Most networks you encounter will probably only run a single routing protocol like OSPF or EIGRP. Maybe you find some old small networks that are still running RIP that need migration to OSPF or EIGRP. What if you have a company that is running OSPF and you just bought another company and their network is running EIGRP?
Let’s take a look at the topology that we will use:
This is the topology that we will use:
When you configure multipoint redistribution it’s a good idea to use route tagging to prevent advertising something from routing protocol “A” into “B” and back into “A”. Let me give you an example:
The redistribution configuration is quite easy but if you are not careful you will end up with sub-optimal routing and/or routing loops.
When it comes to redistribution, there are a lot of things that potentially could go wrong. Two possible issues are sub-optimal routing and routing loops. All redistribution problems boil down to two different issues: