Configuring Rip To Advertise A Summary Route - 3Com S7906E Configuration Manual

[SwitchE-rip-1] undo summary
# Display the IP routing table of Switch A.
[SwitchA] display rip 1 database
1.0.0.0/8, cost 0, ClassfulSumm
1.1.1.0/24, cost 0, nexthop 1.1.1.1, Rip-interface
1.1.2.0/24, cost 0, nexthop 1.1.2.1, Rip-interface
1.1.3.0/24, cost 1, nexthop 1.1.1.2
1.1.4.0/24, cost 1, nexthop 1.1.2.2
1.1.5.0/24, cost 2, nexthop 1.1.1.2
1.1.5.0/24, cost 2, nexthop 1.1.2.2
The display shows that there are two RIP routes to network 1.1.5.0/24. Their next hops are Switch B
(1.1.1.2) and Switch C (1.1.2.2) respectively, with the same cost of 2. Switch C is the next hop router to
reach network 1.1.4.0/24, with a cost of 1.
3) Configure an additional metric for the RIP interface.
# Configure an additional metric of 3 for VLAN-interface 200 on Switch A.
[SwitchA] interface vlan-interface 200
[SwitchA-Vlan-interface200] rip metricin 3
[SwitchA-Vlan-interface200] display rip 1 database
1.0.0.0/8, cost 0, ClassfulSumm
1.1.1.0/24, cost 0, nexthop 1.1.1.1, Rip-interface
1.1.2.0/24, cost 0, nexthop 1.1.2.1, Rip-interface
1.1.3.0/24, cost 1, nexthop 1.1.1.2
1.1.4.0/24, cost 2, nexthop 1.1.1.2
1.1.5.0/24, cost 2, nexthop 1.1.1.2
The display shows that there is only one RIP route to network 1.1.5.0/24, with the next hop as Switch B
(1.1.1.2) and a cost of 2.

Configuring RIP to Advertise a Summary Route

Network requirements
As shown in the following figure:
Switch A and Switch B run OSPF, Switch D runs RIP, and Switch C runs OSPF and RIP.
Configure RIP to redistribute OSPF routes on Switch C so that Switch D has routes destined for
networks 10.1.1.0/24, 10.2.1.0/24, 10.5.1.0/24, and 10.6.1.0/24.
Route summarization is configured on Switch C and only the summary route 10.0.0.0/8 is
advertised, thus reducing the routing table size of Switch D.
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