Cisco CBS220 switch randomly rebooting - Potential DHCP Issue?
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@giminik well putting the devices on different upses not really a check if the devices power supply has issues.Did you like switch it to a full sinewave ups vs simulated? But again that could have zero to do with anything if the power supply is just flaky..
But per your thread would be simple enough to test if dhcp is the problem, per the thread they disabled the IPv6 stack on the switch as well.. I would do what they did disable the ipv6 on the switches management IP and set the IPv4 to static..
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I just turn this setting after my first post. So I have to wait a long time to know.
But are these logs normal?
Jul 5 19:10:41 dhcpleases 38813 Sending HUP signal to dns daemon(85903) Jul 5 19:10:41 dhcpleases 38813 Could not deliver signal HUP to process 85903: No such process. Jul 5 19:10:42 kea-dhcp4 13245 INFO [kea-dhcp4.dhcp4.0xfbfa9412000] DHCP4_SHUTDOWN server shutdown -
@giminik have no idea what the normal logs for kea look like to be honest, its preview - it is missing many features currently.. no registration, no options, etc.. See the release notes or the blog.
Unless all your doing is the most basic of handing out an ip, would suggest you switch back to isc..
https://www.netgate.com/blog/netgate-adds-kea-dhcp-to-pfsense-plus-software-version-23.09-1
Basic functionality is present in version 23.09, but the Kea implementation lacks the following DHCP server features: Local DNS Resolver/Forwarder Registration for static and dynamic DHCP clients Remote DNS server registration DHCPv6 Prefix Delegation High Availability Failover Lease statistics/graphs Custom DHCP options -
@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.
