Cisco CCNP / BSCI Certification: Troubleshooting Route Redistribution, Part I
If there’s one CCNP / BSCI topic that looks so easy but can lead to a real headache, it’s route redistribution. I’m not even talking about the routing loops and suboptimal routing that can result when route redistribution is done without proper planning – I’m talking about the basic commands themselves. Leaving out one single command option, or forgetting what else needs to be redistributed when redistributing dynamically discovered routes, can leave you with a routing table that looks complete but does not result in full IP connectivity.
In this free CCNP / BSCI tutorial series, we’ll take a look at three common errors in route redistribution configurations, and how to fix them. We’ll use three routers, R1, R3, and R5. R1 and R5 are in a RIPv2 domain and R1 and R3 are in an OSPF domain. R1 will be performing two-way route redistribution.
R5 is advertising its loopback, 5.5.5.5/24, into the RIPv2 domain. R1 sees this route in its RIP routing table:
R1#show ip route rip
5.0.0.0/24 is subnetted, 1 subnets
R ...
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