3com S7906E Manuel De Montage

1-63

[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 Switch D give priority to the route learned from

Switch C.

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

[SwitchA-route-policy] if-match acl 2000

[SwitchA-route-policy] apply cost 100

[SwitchA-route-policy] quit

# Apply routing policy apply_med_50 to the route advertised to peer 193.1.1.2 (Switch C), and

apply_med_100 to the route advertised to peer 192.1.1.2 (Switch B).

[SwitchA] bgp 100

[SwitchA-bgp] peer 193.1.1.2 route-policy apply_med_50 export

[SwitchA-bgp] peer 192.1.1.2 route-policy apply_med_100 export

[SwitchA-bgp] quit

# Display the BGP routing table on Switch D.

[SwitchD] display bgp routing-table

Total Number of Routes: 2

BGP Local router ID is 194.1.1.1

Status codes: * - valid, > - best, d - damped,

h - history, i - internal, s - suppressed, S - Stale

Origin : i - IGP, e - EGP, ? - incomplete

Network NextHop MED LocPrf PrefVal Path/Ogn