Re: [mpls-linux-general] problems with classes and iptables

[Adrian P. <adr...@gm...>]

Silly me...

>From the output you provided I can clearly see that it loads the module:

open("/lib/iptables/*libipt_mpls.so*", O_RDONLY) = 3
read(3,
"\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0\240\4\0\0004\0\0\0"...,
512) = 512
fstat64(3, {st_mode=S_IFREG|0755, st_size=4256, ...}) = 0
So the module is not the problem... But I can't tell what the problem would
be...
Hmm... Quick question: is selinux enabled? Do a dmesg | grep -i selinux

Cheers,
Adrian
On Tue, Apr 22, 2008 at 12:08 PM, luc...@li... <luc...@li...>
wrote:

> Hello,
> I'm trying to differentiate traffic flows in MPLS by marking DSCP field at
> the source and using scheduling strategies at the LER.
> I tried to follow the mpls-linux labs for congestion, in which I found
> something similar to my case.
> In that case the steps are:
> 1- mapping DSCP on EXP bits of mpls header
> 2- mapping EXP on the tcindex (scheduling strategy)
>
> In the script by Adrian Popa there are the following commands:
>
> var_best1=`mpls nhlfe add key 0 instructions ds2exp 0xf 0x1A 0x3 exp2tc
> 0x3 0x1 push gen 300 nexthop ath1 ipv4 10.0.5.3|grep key|cut -c 17-26`
>
> iptables -A FORWARD -s 172.16.30.0/24 -m dscp --dscp 26 -j mpls --nhlfe
> $var_best1
>
> the iptables command answers to me:
> iptables: Invalid argument
>
> I've attached also the result of the command:
> strace iptables -A FORWARD -s 172.16.30.0/24 -m dscp --dscp 26 -j mpls
> --nhlfe 0x02
>
> (0x02 is the previously generated key)
>
> I don't understand where's the problem: I've followed the example and it
> seems that the problem is in in the -j target of iptables...
> Could you please help me?
>
>
> Actually what I'd like to do is quite simpler: it would be enough to
> simply give a different mpls label to every class and then associate each
> label (flow) with a scheduling strategy, without marking exp bits...is it
> possible?
> Thanks in advance,
> Luca
>
>
>
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