A customer hads lots of Cisco 2950 switches. They can support hundreds (perhaps thousands) of VLANs. We use VTP and that supports 250 VLANs. We use 'spanning-tree mode pvst' which can create a spanning-tree instance for 64 VLANs. From the 65th VLAN onwards we get this line added to the 2950 config:
no spanning-tree vlan 43,120,132
We presume that is is because PVST on the 2950 can only handle 64 VLANs.
would like to know if this will cause problems for the 65th, 66th, 67th VLANs? We do not put loops in the network at present.
Should we use a different spanning-tree mode?