[c-nsp] Flat MPLS service from provider

[D W]

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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