unstable iOS on 3750's

Catalyst WS-C3750X-12S-S is next-generation energy-efficient Layer 3 Fast Ethernet stackable switches while 3750X is layer 3 GE switches. The Cisco Catalyst 3750 v2 Series consumes less power than its predecessors 3750. The 3750-X Series Switches are enterprise-class lines of stackable and standalone switches with StackWise Plus technology, they are the replacement of Cisco 3750G and 3750E switches. 3Anetworkcom keeps many stocks for 3750V2 and 3750X switches. Among all Cisco Catalyst 3750 switches, WS-C3750V2-24TS-S and WS-C3750X-24T-S are best selling models. 3Anetwork.com offers best Cisco 3750 Price, Cisco 3750V2 Price, Cisco 3750X Price, ship to worldwide.

We've had issues with our 9 switch 3750 stack crashing on 12.2(58)SE2 so tac said to upgrade to 15.0(2)SE4. We did that upgrade today and while at first it seemed to take, the stack eventually froze and after a few reboots we just couldn't log in via ssh or console. Console would complain about memory.

So we eventually broke the stack and one by one downgraded to 12.2(55)SE8. Was a painful process as the last 3 switches are 3750X POE so they had to do the microcode update again. We also took out a 3750v2 48 port since we consolidated some things.

So now all seems working with 3 3750X PoE and 5 3750v2 on 12.2(55)SE8. downgrading to that version of IOS?

One of the best releases of IOS started from 12.2(55)SE6 to SE8.  I strongly recommend 12.2(55)SE8 as it's very stable.  All my 3750/G/E/X are running this version without any issues or even crashes.

15.0(2)SE4 is also not bad.  The rest are plain rubbish.

For more Cisco WS-C3750V2-48PS-S information please click here