[mpls-linux-general] Re: reg : GRE tunnels .

[Steven V. d. B. <sv...@in...>]

Nothing needs to be changed in ip_gre. De/Encapsulation is done using
the virutal interface. Actually it looks like any other ethernet device
(or more correct general device needing shim header) to the mpls code.

On Sun, 2001-11-11 at 22:26, Sandeep Subramaniam wrote:
> Hi,
> 
> Thanx a lot for the information.
> 
> So , will GRE tunnels work with mpls-0.993 itself or only with the latest
> patch supplied by Mr.James Lieu ?
> 
> This is because I was going thru some kernel code after patching 
> the 0.993 version , especially ip_gre.c and
> it doesn't seem to contain MPLS specific code.
> 
> and also the latest patch doesn't seem to have made it to the
> mailing-list.
> 
> Am I right?
> 
> Cheers,
> Sandeep.
> 
> 
> Sandeep Subramaniam
> Graduate Research Assistant
> ITTC, Raymond Nichols Hall,
> University of Kansas
> 
> 
> 
> On 10 Nov 2001, Steven Van den Berghe wrote:
> 
> > I don't have a pointer at hand right now, but from the top of my hat you
> > need to do something like:
> > 
> > endpoint A: 
> > 	ip tunnel add mode gre remote <address B> local <address A>
> > endpoint B: 
> > 	ip tunnel add mode gre remote <address A> local <address B>
> > 
> > This will create a new (virtual) point-to-point interface on both ends,
> > which can be used as any other (ethernet-type) interface. This should
> > work both with our extensions (including RSVP-TE) as the original
> > version of Jim (including LDP).
> > 
> > If you need more help, just let me know. For more information on the
> > "advanced" linux networking stuff (like GRE, policy routing, ...) i
> > would suggest to have a look at 
> > 
> > http://www.linuxdoc.org/HOWTO/Adv-Routing-HOWTO.html
> > 
> > Best regards,
> > Steven
> > 
> > On Sat, 2001-11-10 at 01:27, Sandeep Subramaniam wrote:
> > > Hi,
> > > 
> > > As I had mentioned in my previous email , I need to do MPLS in IP
> > > encapsulation at the ingress and decapsulation at the egress.
> > > 
> > > You suggested that I use GRE tunnels for this purpose .Thanks for the
> > > idea.
> > > 
> > > If I am not wrong, the delivery header shall be IPv4 header and the
> > > payload packet a MPLS pkt with the GRE header in-between.
> > > 
> > > Since I am new to using your MPLS implemenation , can u tell me how to set
> > > up GRE tunnels to do MPLS in IP encapsulation .
> > > 
> > > or can u give me a pointer to some documents explaning that ?
> > > 
> > > Thank you very much
> > > Sandeep. 
> > > 
> > > Sandeep Subramaniam
> > > Graduate Research Assistant
> > > ITTC, Raymond Nichols Hall,
> > > University of Kansas
> > > 
> > > 
> > > 
> > > On Tue, 30 Oct 2001, Steven Van den Berghe wrote:
> > > 
> > > > You can use GRE tunnels to accomplish that. I think the latest
> > > > mpls-linux shouldn't have a problem with that.
> > > > Just create the tunnel over the IP network, and use the created
> > > > pseudo-device as a normal device.
> > > > 
> > > > bye,
> > > > Steven
> > > > 
> > > > Sandeep Subramaniam wrote:
> > > > 
> > > > > Hi,
> > > > >
> > > > > Has anyone tried to implement MPLS in IP encapsulation in the kernel?
> > > > >
> > > > > ie wrapping the MPLS pkt created at the ingress with an IP hdr.
> > > > >
> > > > > Any ideas ?
> > > > >
> > > > > Thanx.
> > > > > Sandeep.
> > > > >
> > > > > Sandeep Subramaniam
> > > > > Graduate Research Assistant
> > > > > ITTC, Raymond Nichols Hall,
> > > > > University of Kansas
> > > > >
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> > > > > mpl...@li...
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> > > > 
> > > > --
> > > > Steven Van den Berghe
> > > > ste...@in...
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> > > > 
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> > > 
> > -- 
> > --
> > Steven Van den Berghe
> > ste...@in...
> > Workgroup Broadband Communication Networks
> > Department Information Technology
> > Ghent University - Belgium
> > Phone:  +32 (0)9 267 35 86 | Fax  :  +32 (0)9 267 35 99
> > *-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
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> 
-- 
--
Steven Van den Berghe
ste...@in...
Workgroup Broadband Communication Networks
Department Information Technology
Ghent University - Belgium
Phone:  +32 (0)9 267 35 86 | Fax  :  +32 (0)9 267 35 99
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
DiffServ over MPLS for Linux: http://dsmpls.atlantis.rug.ac.be
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*
A computer is like an Old Testament god, with a lot of
rules and no mercy. - Joseph Campbell
*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*-*