2960X-48TS-L hangs at Testing Memory

[Oliver.Gao36]

Hi all,
I was facing an issue after 2960X switch upgrading IOS to a higher version, after rebooting.
my switch always hangs at

CPU rev: B
Image passed digital signature verification
Board rev: 5
Testing DataBus...
Testing AddressBus...
Testing Memory from 0x00000000 to 0x1fffffff...| S

can someone help to give me solution?

[Leo Laohoo]

Try performing a hard reboot (pull the power cable).
If things don't improve, contact TAC and organize for an RMA.

[Oliver.Gao36]

i tried. but looks that this cannot solve the issue. seems i will have to open a TAC support.

[balaji.bandi]

what was the version it was running before..looks like you hitting with Memory Bug, time for RMA.

[Oliver.Gao36]

previous running IOS version was 15.2.5E, running under bundled mode.

i just downloaded 15.2.7 via TFTP, and set boot system with this version, then performed reloading.

after that, the switch always hangs at testing memory, so unlucky....

[balaji.bandi]

Another bad day..time for RMA if you have contract.

[saloaun18]

hi mate, did u resolve this issue? i have the same problem

[balaji.bandi]

Raise TAC case and RMA

[ckelly]

Same here with 15.2.7E1, new release.  Bricked two so far, not loading another.  These are new out of box, updating to latest release per Cisco.  Going back to 15.2-7.E0a

[Leo Laohoo]

Console into the switch and reboot.
Post the entire boot-up process (with the new firmware) so we can see what the switch is doing.

[ckelly]

Whats to post - it hangs at the 5th line displayed Testing Memory....  There is no "boot process".  It also won't respond to attempts to boot into ROMON.

Of the 7 NIB 2960X-48TD-L received yesterday - one failed on update, two others are BOOT FAIL out of the box and those also won't respond to any attempt to access ROMON.  DOA.  

I will add that I'm loading 15.2.7.E0a on these and after the update they are coming up BOOT FAIL.  However, after a power cycle, they are booting normally on the new IOS.  The ones that work, anyway.  

[ckelly]

In response to the boot query

CPU rev: B
Image passed digital signature verification
Board rev: 5
Testing DataBus...
Testing AddressBus...
Testing Memory from 0x00000000 to 0x1fffffff.../ <---done here

[balaji.bandi]

just to understand is this new device ? or upgraded IOS ?

[Leo Laohoo]

Stupid question: Have you tried pulling the power (and not the "reload" command)?

[ckelly]

These are "new" from our vendor.  Looking, most have build dates of late 2018.  So maybe not new production but new in sealed boxes from Cisco.  Came loaded with 15.2.2 something.

I only pull the power cord.  None of this is with "reload".  Even after a successful update, I pull power on a switch and make sure it comes up from cold.  If I build a stack with it, I'll do the entire stack at least twice from cold before saying "ready to deploy."