Cisco WS-X6066-SLB-APC - Content Switching Module Software Manual page 133

Chapter 8 Configuring Spanning Tree
Using PVST+
Do not disable spanning tree on a VLAN unless all switches or routers in the VLAN have spanning
Caution
tree disabled. You cannot disable spanning tree on some switches or routers in a VLAN and leave
spanning tree enabled on other switches or routers in the VLAN. If spanning tree remains enabled on
the switches and routers, they will have incomplete information about the physical topology of the
network which may cause unexpected results.
Catalyst 6000 Family Software Configuration Guide—Releases 6.3 and 6.4
8-21
78-13315-02