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New Member

LCP configuration options on 12000 series PoS cards

I am evaluating solutions for monitoring traffic on a PoS link.

We are proposing to do this as follows:

Placing a TAP on the PoS link between two PoS switches. This TAP takes a copy of all traffic on the link and forwards it to a PoS router. The TAP splitter only allows traffic to be directed from the link to the PoS router, all traffic FROM the PoS router towards the PoS lnk is blocked by the TAP splitter.

The issue that we forsee is that during the link establishment phase of PPP - LCP packets are sent between either ends of the PoS link. The PoS router, because it also receives a copy of all this traffic will also see the LCP configuration 'request' and 'acknowledgement' packets.

Any ideas on 1) what will happen the router interface when it sees requests from either end of the link and subsequent acknowledgements and 2)Is it possible to configure the interface to ignore LCP packets and for the interface to still be in a position to receive traffic from the link?

Thanks in advance, Liz

2 REPLIES
New Member

Re: LCP configuration options on 12000 series PoS cards

Your solution won't work. The PoS interface of the router also needs a L2 (HDLC, PPP or Frame Relay) link negotiation to stay up. It can not be configured just in "monitoring" mode.

A special test tool can accomplish this task, e.g.:

http://www.acterna.com/products/cyclonecore/

New Member

Re: LCP configuration options on 12000 series PoS cards

That's what I thought.

Thanks, Liz

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