[mpls-linux-general] LDP session failure

[Rudy S W. <rs...@an...>]

Hello,

I've downloaded the new ldp-portable and zebra-ldp from James' p4 server,
then recompiled with the zebra/ldp with both new versions (installed
mpls-linux-1.1, iptables, iproute2, ppp, glibc, with rpm from mpls
homepage). I'm trying to test the ldp label distribution of ldp-portable.
My topology is just two 2.4.18 red hat machines directly connected.  I can
run zebra and ospfd daemons and see ospf neigbors.

Currently:

 on comp A:
 uml-1-ospf# sho ip ospf nei

 Neighbor ID     Pri   State    Dead Time  Address         Interface
        RXmtL RqstL DBsmL
  192.168.0.2     1    Full/DR  00:00:34   10.3.3.6       eth1:10.3.3.5
        0     0     0

  on comp B:
  uml-1-ospf# sho ip ospf nei

  Neighbor ID     Pri   State        Dead Time  Address         Interface
        RXmtL RqstL DBsmL
  192.168.0.2     1     Full/Backup  00:00:33   10.3.3.5     eth1:10.3.3.6
        0     0     0

My goal is to start an ldp session and see the LDP peers exchange labels.
After I start mplsd I can see both comp A and comp B see ldp neighbors
with "show ldp neighbor".
However, on comp A  machine the debug messages come up with:

on Comp A
connect: Network is unreachable
OUT: ldp_session_attempt_setp: MPLS_FAILURE

On comp A
uml-1#show ldp session
2 192.168.0.2 0 NON-EXIST

but for comp B
there's no MPLS_FAILURE

uml-2#show ldp session
  no established sessions

When I run mplsd with "mpls ldp" in the mplsd.conf, it gives me a
segmentation fault, and i ran it in gdb looks like vty is looking for an
interface.

I start mplsd in gdb and run it without the "mpls ldp in the mplsd.conf,
then i manually enable mpls ldp by telnet to mplsd.  After that I can see
that both machines can see each other with "show ldp neighbor".  However,
when i try to show ldp discovery, sometimes it seg faults with this
message:

 in ldp_cfg_entity_get.... at ldp_cfg.c:341
341 e->adj_index = a ? a->index : 0;

I'm sorry there's so much in this email, I've been struggling to get mpls
up and running.  Thanks for any help you can give me.

~rsw