RE: OSPF route preferencing

From: azhar mumtaz (azharmumtaz2000@yahoo.com)
Date: Fri Apr 14 2006 - 20:14:55 GMT-3


Hi :

Please see CSCdk41691.

There is a knob in the ios, if you would like to
prefer inter area routes over intra .

This is a hidden configuration option to set the
highest allowed metric that will be installed for an
ospf intra-area route. By default, the highest allowed
intra-area metric is 16777214.

For example, if max-metric is set to 50000, then any
ospf intra-area routes with a metric greater than
50000 will not be installed in the IP routing table.

router ospf <tag>
 max-metric intra-area <n>

Where n can range from 1 to 16777214

Adding or deleting this configuration will
automatically cause ospf to re-run the spf
calculation.

To remove the configuration:

router ospf <tag>
 no max-metric

The drawback of this approach is if you prefer
inter-area routes, your intra-area routes will not be
used, even when available and you will loose
redundancy.

HTH

Thanks
Azhar



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