[c-nsp] multihop VPDN Problem

[Oliver Boehmer (oboehmer)]

Edi Guntoro <> wrote on Tuesday, June 17, 2008 3:52 AM:

> DA,
> I'm trying to setup multihop vpdn using cisco router, here are the
> network diagram; 
> PC<--pppoe-->LAC<--L2TP-->LNS1<--L2TP-->LNS2
> But, I have a problem with the connection, LNS1 never triger L2tp
> connection to LNS2. And on LNS2, I suspect the debug message "ppp48
> PPP: LCP Jam failed on [MRU] option"

I assume an MTU mismatch issue which can be resolved via "ppp mtu
adaptive" on LNS2's vtemplate or by enabling LCP renegotiation on LNS2's
vpdn-group ("lcp reneg on-mismatch"). Or set the MTU to 1492 on all
involved vtemplates (assuming you're using this MTU on the client).

	oli