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New Member

3750E stack strange failure

Hi all,

I'm experiencing this issue:

Last night occurred a strange failure of the Master of the stack:

It became unavailable and was removed from the stack like it was powered off.

This morning looking the catalyst it was powered on but with all leds (stat,master,system, ecc) powered off. Only the led ports were flicking in amber.

Very strange!!!

Rebooting the member all come back normal...until now

After this, taking a look on the configuration I found the command " no access-session template " on some ports of a 3750E member of a stack

Sample of output:

interface GigabitEthernet3/0/14

switchport mode access


no access-session template

I searched about it  but i have not found anything. I tried to remove it but no way the command seems to be not present

This probably occurred after the strange failure of the Master of the stack as described about.

The software version is c3750e-universalk9-mz.150-1.SE

The last information i can give is that the actual master of the stack is the member 3 of the stack  (the same that have in some ports the command "
no access-session template" configured.

Someone can give me an help?

Many thanks to all

Best Regards

Everyone's tags (3)
VIP Super Bronze

3750E stack strange failure


What happens if you do a "no sh" on the port 3/0/14? Can you deleted "no access-session template" command than?

This may be a bug in IOS 15. I wonder if a downgrade to 12.2(xx) will remove this command.  Very strange


New Member

3750E stack strange failure

Hi Reza,

thanks for your reply.

Rebooting all the stack the command now i missing.......

VIP Super Bronze

3750E stack strange failure

Also, it there a crash file written in your flash?

Do the logs give you any further info?

New Member

3750E stack strange failure

well rebooting the member in failure it came up normally......all is very strange!!