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    Cisco CBS220 switch randomly rebooting - Potential DHCP Issue?

    Scheduled Pinned Locked Moved DHCP and DNS
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    • C
      coxhaus @giminik
      last edited by

      @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.

      johnpozJ 1 Reply Last reply Reply Quote 0
      • johnpozJ
        johnpoz LAYER 8 Global Moderator @coxhaus
        last edited by

        @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.

        An intelligent man is sometimes forced to be drunk to spend time with his fools
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        T 1 Reply Last reply Reply Quote 0
        • JonathanLeeJ
          JonathanLee
          last edited by

          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

          Make sure to upvote

          1 Reply Last reply Reply Quote 1
          • T
            tgl @johnpoz
            last edited by

            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.

            1 Reply Last reply Reply Quote 0
            • G
              giminik
              last edited by

              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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              • T
                tgl @giminik
                last edited by

                @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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                • G
                  giminik @tgl
                  last edited by

                  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.

                  JonathanLeeJ 1 Reply Last reply Reply Quote 0
                  • JonathanLeeJ
                    JonathanLee @giminik
                    last edited by

                    @giminik it’s the NVRAM some of them are bad

                    Make sure to upvote

                    1 Reply Last reply Reply Quote 0
                    • M
                      mvikman
                      last edited by

                      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

                      pfSense Plus 24.11-RELEASE (amd64)
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                      • G
                        giminik @mvikman
                        last edited by

                        @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 :)

                        M 1 Reply Last reply Reply Quote 0
                        • M
                          mvikman @giminik
                          last edited by

                          @giminik Just out of curiosity, did the switch firmware upgrade solve this or was it something else?

                          pfSense Plus 24.11-RELEASE (amd64)
                          Dell Optiplex 7040 SFF
                          Core i5-6500, 8GB RAM, 2x 240GB SSD (ZFS Mirror)
                          HPE 561T (X540-AT2), 2-port 10Gb RJ45
                          HPE 562SFP+ (X710-DA2), 2-port 10Gb SFP+

                          G 1 Reply Last reply Reply Quote 0
                          • G
                            giminik @mvikman
                            last edited by

                            @mvikman For now, the problem has not manifested itself, but I must wait around forty days to be sure.

                            1 Reply Last reply Reply Quote 0
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