The MPLS WG Archive

[Robert Raszuk <raszuk@cisco.com>]

Let me clarify this one a bit:

> Shahram:
> I think you have misunderstood the point. What I/Neil were suggesting was
> keeping the inner label and using IP header instead of the top MPLS
> label. There is no tunnel to be created (IP is cnls) and PEs can be added dynamically.

This extra IP header you are adding in the front of the inner MPLS label
is an "ip tunnel" ;-).

> Ajay:

> > If you run LDP,
> > you can add PEs dynamically without having to go an creat
> > some tunnel between
> > this PE and all other PEs. If you use IP for this every time
> > you have a new PE
> > you'll have to create end to end tunnels so that the
> > mid-points don't drop the
> > packet because they have no earthly idea how  this private
> > address on the
> > packet should be routed.

The same dynamic way can be done here as well. There is no need to set
anything manually so this extra header Shahram is refering to can be
dynamically infered from information present already on PEs.

R.