Re: [mpls-linux-general] MPLS tunnels OOPsing kernel

[<igb...@ya...>]

Hi James,

Thanks for the quick reply. 


Here are the commands that we have used (just to make
sure we are doing it right)


mplsadm -AT mpls0
ifconfig mpls0 <ip address> netmask <netmask>
mplsadm -BO gen:200:eth3 -T mpls0
route add -host <ip address>/32 mpls0


That all works OK.


The output of mpls_tunnel is

mpls0 00000000

Then, when try and ping the host everything goes belly
up, this time the ping process segfaulted and errors
were printed to the system log.

Attached is a copy of the  message that we took out of
the syslog.

We can get simple packet marking working and have had
MPLS traffic moving between hosts, it's just when we
start trying to create tunnels.


Again, anymore information we can provide to help with
this, then let me know.


Thanks



--- "James R. Leu" <jl...@mi...> wrote: > I've
seen this as well.  If the tunnel doesn't have
> a valid outgoing
> label it tries to free the packet.  The opps occurs
> when freeing the packet.
> 
> To make sure this is the bug your getting hit with,
> check the contents of
> /proc/net/mpls_tunnel after creating the tunnel and
> binding a label to it.
> If you do not see a hex key (for the outgoing label)
> then the
> tunnel <-> outgoing label binding didn't work.  Let
> me know what you see.
> 
> Jim
> 
> On Thu, Nov 15, 2001 at 02:19:51PM +0000, iain
> barnes wrote:
> > Hi,
> > 
> > 
> > We are using the latest DSMPLS patch against 2.4.9
> to
> > test MPLS and are having trouble creating tunnels.
> 
> > 
> > I was wondering what the status of the tunnel code
> > currently is.
> > 
> > 
> > The problem occurs when we try to send data down
> the
> > tunnel. We can set it up correctly but at the
> moment
> > we try and send data down it, the kernel OOPS's.We
> > haven't tried using any of the DiffServ mapping
> yet,
> > just played with the examples from the standard
> MPLS
> > code.
> > 
> > Is this a known problem/limitation, or are we
> probably
> > doing something wrong.
> > 
> > If tunnels work for other people, then let us know
> > what information we can provide so that we can get
> > this sorted.
> > 
> > Thanks
> > 
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> 
> -- 
> James R. Leu
> 
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