The MPLS WG Archive

["Cheng-Yin Lee" <leecy@nortelnetworks.com>]

Kireeti,

Kireeti Kompella wrote:

> Hi Vijay,
>
> > Then we start to add hierarchy here. One design being the lets mesh the
> > aggregation routers instead of the edge routers. Problem with that design
> > is that now the MPLS domain does not go all the way to the edge, causing
> > the edge to slosh ip traffic flows based on topology changes inside your
> > network, causing your bandwidth settings on LSPS to fail miserably, as
> > traffic may now start traversing LSPs which were previously (thanks to the
> > wonders of SPF) never loaded, thus the automatic TE scripts set their
> > reserved bandwidth to 0.
>
> So you advertise the LSPs into your SPF, and give them a fixed metric.
> Now your SPFs behave: end of slosh.  (Confess!)

Could you elaborate how this scheme works, how this solves the problem
described by Vijay above?

thanks,
cyl