[j-nsp] Strange MPLS behaviour

Jonas Frey jf at probe-networks.de
Sun Dec 19 03:26:02 EST 2004


Hi,

i got the following setup of:

Servers <-> SITE B <-> SITE C <-> Servers

between SITE B and SITE C there is a MPLS link via a sonet/sdh
interface.

Config for SITE B:

rsvp {
    interface so-3/0/0.0;
}
mpls {
    label-switched-path to-sitec {
        from 10.0.0.2;
        to 10.0.0.1;
        no-cspf;
    }
    interface so-3/0/0.0;
}
ldp {
    interface lo0.0;
}



Config for SITE C:

rsvp {
    interface so-3/0/0.0;
}
mpls {
    label-switched-path to-siteb {
        from 10.0.0.1;
        to 10.0.0.2;
        no-cspf;
    }
    interface so-3/0/0.0;
}
ldp {
    interface lo0.0;
}


The LSP's are up on both site's (as seen via show mpls lsp).

However if i try to connect to a host directly connected to SITE-B from
the SITE-C router itself, it doesnt work. 
If it try to connect from a host behind SITE-B to a host behind SITE-C
(and the other way round) this works.

So if i try to do e.g. a traceroute from the SITE-C router to something
behind SITE-B i just get "* * *" etc, no replys, nothing. Seems packets
are disappearing there. Same thing on the other way around.

Any ideas?

Regards,
Jonas



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