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Cluster switch repeats link up and down

Applies to

  • FAS8200
  • CN1610
  • ONTAP 9

Issue

  • CN1610 cluster switch repeats link up and down.
  • EMS log reports the following information.

Example:

Wed Mar 25 12:06:18 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0b: Link down, check cable.
Wed Mar 25 12:06:18 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0a: Link down, check cable.
Wed Mar 25 15:56:12 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0b: Link down, check cable.
Wed Mar 25 15:56:12 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0a: Link down, check cable.
...
...
Sun Mar 29 13:36:20 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0b: Link down, check cable.
Sun Mar 29 13:36:20 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0a: Link down, check cable.
...
...
Mon Mar 30 19:02:47 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0b: Link down, check cable.
Mon Mar 30 19:02:47 JST [cluster01: kernel: netif.linkDown:info]: Ethernet e0a: Link down, check cable

  • show-tech-support shows the following information on the cluster switch.

Example:

[2020-03-23 10:21:38.855]   0 Mar 23 07:23:27 2020     Link Up: 0/2
[2020-03-23 10:21:38.855]   1 Mar 23 07:23:26 2020     Link Down: 0/2
[2020-03-23 10:21:38.855]   2 Mar 21 23:36:37 2020     Link Up: 0/2
[2020-03-23 10:21:38.855]   3 Mar 21 23:36:36 2020     Link Down: 0/2
[2020-03-23 10:21:38.855]   4 Mar 21 22:50:45 2020     Link Up: 0/2
[2020-03-23 10:21:38.855]   5 Mar 21 22:50:44 2020     Link Down: 0/2
[2020-03-23 10:21:38.855]   6 Mar 19 22:49:47 2020     Link Up: 0/2
[2020-03-23 10:21:38.855]   7 Mar 19 22:49:46 2020     Link Down: 0/2
[2020-03-23 10:21:38.855]   8 Mar 13 08:53:30 2020     Link Up: 0/2
[2020-03-23 10:21:38.855]   9 Mar 13 08:53:30 2020     Link Down: 0/2
[2020-03-23 10:21:38.855]  10 Mar 13 08:26:28 2020     Link Up: 0/2
[2020-03-23 10:21:38.855]  11 Mar 13 08:26:27 2020     Link Down: 0/2
[2020-03-23 10:21:38.871]  12 Mar  9 06:07:50 2020     Link Up: 0/2
[2020-03-23 10:21:38.871]  13 Mar  9 06:07:50 2020     Link Down: 0/2
...
[2020-03-23 10:21:38.933] 102 Jul 16 13:38:14 2019     Link Down: 0/2
[2020-03-23 10:21:38.933] 103 Jul 16 13:38:14 2019     Link Down: 0/1
[2020-03-23 10:21:38.933] 104 Jul 16 13:38:12 2019     Link Up: 0/2
[2020-03-23 10:21:38.933] 105 Jul 16 13:38:12 2019     Link Up: 0/1
[2020-03-23 10:21:38.933] 106 Jul 16 13:38:11 2019     Link Down: 0/2
[2020-03-23 10:21:38.933] 107 Jul 16 13:38:11 2019     Link Down: 0/1
[2020-03-23 10:21:38.933] 108 Jul 16 13:38:08 2019     Link Up: 0/2
[2020-03-23 10:21:38.933] 109 Jul 16 13:38:08 2019     Link Up: 0/1

 

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