Change configuration on Catalyst 3560

lformelli · ‎03-24-2010

Hi,

I have an a switch 3560 with IOS c3560-ipbase-mz.122-35 where from port fa 0/1 until port fa 0/22 thera are connected

22 AP Cisco 1242.

On this ports I have configured only "switchport access vlan 3", which is vlan for wi-fi.

Yesterday, for each of this ports I have found:

switchport nonegotiate

switchport mode trunk

switchport trunk encapsulation dot1q

mls qos trust cos

auto qos voip trust

spanning-tree bpduguard enable

and was impossible reach AP and my guest could not surf on Internet.

What can be happen ?

Why did switch change configuration ?

Best regards

Lorenzo

Giuseppe Larosa · ‎03-25-2010

Hello Lorenzo,

have you deployed autoQoS recently?

but I would not expect a change of switchport mode.

one possibility is: someone applied a wrong interface range in an attempt to configure some ports as trunk that included these ports

if the device is under TACACS+ you can check the commands applied to the switch to verify if commands have been added in some way.

Hope to help

Giuseppe

lformelli · ‎03-25-2010

Thank you Giuseppe

with your answer I have understood

that's impossible to change configurations itself.

best regards

Lorenzo