Categories R&S

OSPF – Implement and troubleshoot filtering – Database filtering

That’s the last part of the implement and troubleshoot filtering series.     Theory: Database filtering can be used to filter outgoing LSA on an OSPF interface. Hello packets are still exchange, so neighbor relationship is maintain but LSA advertisement are stops.   Requirements: Make sure that R4 doesn’t receive any advertisement from R1.   […]

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Categories R&S

OSPF – Implement and troubleshoot filtering – Forwarding address suppression

Let’s now have a look at this other feature.   Theory: Forwarding address suppression causes routers that are configured not to advertise forwarding addresses into the backbone to direct forwarded traffic to the translating NSSA ASBRs.   Requirements: – Configure area 2 as NSSA. – Filter R5 loopback (5.5.5.5) from being advertise into area 0 […]

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