Re: [mpls-linux-general] mpls configuration with specific portnumber

[Ramon C. <cas...@in...>]

On Mon, 2 May 2005, Claus Holst wrote:

>
> We are missing some detailed examples that explains how to make a
> configuration that allocates a certain amount of bandwidth for one type
> of data (data on a given port number). Any suggestions where to find
> such examples or how it is done?

Hi all,

This could be done either statically or dynamically, and it combines MPLS
forwarding + traffic conditioning and schedulling. I 've just played a bit
with 1 hop paths, considering the LSP as a virtual interface (e.g mpls0)
and then playing with tc to do the bandwidth management. For multihop
paths, I'm still unsure about how to do it properly.

Imho, the right way to do that is to dynamically stablish the LSP with
resource reservation and then map tht traffic to that LSP.
Resource reservation is still tricksy. It is something that we've had in
mind for a while, but it takes a bit of work. On one hand, a working
signalling protocol, like RSVP in atlantis. We did a few tests for 2.4
kernels (iirc rsvp uses the old userspace-kernelspace interface) and then
a mechanism to actually perform the bandwidth management as requested with
the resource reservation using some kind of schedulling like CBQ. I think
that the first step would be to work on the RSVP daemon, clean it up a bit
and use the new interface. Nevertheless the big question is how to
automate the bandwidth management, how to set up the cbq classes and how
to map labelled traffic to the classes. It's been a while since I've been
working on this, maybe someone more knowledgeable can give you more
concrete indications.

Best regards,
Ramon


>
> Regards
> Claus and Jesper
>
>
>
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