Fischer,
That sounds like something my friends and I could handle here, namely, doing
the MPLS
frame-mode exercises on the FR devices.
Taking the next step to ATM cell-mode MPLS, I wonder if you or anyone else
on the list
might know if there's an inexpensive way to emulate an ATM switch. We can
emulate FR
switches using low-end routers (2600's) and the "frame-relay route interface
" command. Translating that to ATM with my personal low-budget
resources would require an affordable ATM card or module for the 2600
routers or
possibly an ATM DSU (ADSU) external to the router. It also assumes that the
2600 IOS
would support ATM switch emulation as it does FR switch emulation. Maybe
that's an
unrealistic assumption. I'd appreciate references if anyone knows.
Reference: I'm getting some of this from chapters 7-9 of Galina Pildush's
"Cisco ATM
Solutions". She discusses AIPs, PAs, NMPs and ADSUs.
I hope everyone understands that I'm not trying to reinvent ATM here. My
purpose is not
to specify a low-budget ATM production network that will replace LS 1010
clouds but to
explore whether cash-challenged students such as myself can set up an
affordable,
low-budget ATM lab in the local Cisco Academy or in the personal labs we
have in our
basements.
Cheers,
-- TT
Fischer Reinhold wrote:
> Tom,
>
> i have only practiced MPLS in Frame Mode. 1x4500, 1x4700, 1x3600 as the
> Provider Backbone, and 4 small routers as CE devices. 2 Backbone routers
> ('PE') should also do the job but with a third as a pure 'P' router it gets
> more realistic (no BGP needed on the P router, is not aware of customer
> networks, does only label switching from ingress to egress for customer
> data. I just studied the information in the book regarding cell mode MPLS.
> Frame Relay would not help because it behaves like Frame Mode MPLS. For
> practicing CellMode MPLS you would need MPLS aware ATM switches which was
no
> option for me ...
>
> hth
>
> Reinhold
>
> Tom Scott wrote:
> >
> > Reinhold,
> >
> > What did you use for the lab? I'd like to practice with MPLS
> > but it
> > appears that I'd need ATM. Or did you use FR, and if so, were
> > you still
> > able to do enough exercises to understand how MPLS would work
> > over ATM?
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