[cisco-voip] Switch STP problem

[Mike Reilly]

This is off a 3550 the rest of the configs on there are for auto qos, you do
not need to trunk the ports
interface FastEthernet0/2
 switchport access vlan 109
 switchport mode access
 switchport voice vlan 209
 no ip address
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone 
 wrr-queue bandwidth 20 1 80 1
 wrr-queue min-reserve 1 5
 wrr-queue min-reserve 2 6
 wrr-queue min-reserve 3 7
 wrr-queue min-reserve 4 8
 wrr-queue cos-map 1 0 1 2 4
 wrr-queue cos-map 3 3 6 7
 wrr-queue cos-map 4 5
 priority-queue out
 spanning-tree portfast

-----Original Message-----
From: cisco-voip-bounces at puck.nether.net
[mailto:cisco-voip-bounces at puck.nether.net] On Behalf Of kevin knowlen
Sent: Saturday, November 13, 2004 2:26 AM
To: cisco-voip at puck.nether.net
Subject: [cisco-voip] Switch STP problem

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
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