troubleshooting Question

Traffic dropping between Cisco 2960 s and HP Procurve 2910a1

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tamray_tech asked on
CiscoNetworkingSwitches / HubsNetwork Management
5 Comments2 Solutions684 ViewsLast Modified:
I am working with a school that uses VOIP. The network ran fine until yesterday. The school does not believe they changed anything, but the network is unstable.  Each desktop runs through the Cisco phone for network connectivity. The phone is vlan 72, the desktop PC is on vlan 1. Pings to anything on vlan 1 will run for a minute, or so and then drop for 15-30 seconds. If I eliminate the Cisco and connect a desktop directly to the HP Procurve, vlan 1 traffic is flawless..

I get the following error on the cisco, but maybe its more than informational:
SPANTREE-2-RECV_BAD_TLV: Received SSTP BPDU with bad TLV on GigabitEthernet1/0/48 VLAN1.
it repeats itself every few minutes.

I have disabled all ports, but one phone (with desktop) and the trunk port. The problem still persists.

Cisco trunk port config:

Tried both ports 47-48

interface GigabitEthernet1/0/47
 description ** Uplink to Core2 **
 switchport mode trunk
 srr-queue bandwidth share 10 10 60 20
 queue-set 2
 priority-queue out
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 spanning-tree portfast
 service-policy input AUTOQOS-SRND4-CISCOPHONE-POLICY

The tried this port:

interface GigabitEthernet1/0/48
 description ** Voice Uplink to LCTN **
 switchport trunk allowed vlan 72,1,109,110,111
 switchport mode trunk
 srr-queue bandwidth share 10 10 60 20
 queue-set 2
 priority-queue out
 mls qos trust device cisco-phone
 mls qos trust cos
 auto qos voip cisco-phone
 spanning-tree portfast
 service-policy input AUTOQOS-SRND4-CISCOPHONE-POLICY

HP Port to Cisco switch:

Vlan 1 untagged
Tagged all other Vlans


I believe it could be a spanning tree issue. If so, I would need assistance with the proper commands on each switch to set priority, etc...


The stack consists of 2 Cisco 2960s and 1 Procurve 2960
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