Cisco SG300 switches rebooting itself

[rishabh.sharma]

I am using four SG300 52 ports switches and one SG300 24 port POE switch for around 150 clients. I have been observing the random reboot of all these switches at the same time from last 2 months. Three 52 port switches are up-linked at one 52 port switch which is getting internet from firewall. And POE is also getting internet from the firewall separately. I have checked all the logs but couldn't find anything concrete. After these random reboots, i observed the time settings come to default in all switches. Any views on it? 

[Daniele Giordano]

Double check logs.

What firmware version is installed on the switches? The same?

Can you upgrade the firmware?

Can you configure ACL to management interface to avoid unauthorized access?

Regards.

[rishabh.sharma]

Due to this issue i have already updated the firmware from 1.4.2.4 to 1.4.9.4 on all the switches. But issue is still there.

This is what i found on logs:

2147468264

2018-Dec-06 17:38:06

Emergency

%SYSLOG-F-OSFATAL:   FATAL ERROR: IP6C: ABORT DATA exception  ***** FATAL ERROR *****  SW Version  :  1.4.9.4 Version Date:  04-Jun-2018 Version Time :  00:07:58 Instruction            0x17A554 Exception vector       0x10 Program state register 0x20000013 0x0017a504 0x0019d8e0 0x001a81a0 0x001a8958 0x001a9754 0x001a4204 0x00180104 0x001a7030 0x00188ab0 0x0018cd80 0x0018d7f0 0x00196dd0 0x00186f78 0x00183080 0x001842dc 0x001843c4 0x00184a60 0x00 1223f0 ***** END OF FATAL ERROR *****

[Daniele Giordano]

Hi, seems a fault related to IPv6 (IP6C) that causes a reboot.

Are you using IPv6 in your network? If no, try to disable IPv6 features on the switches and on other devices in your network.

Anyhow my suggestion is to open a case to STAC in order to get an official answer from Cisco with the cause and a possible workaround or a firmware fix.

Regards.

[rishabh.sharma]

Hi Daniele, 

No we are not using IPV6 in our network. I have disabled it on all switches. I will monitor it for sometime and post my observation.

If issue comes again, i will contact Cisco.

Thanks for your help.

[bp7000]

Hi rishabh.sharma,

I am experiencing this same issue. Did disabling IPv6 resolve this for you?

Thanks!

[rishabh.sharma]

Yes, it worked for me. You also have to disable Bonjour forwarding on all the switches along with IPV6 addressing.

[rishabh.sharma]

Yes, it worked for me. You also have to disable Bonjour forwarding on all the switches along with IPV6 addressing.