Problems with Cisco 2960X

[Twilo]

Hi all, 

I need your help regarding some issue with 2960X. 

I'm running MD version  c2960x-universalk9-mz.152-2.E6.bin, but for some reason some PCs lost Ip address random, and Ip phones (Alcatel) for some reason reboots, but not always. 

Have you seen this problem before?? 

We have 3  WS-C2960X-48FPD-L in stack, before with 2960S all worked ok. 

Regards

[Julio E. Moisa]

Hi

Any logs are generated during these events?

[Twilo]

Hi Julio,

thanks for your reply, no logs.

I have log from Alcatel Phone;

20/07/17 02:48:49 000002M|19/03/0/052|=3:0378=IP Phone sig incident 6,(19,1),00:80:9f:76:be:71,3437

20/07/17 02:51:09 000002M|00/00/0/000|=4:0426=IPTOUCH terminal reset 13,(0,0),00:80:9f:76:be:71,3437

20/07/17 05:48:47 000002M|19/03/0/052|=3:0378=IP Phone sig incident 6,(19,1),00:80:9f:76:be:71,3437

20/07/17 05:51:07 000002M|00/00/0/000|=4:0426=IPTOUCH terminal reset 13,(0,0),00:80:9f:76:be:71,3437

20/07/17 11:47:18 000002M|19/03/0/052|=3:0378=IP Phone sig incident 6,(19,1),00:80:9f:76:be:71,3437

20/07/17 11:49:39 000002M|00/00/0/000|=4:0426=IPTOUCH terminal reset 13,(0,0),00:80:9f:76:be:71,3437

20/07/17 12:09:51 000002M|19/03/0/052|=3:0378=IP Phone sig incident 6,(19,1),00:80:9f:76:be:71,3437

20/07/17 12:12:11 000002M|00/00/0/000|=4:0426=IPTOUCH terminal reset 13,(0,0),00:80:9f:76:be:71,3437

Terminal reset due a UDP packet lost (error 13).

It could be QoS??

Regards

[Julio E. Moisa]

Hi Mauro,

It doesn't look like QoS problem, also I see you have the latest IOS released. Have you identified if the problem is on the 3 switches or just on one?

[Twilo]

Thanks Julio

the issue is with 3 devices, before with 2960s all worked ok.

regards.

[Julio E. Moisa]

Thank you Mauro,

Is possible to provide the config?

[Twilo]

Sorry,

it's not possible but the config is the same as the previous 2960S

regards

[Julio E. Moisa]

Thank you Mauro, it is ok.

The Cisco 2960X is a very good switch, so it think it could be a bug, if you have contract with Cisco I recommend open a case with the Cisco TAC.

Prior, could you please verify the outputs of the following commands:

show switch

show switch stack-ports

[Twilo]

Hi Julio

#show switch stack-ports
  Switch #    Port 1       Port 2
  --------    ------       ------
    1           Ok           Ok  
    2           Ok           Ok  
    3           Ok           Ok  

#show switch            
Switch/Stack Mac Address : 6899.cdfc.b900
                                           H/W   Current
Switch#  Role   Mac Address     Priority Version  State
----------------------------------------------------------
*1       Master 6899.cdfc.b900       15     4       Ready              
 2       Member 00e1.6d5b.3100     13     4       Ready              
 3       Member 00e1.6d66.2c00     11     4       Ready              

yes I have case with Cisco TAC.

regards

[Julio E. Moisa]

Hi Mauro,

Great, yes, your stack looks fine. 

Please keep us posted about the findings by the Cisco TAC. 

[paul driver]

Hello

Curious, What discovery protocol are you using  CDP/LLDP?

Show LLDP errors
Show CDP traffic.

access-list 100 permit udp any any
debug condition interface X/X
debug ip packet detail 100

res
Paul

[Spooster IT Services]

Hi Mauro Ciccone,

Where is DHCP server configured?

Can you please attach the show tech of your switch?