sg500-52 infinite reboot after upgrade

[brendan_kearney]

i attempted to update my switch to the newer boot code and firmware version, but the device is now in an infinite reboot loop, is unresponsive to the serial console connection, and will not reset to factory image when i press and hold the reset button.

how can i get my switch back?

[Aleksandra Dargiel · Accepted solution]

Hi Brendan,

without any access to the switch there is not much you can do. Please ensure that when testing switch is not connected to the network in case the cause of the problem is related to the network traffic.

You should be able to get console connection if:

1. speed is set to 115200

2. using the serial cable which was in the package

Regards,

Alkesandra

[brendan_kearney]

the included serial cable was the answer.

i know IOS class devices use rollover cables.  what is specific to the serial cable inlcuded with these devices?  i want at least one more of them, and will have to label the one i have...

[brendan_kearney]

seems i am not out of the woods just yet...

-- Unit Number 1                  --
------------------------------------

12-Jan-2014 18:08:17 %Entity-I-SEND-ENT-CONF-CHANGE-TRAP: entity configuration change trap.
12-Jan-2014 18:08:23 %MNG_DIAG-E-DIAGATINIT: Init: VLAN 0: VLAN is currently used for internal usage.
12-Jan-2014 18:08:23 %BRG_INIT-E-INITERR: BRMNG_init2: Errors occurred during initialization
12-Jan-2014 18:08:23 %INIT-E-ApplErr: BRDGG_init2: Errors occurred during initialization
12-Jan-2014 18:08:28 %LINK-F-l2_MI_ifEntry_is_null: NETP_l2_Get_ifTable failed to get MI ifEntry

***** FATAL ERROR *****
Reporting Task: ROOT.
Software Version: 1.3.7.18 (date  12-Jan-2014 time  18:04:29)

***** DEBUG *****
DEBUG LOG IS EMPTY
0x16b9f8
0x167b64
0x762c24
0x4e9270
0x4e9b80
0x4e9da0
0x80cddc
0x480e18
0x4aedbc
0x4b3858
0x71e6e8
0x72ab58
0x70b858
0x70b8b0
0x1f16cc
0x1223fc

**************************************************
*****************  SYSTEM RESET  *****************
**************************************************

[Aleksandra Dargiel]

Hi Brendan,

For the cable it is RSR232 (DB9-DB9) null modem (not straight through).

for the fatal error you may try to access boot menu and perform firmware upload. But maybe it would be better idea to open support ticket with Small Business team:

http://www.cisco.com/c/en/us/support/web/tsd-cisco-small-business-support-center-contacts.html

Regards,

Aleksandra