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ciscoaec1
Beginner

BGP Lab demonstrating a continuous loop

How do i configure a lab to simulate a BGP routing protocol loop?
I want to see the effects on the routing table and then to experiment with different fixes.

Are there any examples around?

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Tharak Abraham
Participant

Alan,

Below post by Petr should cover what you are looking for

http://blog.ine.com/2010/01/30/anomalies-in-bgp-part-i/#more-3488

The above is a typical eg: of what happens if the iBGP peering is done without considering the data plane/forwarding parth.

Though it doesn't quite happen in the real, you can also us "allow-as-in" or the "as-override" feature and you should be able to simulate this (Kinda cheap trick )

Tharak

Tharak,

Many thanks, this will take a while to absorb.

I am also looking for an example where a route seems to be poisoned, deleted and then returns on a cyclic 30 second timer.

Alan.

Sorry for being very broad but use a lot of summarizations, simulate flaps in short intervals (maybe with EEM scripts)

The idea is to think how the protocol does and fool it