The latter option is what it sounds like they're offering.  My
understanding is that our routers would still need to run a routing
protocol to advertise local rotues to the SP, but they'd only actually
use a default route pointing back to the SP.

According to them--or at least the sales drone I was talking to--if we
chose this option we'd have to use addressing provided by them.  From
what all of you have been saying this doesn't seem to be necessary.  

I really need to do some reading and get up to speed on this, but it's
going to have to wait at least five more weeks.  :-)

Thanks,
John

>>> Peter van Oene  2/28/02 8:55:38 AM >>>
This really depends on whether or not they are pitching a Layer 2 VPN 
service or a Layer 3 VPN service.  With the former, there shouldn't be
much 
of any reconfig at your end as the transport mechanism with the SP will

remain transparent to you.  With the latter, you'd would transition
much of 
your routing control (inter-office) to the SP.  In that case, you could

default into the SP cloud at each site making things rather simple. 
Your 
gear would not need to be MPLS aware.  The service provider would
maintain 
an isolated routing domain specific to your enterprise and would use
MPLS 
purely as a transport mechanism across its own backbone in effect
isolating 
your traffic from its other customers.

At 12:23 PM 2/27/2002 -0500, John Neiberger wrote:
>Okay, I'm about to show how clueless I am when it comes to MPLS....
>
>I've been getting calls from multiple providers lately all trying to
>suggest that I migrate our 100-site frame relay network to their MPLS
>network, suggesting that we'll have any-to-any connectivity and the
>ability to prioritize traffic classes within the MPLS network.
>
>Are any of you doing something like this?  I'm going to read up on it
>but I'm having trouble visualizing it.  Does this basically turn our
>network into a giant multipoint network?  Do our branch routers need
to
>be aware of MPLS or do providers make this transparent somehow?  How
>does this affect routing?
>
>It seems that if we have any-to-any connectivity then the branch
>routers don't even need to run a routing protocol; every router would
>have one exit point to get to any destination.  But, how would the
MPLS
>cloud know where to route packets?  The more I think about it it
seems
>like our branch routers would have to participate in MPLS to provide
the
>necessary destination info for the MPLS cloud.
>
>See how clueless I am?  Ugh...  Time to do some studying on this.
>Since we already do a little video conferencing over IP and are
working
>on getting VoIP working, it might be beneficial to get away from the
>frame relay network.  But since I don't understand this new
technology,
>I don't know if it's  a viable solution for us or not.
>
>Off to CCO I go!
>
>Thanks,
>John




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