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    Cisco CBS220 switch randomly rebooting - Potential DHCP Issue?

    Scheduled Pinned Locked Moved DHCP and DNS
    16 Posts 6 Posters 882 Views
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    • johnpozJ
      johnpoz LAYER 8 Global Moderator @giminik
      last edited by johnpoz

      @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..

      An intelligent man is sometimes forced to be drunk to spend time with his fools
      If you get confused: Listen to the Music Play
      Please don't Chat/PM me for help, unless mod related
      SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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      • G
        giminik
        last edited by

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

          @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
          

          An intelligent man is sometimes forced to be drunk to spend time with his fools
          If you get confused: Listen to the Music Play
          Please don't Chat/PM me for help, unless mod related
          SG-4860 24.11 | Lab VMs 2.7.2, 24.11

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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
              If you get confused: Listen to the Music Play
              Please don't Chat/PM me for help, unless mod related
              SG-4860 24.11 | Lab VMs 2.7.2, 24.11

              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

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                • 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.

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                  • 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.

                      G 1 Reply Last reply Reply Quote 0
                      • 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

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                          • 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)
                            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 1
                            • 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.

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