Categories R&S

OSPF – Implement and troubleshoot filtering – Distribute-list

Following our path through the CCIEv5 topics, let’s move on to the OSPF Implement and troubleshoot filtering series.   We will start with distribute-list.   Theory: With an inbound distribute-list, we can affect the local routing table to prevent routes to be inside a routing table.   Requirements : Make sure R5 loopbacks 10,11,12 are […]

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Categories R&S

OSPF – Implement and troubleshoot route summarization – External summarization

Let’s now have a look at external summarization.   Theory: This is specific to external routes redistributed in OSPF. We need to implement this on the router that is doing the redistribution.   Requirements: Create three new loopbacks on R5 (Lo 10,11,12) and R6 (Lo 10,11,12). Make sure those new IP addresses are summarize in […]

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