Cisco CBS220 switch randomly rebooting - Potential DHCP Issue?
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@giminik My guess is you have some kind of power problem. Maybe an overloaded circuit or overloaded UPS.
I run a Cisco CBS350 switch and it never goes down. I am using a Smart APC UPS. -
@coxhaus is your dhcp or static.. While I am a fan of dhcp reservation vs setting static for sure for most everything - I don't recall ever setting a switch to dhcp ever in real life, ie work.
My switches at home are all static. I don't have any cbs switches, couple of SG300s for me. Some cheap soho netgear and tplink, oh and a sg250 sitting on shelf if I ever need for setup or something.
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Is it over heating have you cleaned the fans? The Cisco Switches and even older Cisco PIX firewalls seem like they run forever, but dust in the fans make them overheat
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I'm with @johnpoz here: I would never have a switch or similar basic network infrastructure device getting its address via DHCP. If you do that, your entire network can go down, or at least become un-manageable, the moment the DHCP server has a hiccup.
Having said that, I suspect the timing of this crash is only coincidental ... unless you have more log entries showing that the pattern repeats?
Flaky power supply could be it, and I also like @JonathanLee's recommendation to open the thing up and clean it.
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I already had this problem before migrating to kea.
Switch is a brand new, no dust, and it provides approximately 15% of the poe budget.It is running for 8 months. I only noticed the problem a few months ago, by chance. We don't always see a 2-minute break over a 40-day period. And when I change a setting, I have to wait that much to see if the problem persists. I switched the IP to static, we'll see in a few weeks.
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@giminik If it's new, I'd RMA it while it's still under warranty. "It randomly reboots" should be plenty enough justification to get it replaced.
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On the cisco forums I saw people having this problem, did an RMA and had the problem again. It seems more like a software problem, moreover in the logs, before the reboot we clearly see the message "REBOOTING" which excludes a power supply problem. Cisco does not communicate about this.
I'm pretty confident about the static IP config. I have to wait about one month to be fixed.
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@giminik it’s the NVRAM some of them are bad
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What's the firmware version in switch?
Firmware 2.0.2.14 Release Notes lists "CBS 220 keeps rebooting after 1 - 2 weeks of uptime." in resolved issues.
https://www.cisco.com/c/dam/en/us/td/docs/switches/lan/csbss/CBS220/Release-Note/b_cbs220-rn-v2_0_2_14.pdf -
@mvikman Damn, I hadn't seen this new version, although I was going to see it regularly. I'm on the version just before this one (2.0.2.12). So I'm going to upgrade. Thank you for enlightening me :)
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@giminik Just out of curiosity, did the switch firmware upgrade solve this or was it something else?
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@mvikman For now, the problem has not manifested itself, but I must wait around forty days to be sure.
