August 7, 2015 Darren

Cisco ESW-520-24P Rebooting

If you have a Cisco Small Business Pro Switch (ESW-520-24P) and see errors/network disconnections like the below:

2147447757 07-Aug-2015 10:31:14 Emergency %SYSLOG-F-OSFATAL: FATAL ERROR: BNJR: SYSTEM RESET exception ***** FATAL ERROR ***** SW Version : 2.1.19 Version Date: 13-Jul-2010 Version Tim e: 11:42:02 Instruction 0x0 Exception vector 0x0 Program state register 0x60000013 0xfffcdde8 ***** END OF FATAL ERROR *****
2147449522 14-Jul-2010 04:22:24 Emergency %SYSLOG-F-OSFATAL: FATAL ERROR: BNJR: ABORT PREFETCH exception ***** FATAL ERROR ***** SW Version : 2.1.19 Version Date: 13-Jul-2010 Version T ime: 11:42:02 Instruction 0x30013000 Exception vector 0xC Program state register 0x60000033 FATAL ERROR: BNJR: ABORT DATA exception SW Version : 2.1.19 Version Date: 13-Jul-2010 Version Time: 11:42:02 Instruction 0x183D04 Exception vector 0x10 Program state r egister 0x80000093 0x00183bd4 0x00184110 0x00116a28 0x00116c08 0x00122814 ***** END OF FATAL ERROR *****
2147451286 13-Jul-2010 11:53:11 Emergency %SYSLOG-F-OSFATAL: FATAL ERROR: BNJR: ABORT PREFETCH exception ***** FATAL ERROR ***** SW Version : 2.1.19 Version Date: 13-Jul-2010 Version T ime: 11:42:02 Instruction 0xA343736 Exception vector 0xC Program state register 0x60000033 FATAL ERROR: BNJR: ABORT DATA exception SW Version : 2.1.19 Version Date: 13-Jul-2010 Version Time: 11:42:02 Instruction 0x183D04 Exception vector 0x10 Program state re gister 0x80000093 0x00183bd4 0x00184110 0x00116a28 0x00116c08 0x00122814 ***** END OF FATAL ERROR *****
2147453050 13-Jul-2010 12:52:48 Emergency %SYSLOG-F-OSFATAL: FATAL ERROR: BNJR: ABORT PREFETCH exception ***** FATAL ERROR ***** SW Version : 2.1.19 Version Date: 13-Jul-2010 Version T ime: 11:42:02 Instruction 0xA343736 Exception vector 0xC Program state register 0x60000033 FATAL ERROR: BNJR: ABORT DATA exception SW Version : 2.1.19 Version Date: 13-Jul-2010 Version Time: 11:42:02 Instruction 0x183D04 Exception vector 0x10 Program state re gister 0x80000093 0x00183bd4 0x00184110 0x00116a28 0x00116c08 0x00122814 ***** END OF FATAL ERROR *****

Try Turning Bonjour off.

We saw this issue today where the Bonjour service was overloading the switch causing random disconnections throughout the day.