[mpls-linux-general] LDP strange behaviour

[Razvan D. <raz...@gm...>]

Hi,

i have managed to create a network topology where to test MPLS Linux
support and LDP Quagga suport. I have a functional 1.946a MPLS patched
2.6.9 Linux kernel and a 0.800 LDP patched quagga-0.96.4.

The patch was applied succesfully in both cases. I tested the MPLS
enabled kernel using patched iproute2.

In my first phase i created a small OSPFv2 routing topology which
worked fine; the second phase was enabling ldp on that interface;
however i am experiencing some strange problems.

The LDP routers send each other hello messages but no actual
connection seems to be happening. And above all that all the routers
work properly but they aren't using any labels (some of them have all
the interfaces mpls enabled). So everything works fine in my small
topology, but not LDP - which is however working but doesn't to
participate at the actual routing process.

Here are my configuration files for zebra, ospfd and ldpd (it's a
configuration for an egress router)

## zebra configuration file ##
!
! Zebra configuration saved from vty
!   2005/07/29 13:18:31
!
hostname Router
password zebra
enable password zebra
service advanced-vty
!
mpls labelspace 1
!
interface eth0
!
interface eth1
 description ldp-enabled interface=20
 mpls labelspace 1
 ip address 11.0.1.1/30
!
interface lo
 description Loopback=20
!
interface sit0
!
!
line vty
 exec-timeout 0 0
!

## ospfd configuration file ##

! -*- ospf -*-
!
! OSPFd sample configuration file
!
!
hostname ospfd
password zebra
enable password zebra
!
router ospf
  network 11.0.1.0/30 area 0
!
line vty
=09exec-timeout 0 0
!

## ldpd configuration file ##
!
! Zebra configuration saved from vty
!   2005/07/29 13:49:23
!
hostname ldpd
password test
enable password test
!
interface eth0
 description large network interface (no mpls)=20
!
interface eth1
 description egress label enabled interface=20
 mpls ip
!
interface lo
 description Loopback interface=20
!
interface sit0
!
mpls ip
 egress connected
!
line vty
 exec-timeout 0 0
!

I would also want to know how do i choose between all the ldp options
(liberal/conservative retention, downstream on demand, downstream
unsolicited); i didn't manage to find these options using the CLI.

thanks,
Razvan