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Migration from FDDI to 10/100/1000

Migration question here.....

Hello all, I have a question for anyone who has experience with this. I have 2 4006 CAT's supporting about 8 vlans in the vlan database. I currently have the production LAN / and most servers on some 3com 2500 series FDDI switches. I want to migrate to the 4000's but I'm not sure about moving all the server's @ once to GIG or to migrate slowly. If I migrate slowly I can't really have more than 1 uplink to the 2500's (100mbps ethernet port) because If I do that I think that may create a spanning-tree loop. 3com has there own implementation of spanning tree and thus this holds me down to only one 1 uplink (bottle neck). This one link will be the ONLY uplink back to the LAN servers. I can only assume that this will be POOR performance to say the least. Does anyone have any migration experience or advice for me .

Thanks in advance,


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