Re: [mpls-linux-general] LDP with Cisco router

[James R. L. <jl...@mi...>]

On Thu, Mar 13, 2003 at 10:50:42AM -0600, Ben Groff wrote:
>=20
> The first question that comes to mind is, do you have routability betwe=
en
> the address the Cisco generates the LDP updates from and the linux box?
> I.E. can you do an extended ping from the Cisco to the linux box's
> ethernet address and source the ping from the router-id address?  If yo=
u
> can't successfully ping, check your IGP routing tables.

I'm gonna expand on what Ben said.  I think he is on the right track.

The Cisco is sending a transport address TLV.  The linux box needs to
be able to reach the address mentioned in the transport address TLV.

> -Ben
>=20
> > I=92m trying to set up a pc running zebra/ldp to establish a LDP sess=
ion with
> > a Cisco router. I haven=92t had any luck in completing this. So far, =
they are
> > exchanging Hello messages and the Cisco router is trying to establish=
 a TCP
> > connection (LDP session, port 646) with the pc. But this is where not=
hing
> > more happens; mplsd is not responding to the TCP SYN packets.
> >
> > I=92ve noticed a few things but have little knowledge of what it mean=
s: The
> > Hello messages from mplsd have the CSN TLV and not the Transport Addr=
ess TLV
> > while the Hello messages from the Cisco router do not have the CSN TL=
V and
> > has the Transport Address TLV.
> >
> > When executing "show ldp neighbour" on mplsd the following is returne=
d:
> >
> > Peer LDP Ident: 192.168.200.6:0; Local LDP Ident: 10.2.1.98:0
> >         TCP connection: n/a
> >         State: discovery; Msgs sent/recv: -/-;
> >         Up time: -
> >         LDP discovery sources:
> >           eth1
> >
> >
> > Can any one tell me why no LDP session is established? If nobody know=
s,
> > perhaps someone could direct me to what I should look for in the
> > configurations?
> >
> > Thanks!!
> > =A0
> > ----
> > Mattias Persson (Mat...@op...)
> > Operax AB (www.operax.com)
> > Aurorum 8, SE 977 75, Lule=E5 Sweden
> > +46 (0)920 75536
> >
> >
> >
> >
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>=20
>=20
>=20
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--=20
James R. Leu