Picture:
Service provider network, numerous MPLS VPNs.
Task:
Do scalable routing export/import between customer's and management VPNs. Only required routes should be imported, so not overwhelming management VRF's routing table with all customer's routing.
The way I want it to look like:
Every customer gets some private subnet for equipment management needs. Size depends on addresses required.
If device I need to manage is some router in customers VRF - everyting is clear - I create loopback interface on it, assign it an /32 address and everything is fine. Question is what to do with layer 2 switches, what can have (???) only one IP interface?
As far as I know - I can't create loopback interfaces on L2 switches (2940, 2950). Do I realy have to assign an /32 subnet for each of them? Or there is more scalable and sane way? Wasting private addresses by assigning /30 instead of /32 isn't a problem of course :), but a way to use only one address per device would be much better. Any ideas or experience to share?
