Memory leak on Catalyst 2960 & 2960S - similar to Bug CSCts52797

[m.litzel]

Hello community,

after upgrading about 35 Catalyst 2960 and Catalyst 2960S to IOS 15.0(2)SE2, we experience a memory leak on several switches. After some days / weeks the switches are not accessible via Console/Telnet/SSH/Web any more. Only SNMP seems to work properly.

Attached users do not experience any decrease in service.

Trying to connect to the console, we get following error message:

"% Low on memory; try again later"

The only (temporary) solution is to reboot the switch. The behavior is similar to Bug CSCts52797.

With regards to the Bug notes this bug should only affect Catalyst 2960 with 64MB of RAM and should already be solved with IOS 15.0(2)SE2.

We experience the erroneous behavior with

-WS-C2960-48TC-S      running IOS 15.0(2)SE2

-WS-C2960S-48LPS-L  running IOS 15.0(2)SE2

See also discussion:

https://supportforums.cisco.com/thread/2103327

Could anyone provide an advice to which stable IOS release we could downgrade or if this bug will definetly be fixed in any specific future release?

Thanks

Michael

[Pavel Pokorny]

Thank you!!!

I will probably stay with 12.2.55 SE9 for 2960G and 15.0.2SE4 for 2960S.

[rrsstefano]

Hi all,

we decided to test 15.0(2)SE11 ( last available ) in our environment consisting of 2960-24PC-L and 48PST-L ; from the first feedback on 20 devices upgraded ( coming from 12.2(55)SE1 ) we found 2 devices with low mem / mallocc fail problems so devices are not manageable via ssh or telnet...

In our switches are enabled cdp , dhcp snopping , PoE , arp inspection....

Upgrading switch to the 12.2(55)SE12 no problem.....

So we can tell that 15.(0) SE is still not the best solution  for 2960 and perhaps for 3560 platforms

Do you have also similar experience with the last 15.0(2)SE11 ?

Thanks to all for feedbacks !!

[it_sa]

The same problem at WS-C2960-48PST-L with 15.0(2)SE9