0 Replies Latest reply on Oct 5, 2018 12:25 PM by taylors

    Losing switches from ARP table in 3140

    taylors New Member

      I am using this 3140 as a router, with 3 1550 switches connected. 1 of the 1550 switches is Up linked to Customer Network, and am passing Customer Network Traffic from PC through Phone, to my switch, then back to their switch. There is no known IP conflict on either network, yet at different points I am losing access to my switches in VLAN 1. Customer Traffic is all coming in on VLAN 17, which is experiencing higher than other VLAN broadcasts, and unknown protocols. Everything connected to VLAN 17, and the Phone traffic on VLAN 10, is functioning as it should, including Retaining entries in the ARP list for all devices in VLAN 10. However, I am losing access to different switches in VLAN. Their addresses periodically disappear from the ARP list, and do not reappear until the affected switches are rebooted. I am seeing high CPU load on these switches, but not so high as to be concerning.

       

      Customer Network is not in a state that can be changed.

       

      Here is some output from the stack.

       

      nv3140#show proc stack

      Id         Task                    Usage

      0          Idle                     0/0

      1          init                  1056/0

      2          kthreadd                 0/0

      3          ksoftirqd/0              0/0

      4          kworker/0:0              0/0

      5          kworker/u:0              0/0

      6          rcu_kthread              0/0

      7          khelper                  0/0

      8          kworker/u:1              0/0

      85         sync_supers              0/0

      87         bdi-default              0/0

      89         kblockd                  0/0

      184        rpciod                   0/0

      185        kworker/0:1              0/0

      209        khungtaskd               0/0

      214        kswapd0                  0/0

      278        fsnotify_mark            0/0

      284        nfsiod                   0/0

      292        crypto                   0/0

      375        mtdblock0                0/0

      380        mtdblock1                0/0

      385        mtdblock2                0/0

      390        mtdblock3                0/0

      395        mtdblock4                0/0

      400        mtdblock5                0/0

      405        mtdblock6                0/0

      410        mtdblock7                0/0

      432        edac-poller              0/0

      439        rcS                   2336/0

      470        ubi_bgt0d                0/0

      479        ubi_bgt1d                0/0

      486        ubifs_bgt0_0             0/0

      488        ubifs_bgt1_0             0/0

      605        runstarter            6448/0

      611        syslogd                896/0

      617        amom                  1216/0

      618        AIPC Session Th      1997147728/0

      619        AMOM network th      1988759120/0

      635        khubd                    0/0

      700        starter               1696/0

      702        Init                   992/0

      704        InterruptThread      2006760816/0

      705        KCall                2006629904/0

      706        PC Config            2006388208/0

      707        PacketRouting        1971645936/0

      708        Timers               1971515088/0

      709        I2C                  1971383792/0

      710        CallControlQue~      1971211760/0

      711        Thread Pool          1970949664/0

      712        FrontPanel           1970806256/0

      713        RSTP                 1968500208/0

      714        sec                  1968369136/0

      715        con0                 1967451584/0

      716        gigTSEC              1967320560/0

      717        ICP Session          1967066608/0

      718        RSTP                 1966751216/0

      719        RSTP-BG              1966616048/0

      720        MLD Thread           1966386672/0

      721        RouteTableTick       1966226928/0

      722        RouteTableTick       1966050800/0

      723        IGMPTick             1965919696/0

      724        IGMP-Receiver        1965788720/0

      725        IP Events            1965649392/0

      726        tcptimer             1965506048/0

      727        tcpinp               1965371024/0

      728        tcpout               1965239904/0

      729        DnsClient            1964978160/0

      730        DnsProxy             1964847120/0

      731        DnsTable             1964715504/0

      732        PhoneManagerQu~      1964572144/0

      733        SnmpThread           1964351552/0

      734        WWW                  1964220864/0

      735        MediaConnectio~      1962843632/0

      736        FTPServer List~      1962307600/0

      737        SMTP Client          1962155504/0

      738        SNTP Client          1962024736/0

      739        CPU Usage            1961889840/0

      740        CLIInjectQ           1961668080/0

      742        OSPF                 1961389552/0

      744        RipOut               1961168320/0

      745        RipIn                1961038176/0

      746        UDP Relay            1959573136/0

      747        DHCP Server          1959433616/0

      748        TFTP                 1957683616/0

      749        SIP_Stack            1838355040/0

      750        TFTPThreadPool       1838222880/0

      751        TFTPThreadPool       1838091808/0

      752        TFTPThreadPool       1837960736/0

      753        TFTPThreadPool       1837829664/0

      754        TFTPThreadPool       1837698592/0

      755        SIPProxyQueue        1837551088/0

      756        ntpd                 1835966256/0

      757        ActiveQueueDea~      1835822528/0

      758        AUTOLINKQ            1835687408/0

      759        HttpClientQ          1835552240/0

      760        DHCPv6               1835393184/0

      761        RvSipProc0           1835056752/0

      762        UDP In               1961528816/0

      763        PacketCapture        1814597104/0

      764        Flow Meter Log~      1814429168/0

      765        OSPFv3               1814298096/0

      766        TWAMP-Control        1814163248/0

      767        TWAMP-Test           1814032176/0

      1911       flush-ubifs_1_0          0/0

       

      ##################################

       

      Attached are the Router Config, and the output of CPU processes