Netgear GSM7252PS ProSafe Managed Switch Web Management User Manual - Page 212
Route Preferences, Routing, Routing Table, Advanced, Route, Preferences, Static, OSPF Intra
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ProSafe® Gigabit L3 Managed Stackable Switches Software Administration Manual Route Preferences Use this panel to configure the default preference for each protocol, e.g., 60 for static routes, 120 for RIP. These values are arbitrary values in the range of 1 to 255 and are independent of route metrics. Most routing protocols use a route metric to determine the shortest path known to the protocol, independent of any other protocol. 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 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. Use RIP to specify the RIP route preference value in the router. The default value is 120. The range is 1 to 255. 3. Use OSPF Intra to 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. Use OSPF Inter to 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. Use OSPF External to 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. 212 | Chapter 4. Routing