[cisco-voip] Switch STP problem

[kevin knowlen]

All,

We have a problem with STP convergance.  We have a gigabit switched
network, using a combination of 3500, 3550, 3560 switches.  We use the
below switch config.  According to Cisco documentation, spanning-tree
port fast is susposed to prevent the voice vlan port from
participating in STP.  We even put bpduguard on the port.  We tested
the config and switches up stream still re-converge all the way up to
the CORE, when a IP phone is unplugged.

Interface fa 0/2
switchport mode trunk
switchport trunk encapsulation dot1q
switchport voice vlan XXX
switchport trunk native vlan XX
spanning-tree portfast
spanning-tree bpduguard enable


-- 
1LT Knowlen, Kevin