03-05-2006 11:48 AM - edited 03-03-2019 02:07 AM
I've run into a strange problem.
3560 switch, connected to a 7940 phone, port config as shown below.
I can connect some PC's (Windows 2000 and XP) to the phone and the config works as advertised (phone gets the voice vlan and the PC gets the data vlan.)
However, other PC's (just your average Dell or HP PC's) will not work at all unless the voice vlan is totally removed from the config, leaving both the phone and the PC on a single vlan. It obviously is some kind of weird mismatch between the PC and the switch port, but I am at a loss to make it work.
I've tried it all, static IP addresses on the PC for both the voice and data vlan. What have I missed?
Any suggestions?
3560 24 Port POE switch
Port config as follows
interface FastEthernet0/1
switchport access vlan 100
switchport mode access
switchport voice vlan 200
srr-queue bandwidth share 10 10 60 20
srr-queue bandwidth shape 10 0 0 0
mls qos trust device cisco-phone
mls qos trust cos
auto qos voip cisco-phone
spanning-tree portfast
spanning-tree bpduguard enable
03-05-2006 12:28 PM
Hello,
I remember a similar problem, removing the 'spanning-tree bpduguard enable' command might help, can you try this ?
Regards,
Nethelper
03-05-2006 12:53 PM
I'll check it out. This current problem exists in a remote office but I plan on duplicating it in a lab environment this week at the HQ.
03-16-2006 09:03 AM
did you find the solution?, i have the same problem, but the ip phone is a 7912g-a, just if both are in the same vlan, but if i use a 7912 g or 7960 it works.
switchport access vlan 2
switchport mode dynamic desirable
switchport voice vlan 1
switchport priority extend cos 3
mls qos trust cos
spanning-tree portfast
06-10-2015 11:36 AM
Have you tried something like this? :
interface FastEthernet0/1
switchport mode trunk
switchport trunk native vlan 100
switchport voice vlan 200
switchport trunk allowed vlan 100,200
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