User Manual

Routing
216
M6100 Web Management User Guide
The best route to a destination is chosen by selecting the route with the lowest preference
value. When there are multiple routes to a destination, the preference values are used to
determine the preferred route. If there is still a tie, the route with the best route metric will be
chosen. To avoid problems with mismatched metrics (i.e., RIP and Open Shortest Path First
(OSPF) metrics are not directly comparable) you must configure different preference values
for each of the protocols.
To display the Route Preferences page, click Routing
 Routing Table Advanced  Route
Preferences.
1. Use Static to specify the static route preference value in the router. The default value is
1. The range is 1 to 255.
2. Specify the RIP
route preference value in the router. The default value is 120. The range
is 1 to 255.
3. Specify the OSPF Intra route preference value in the router
. The default value is 110. The
range is 1 to 255. The OSPF specification (RFC 2328) requires that preferences must be
given to the routes learned via OSPF in the following order: intra < inter < type-1 < type-2.
4. Specify the OSPF Inter route preference value in the router
. The default value is 110. The
range is 1 to 255. The OSPF specification (RFC 2328) requires that preferences must be
given to the routes learned via OSPF in the following order: intra < inter < type-1 < type-2.
5. Specify the OSPF External route preference value in the router
. The default value is 110.
The range is 1 to 255. The OSPF specification (RFC 2328) requires that preference value
must be the same for all the OSPF external route types like type1/type2/nssa1/nssa2.
Field Description
Local This field displays the local route preference value.
6. Click Apply to send the updated configuration to the switch. Configuration changes take
effect immediately.
7. Click Cancel to cancel the configuration on the screen and reset the data on the screen to
the latest value of the switch.