3Com S7906E Configuration Manual page 606

Configure an IP address for each interface, and make sure all neighboring routers are reachable to
each other.
Configure RIP basic functions
Configuring an Additional Routing Metric
An additional routing metric (hop count) can be added to the metric of an inbound or outbound RIP
route.
The outbound additional metric is added to the metric of a sent route, and the route's metric in the
routing table is not changed.
The inbound additional metric is added to the metric of a received route before the route is added into
the routing table, and the route's metric is changed. If the sum of the additional metric and the original
metric is greater than 16, the metric of the route will be 16.
Follow these steps to configure additional routing metrics:
To do...
Enter system view
Enter interface view
Define an inbound additional
routing metric
Define an outbound additional
routing metric
Configuring RIPv2 Route Summarization
Route summarization means that subnets in a natural network are summarized into a natural network
that is sent to other networks. This feature can reduce the size of routing tables.
After route summarization, the smallest metric among all the summarized routes is used as the metric of
the summary route.
Enabling RIPv2 route automatic summarization
You can disable RIPv2 route automatic summarization if you want to advertise all subnet routes.
Follow these steps to enable RIPv2 route automatic summarization:
To do...
Enter system view
Enter RIP view
Enable RIPv2 automatic route
summarization
Use the command...
system-view
interface interface-type
interface-number
rip metricin [ route-policy
route-policy-name ] value
rip metricout [ route-policy
route-policy-name ] value
Use the command...
system-view
rip [ process-id ]
[ vpn-instance
vpn-instance-name ]
summary
1-8
Remarks
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Optional
0 by default
Optional
1 by default
Remarks
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Optional
Enabled by default
If the subnet routes in the
routing table are not
consecutive, disable automatic
route summarization to avoid
black hole routing.