Compatible Systems 5.4 manual IP Route Redistribution

Chapter 2 - IP Routing & Bridging 53

routes to a destination but there is a static route, that route will be installed even if the precedence is Ospf Rip Static. Also, if there is a configured static route to a destination for which there was a RIP or OSPF route with greater precedence, that static route will be automatically re-installed if the RIP/OSPF route goes away.

ϖNote: The BGP protocol will always be checked for first. Protocol Prece- dence is used to set the precedence order for RIP, Static, and OSPF proto- cols.

ϖNote: An exception to the precedence rule is an OSPF external (i.e., type ASE) route. OSPF external routes will be overwritten by a RIP or static route, regardless of the precedence. This is because OSPF external routes origi- nally come from another protocol, usually RIP or static. If the router is running both RIP and OSPF, but another router on the network is redistrib- uting RIP into OSPF, the RIP routes would be overwritten by OSPF external routes without this exception. In order to get the RIP routes via OSPF external routes, simply uncheck the Input RIP checkbox in the TCP/IP Routing Dialog Box, and it will then install the routes as OSPF externals.

IP Route Redistribution

This section sets global configuration parameters which allow the redistribu- tion of routes from one dynamic IP routing protocol into another. This allows RIP, OSPF, and BGP protocols to co-exist and exchange routing information. Route redistribution is global to the device.

ϖNote: Redistribution of static routes can be done using the IP Multipro- tocol Precedence Dialog Box.