Spanning-tree issue with VSS

[S891]

Is there a special consideration for spanning-tree in VSS setup? We recently upgraded a pair of 6500s (non-VSS) to 6807 (VSS). The setup is exactly the same and config is similar. But we ran into high CPU issue which turned out to be a layer 2 issue (possibly STP). 

I am wondering if we missed anything in the VSS setup that is unique.

[Mark Malone]

Hi

there should be no diff between those platforms in terms of STP

here is the best practice doc for VSS STP in case you've missed something but if it was working on 6509 should be same for 6807

http://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Campus/VSS30dg/campusVSS_DG/VSS-dg_ch3.html#wp1079779