We have Catalyst 6500s at our core / distribution layer, and I would like to convert them from PVST to RPVST. However, we still have some 3500XLs at the access layer which will not be retired until next year. I see from the document that RSTP (802.1W) and RPVST are not supported on the 2900XL and 3500XL.
Is it possible to have a network with RPVST at the core layer and still run regular PVST at the access layer?
yes you can run both within the same network but be aware that if you have a vlan that spans across both the core and access-layer switches then you will not see the full benefits of RPVST because it will default back to normal STP for that vlan.