The MPLS-OPS Archive

[SR <StudentResearcher@gmail.com>]

Hi,

In theory an MPLS implementation should support both i.e.
Per interface label space and 
also global label space.

But I think global single label space is good as in case of MPLS fast
reroute and penultimate hop label popping, the MP can swap labels
without knowing that the traffic is coming from bypass tunnel or from
the primary tunnel (different interfaces). Recall fast reroute use
label stacking.

On the other hand per interface label space is good as it increases
the number of labels that can be used by a router.

Once again as well as I know both exist in theory, side by side and
ideally should be supported by any implementation.
Check if you can specify labelspace to null and it work ??

Thanks
Faisal Aslam

On Fri, 17 Sep 2004 21:28:37 +0530 (IST), M.V. Padmini
<padmini@genie.iitd.ernet.in> wrote:
> 
> We are in the process of implementing a Test bed for MPLS using linux
> boxes.  Having gone through the mplsadm literature, they seem to be using
> two parameters (label, labelspace) to be associated with each Interface
> for an FEC.  The labelspace is supposed to identify the interface (from
> which it came) where the labels could be same (labels coming from
> different interfaces).
> 
> Is there a need to do this?  If you enforce the uniqueness of the label
> wrt to a FEC, dont u think that there is no requirement for a labelspace.
> Am i missing something?
> 
> Thanks in advance.
> 
> > Abhishek Mittal wrote:
> >> 6> Fix up the MTU size
> >
> > After upgrading to a newer IOS on the Catalyst yesterday, I just added
> > MPLS IP to the 12k router again --- works fine now (with 1512 as MTU on
> > all used interfaces) ...
> >
> > -gg
> >
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