[c-nsp] Flat MPLS service from provider

[Stig Johansen]

Hi.

I can't see any big problems with a flat vpn-cloud considering the
following:
- The sites should ideally use a default route into the cloud.
- The sites should have no requirement for segregation inside the cloud.
- The sites should have absolutely common policies regarding all routing
decisions and gateways in/out of the cloud.

Exactly what kind of distributed services are you thinking about?

Best regards,
Stig Meireles Johansen

-----Original Message-----
From: cisco-nsp-bounces at puck.nether.net
[mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of D W
Sent: 9. juli 2008 19:59
To: cisco-nsp at puck.nether.net
Subject: [c-nsp] Flat MPLS service from provider


Hello,

Does anyone on this list manage a network or have customers that run a
large (500+ sites, scaling up to 1000) flat (single vrf) enterprise
network. If so, can you share any lessons learned from this service as
opposed to building a hierarchal design (ordering multiple VRF clouds
from a provider - core cloud, regional cloud, etc..). I'm in the process
of identifying potential issues for a customer considering a flat
network design model. Their network is currently regionalized with
point-to-point circuits.

Two of the first that came to mind were:

- Summarization (could only do per site, no large regional summarization
blocks). Unless defaults are used.

- Difficult to deploy distributed services with no aggregation sites.


Thanks,
Dave

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