I have "inherited" a net (currently running 49 vlans) which has a mix of ~110 relatively new Cisco 2950C/2950T/2950G switches plus older Cisco 2924XL/3548XL and also one new HP ProCurve 2824. The majority of all vlans extends across all switches. All trunks are802.1Q and all switches currently only have one uplink port. Spanning-tree is running on all (but I can't say I'm sure it works as it should) therefor the following questions (you'll have to excuse a newbie in this area).
Approx. layout:2824 2950G 3548XL 2950C 2950C 2924XL ... | 2950 2924XL 2924XL 2950T ... | 2924XL 2924XL ...
hp2824-1# sh span Regular Spanning Tree Information STP Enabled : Yes
c2924-1#sh span Spanning tree 1 is executing the IEEE compatible Spanning Tree protocol
c2950g-48-1#sh spanning-tree summary Switch is in pvst mode
#1. Will current spanning-tree really work throughout the net if all switches has STP enabled (as shown above) while the Cisco 2950 models with enhanced image are running in pvst mode ? As I understand it all but those are running one spanning-tree per switch while those with enhanced are running one per vlan...
#2. Is it possible in this setup, and will I gain something, having the HP switch plus all Cisco switches with enhanced image run RSTP/RPVST instead ? Will spanning-tree still work across all switches ?
Comments anyone ?
P.S I know the current layout isn't the best but its what I have to live with for now. I cannot afford replacing all old switches with newer models...