You don't need to redistribute every route in your network. In this video, discover how you can use access-control lists and route maps to block route redistribution for specific subnets.
- [Instructor] There are times … when we're doing route redistribution, … where we don't necessarily want … to redistribute every single route … from one autonomous system to another. … Maybe within EIGRP, … we've got one route that we want to approve, … or let it through into OSPF, … but there's another route that we want to reject. … We don't want it to be redistributed. … So let's see exactly how we can filter a route … using the topology that we've been building on … in this module. … Let's say, for example, for some reason, … we don't want the 192.168.2.0/24 network, … which lives between R3, and SW4, … let's say for some reason we don't want that network … to be redistributed into OSPF. … One way that we can block that route … from being redistributed, is to use a route map. … So let's go back out to our live topology, … and we'll go to R2, we'll create an access-control list … that's going to match that network, … and then we'll apply that ACL to a route map, … and then we'll apply the route map …
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