1.1.2 as-number 200
[SwitchD-bgp] peer 195.1.1.2 as-number 200
[SwitchD-bgp] quit
4 Configure attributes for route 1.0.0.0/8, making SwitchD give priority to the route
learned from SwitchC.
■ Configure a higher MED value for the route 1.0.0.0/8 advertised from Switch A
to peer 192.1.1.2.
# Define an ACL numbered 2000 to permit route 1.0.0.0/8.
[SwitchA] acl number 2000
[SwitchA-acl-basic-2000] rule permit source 1.0.0.0 0.255.255.255
[SwitchA-acl-basic-2000] quit
# Define two routing policies, apply_med_50, which sets the MED for route
1.0.0.0/8 to 50, and apply_med_100, which sets the MED for route 1.0.0.0/8 to
100.
[SwitchA] route-policy apply_med_50 permit node 10
[SwitchA-route-policy] if-match acl 2000
[SwitchA-route-policy] apply cost 50
[SwitchA-route-policy] quit
[SwitchA] route-policy apply_med_100 permit node 10