Re: [mpls-linux-general] trouble setting up LSPs

[Wayne W. S. <ww...@ho...>]

I checked the drop counter on the outlabels on all the machines and they
are all zero.  The following are from /proc/net/mpls* on each machine:


On A:
=====
[wwszeto@csgradpc03 net]$ more mpls_*
::::::::::::::
mpls_in
::::::::::::::
0x40005000 7533/10804580/0 gen 20 0 7534 POP PEEK
::::::::::::::
mpls_labelspace
::::::::::::::
eth0    0       12
::::::::::::::
mpls_out
::::::::::::::
0x00000006 4126/219279/0 1 PUSH(gen 16) SET(eth0,10.0.0.20)
::::::::::::::
mpls_tunnel
::::::::::::::
[wwszeto@csgradpc03 net]$ ip2 route
10.0.1.30 via 10.0.0.20 dev eth0 lsp 0x6
10.0.0.0/24 dev eth0  scope link
10.0.1.0/24 dev eth2  scope link
129.97.78.0/24 dev eth1  scope link
10.1.0.0/24 dev eth3  scope link
127.0.0.0/8 dev lo  scope link
default dev eth1  scope link

On B:
=====
[root@node02 net]# more mpls*
::::::::::::::
mpls_in
::::::::::::::
0x40004000 4126/235805/0 gen 16 0 1 POP FWD(0x00000002)
0x40005000 7533/10804580/0 gen 20 0 1 POP FWD(0x00000003)
::::::::::::::
mpls_labelspace
::::::::::::::
eth0    0       9
eth1    0       8
::::::::::::::
mpls_out
::::::::::::::
0x00000002 4126/219301/0 2 PUSH(gen 16) SET(eth1,10.0.1.30)
0x00000003 7533/10774448/0 2 PUSH(gen 20) SET(eth0,10.0.0.10)
::::::::::::::
mpls_tunnel
::::::::::::::
[root@node02 net]# ip2 route
10.0.0.0/24 dev eth0  scope link
10.0.1.0/24 dev eth1  scope link
10.1.0.0/24 dev eth2  scope link
127.0.0.0/8 dev lo  scope link
default via 10.0.0.1 dev eth0

On C:
=====
[root@node03 net]# more mpls*
::::::::::::::
mpls_in
::::::::::::::
0x40004000 4126/265835/0 gen 16 0 4127 POP PEEK
::::::::::::::
mpls_labelspace
::::::::::::::
eth1    0       9
::::::::::::::
mpls_out
::::::::::::::
0x00000003 7575/10783790/0 1 PUSH(gen 20) SET(eth1,10.0.1.20)
::::::::::::::
mpls_tunnel
::::::::::::::
[root@node03 net]# ip2 route
10.0.0.10 via 10.0.1.20 dev eth1 lsp 0x3
10.0.0.0/24 dev eth0  scope link
10.0.1.0/24 dev eth1  scope link
10.1.0.0/24 dev eth2  scope link
127.0.0.0/8 dev lo  scope link
default via 10.0.0.1 dev eth0


On Wed, 11 Sep 2002, James R. Leu wrote:

> OK.  So the bug must still exist.  What are the symptoms you see?
> Are there any kernel opps?  My guess is that mpls-linux is dropping
> the frames because it thinks they are too big (>MTU).  So you should
> see the drop counter increasing on an outlabel somewhere in the network.
> (in /proc/net/mpls_out their is a trio of numbers for each entry in the
> form 0/0/0, drops is the last number)
>
> Jim
>