Spanning Tree VLAN Priority Issue

Question

We have two 6500E switches and running spanning tree with rapid-pvst.We have also configured per vlan spanning tree priority with 100,200 so odd vlan have one switch hight priority and even vlans have  another switch high priority.
I have created new vlan 10 and tring to add spanning tree priority to the switches i am getting the following error
Core-switch(config)#spanning-tree vlan 10  priority 100
% Bridge Priority must be in increments of 4096.
% Allowed values are:
  0     4096  8192  12288 16384 20480 24576 28672
  32768 36864 40960 45056 49152 53248 57344 61440
Can some experts help me why i am getting the above message and how can i add the priority to the same as existing vlans

Answer 1

Hi ,
 Spanning tree priority can be set in increment of 4096 , any other values will be rejected . if you want to know about priority value of existing vlan execute command show spanning-tree vlan X / show spanning-tree command which will show you switch priority value 
Step 2 
spanning-tree vlan vlan-idpriority priority
Configure the switch priority of a VLAN.
•For vlan-id, you can specify a single VLAN identified by VLAN ID number, a range of VLANs separated by a hyphen, or a series of VLANs separated by a comma. The range is 1 to 4094.
•For priority, the range is 0 to 61440 in increments of 4096; the default is 32768. The lower the number, the more likely the switch will be chosen as the root switch.
Valid priority values are 4096, 8192, 12288, 16384, 20480, 24576, 28672, 32768, 36864, 40960, 45056, 49152, 53248, 57344, and 61440. All other values are rejected.
HTH
Sandy