Route Redistribution - Avaya G250 Administration

Use the show ip ospf command to display general information about OSPF routing.
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Use the show ip ospf database command to display lists of information related to the
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OSPF database for a specific router.
Use the show ip ospf interface command to display the OSPF-related interface
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information.
Use the show ip ospf neighbor command to display OSPF neighbor information on a
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per-interface basis.
Use the timers spf command to configure the delay between runs of OSPF's (SPF)
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calculation. Use the no form of this command to restore the default value.

Route redistribution

Route redistribution is the interaction of multiple routing protocols. OSPF and RIP can be
operated concurrently in the G250/G350. In this case, you can configure the G250/G350 to
redistribute routes learned from one protocol into the domain of the other routing protocol.
Similarly, static routes can be redistributed to RIP and OSPF.
Note:
Take care when you configure route redistribution. It involves metric changes and
Note:
might cause routing loops in the presence of other routes with incompatible
schemes for route redistribution and route preferences.
The G250/G350 scheme for metric translation in route redistribution is as follows:
Static to RIP metric configurable (default 1)
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OSPF internal metric N to RIP metric (default 1)
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OSPF external type 1 metric N to RIP metric (default 1)
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OSPF external type 2 metric N to RIP metric (default 1)
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Static to OSPF external type 2, metric configurable (default 20)
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RIP metric N to OSPF external type 2, metric (default 20)
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Direct to OSPF external type 2, metric (default 20)
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By default, the G250/G350 does not redistribute routes between OSPF and RIP. Redistribution
from one protocol to the other can be configured. Static routes are, by default, redistributed to
RIP and OSPF. The G250/G350 allows the user to globally disable redistribution of static routes
to RIP, and separately to globally disable redistribution of static routes to OSPF. In addition you
can configure, on a per static route basis, whether the route is to be redistributed to RIP and
OSPF, and what metric to use (in the range of 1-15). The default state is to allow the route to be
redistributed at metric 1. When static routes are redistributed to OSPF, they are always
redistributed as external type 2.
Route redistribution
Issue 1.1 June 2005 351