Re: [mpls-linux-general] MPLS-Linux 1.160 and kernel integration

[Pim V. H. <pim...@in...>]

On Wed, 2002-08-28 at 17:55, James R. Leu wrote:
> On Wed, Aug 28, 2002 at 04:48:14PM +0200, pim...@in... wrote:
> > Hi James,
> > 
> > I just tried MPLS-Linux 1.160 with the RSVP daemon and it seems that
> > things are stable now (I havent been able to crash the kernel so far).
> > Joy!
> 
> This is a good thing :-)
> 
...
> 
> Do you have any additional code that you add to the base mpls-linux
> kernel patch?  I know at one point there were some additions that dsMPLS
> needed.  Is this still the case?
No, we now have counters and great Diffserv support. 

We still need to patch the kernel for two reasons:
* prevent dsmark from copying the DSCP to tcindex (is done by
EXP2TCINDEX)
* a hack to map DiffServ over IP and DiffServ over MPLS traffic to the
same queue ("tc filter" insists on having a protocol field)

But I dont think they belong in your MPLS patch, do they? These issues
only arise if you want to have a mixed Diffserv over IP and MPLS. (And
you really want that because you want a separate control packet(=IP)
queue.)
> 
> Have you tried creating a zebra front end to your RSVP-TE implementation?
> Would you be interested in such an endevor?  
It sounds interesting to have direct access to the routing tables and
even more powerfull the link state database. (I have written papers
about and developed a scheme where you can reroute LSP very fast based
on the topology information called FTCR). Also having the same CLI for
RSVP and OSPF also seems like a huge plus. 

Problem is that my time is pretty limited and first on my to do list is
getting L-LSP support more or less stable and released.

> I have a decent start on a
> front end to my LDP implementation and the beginings of a static LSP
> implementation.  I think I have worked out many of the issues with adding
> "MPLS" routes to the zebra RIB, and having BGP or other routes resolve
> their nexthops correctly.
> 
> Either way, one of these days I'll get around to setting up your code and
> playing around with it :-)
Great, let me suggest that you wait for the 0.70-rc1 release which comes
with MPLS 1.160.
> 
> Keep up the good work.
Yes, you too, we really appreciate your work. 

Pim.
> 
> Jim
> -- 
> James R. Leu
> 
> 
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-- 
Pim Van Heuven            Ghent University - IMEC
Department  of  Information  Technology   (INTEC)
Sint-Pietersnieuwstraat, 41 B-9000, Gent, Belgium
pim...@in...
        DiffServ/MPLS(RSVP-TE) for Linux:
        http://dsmpls.atlantis.rug.ac.be