[c-nsp] Migration from single L2 to multiple VLAN/subnet scenario

[David Coulson]

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Mark Tohill wrote:
> I'm wondering what the most suitable first step is in this process and would it be best, for example, to create a VLAN (not VLAN 1) to contain all existing traffic covering both subnets i.e a Legacy VLAN. Then, over time, as equipment gets re-addressed, create VLAN's/subnets as required. So the above would get sepeated into two VLANS. With further subnetting, four, and so on.

That's basically what we did. We threw the legacy network into one VLAN,
then one by one moved subnets off into their own VLANs and renumbered
other networks as we went. I think we've got close to 90 VLANs now, and
there still a couple left over that need to be migrated.

Don't expect to do it quickly, that's for sure. :-)

David
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