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ISL down after cluster switch reboot

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Category:
ontap-9
Specialty:
hw
Last Updated:

Applies to

  • ONTAP 9
  • BES-53248 Cluster Switch

Issue

  • After switch reboot , The system reports ClusterifIslDownWarn_Alert alert in event logs

Thu Aug 03 06:57:42 -0400 [node-03: mgwd: callhome.hm.alert.major:debug]: Call home for Health Monitor process cshm: ClusterIfIslDownWarn_Alert[node03sw01/ Link Aggregate 1].

  • Active system health alert is seen as below

tpanetapp08::> system health alert show
               Node: Node-03
           Alert ID: ClusterIfIslDownWarn_Alert
           Resource:  Link Aggregate 1
           Severity: Major
  Indication Time: Thu Aug 03 07:12:08 2023
           Suppress: false
        Acknowledge: false
     Probable Cause: The cable used to connect switch tpanetapp08sw01/
                     Link Aggregate 1 to the ISL port might be faulty. For
     the port-channel

  • Cluster ISL reports down

0/55      PC Mbr Enable    100G Full             Down   Enable  Enable long
0/56      PC Mbr Enable    100G Full             Down   Enable  Enable long

Log.    Channel                     Admin       Mbr     Device/       Port      Port
Intf    Name            Min  Link   Mode   Type Ports   Timeout       Speed     Active
------- --------------- ---- ------ ------ ---- ------- ------------- --------- -------
1/1     Cluster-ISL     1    Down   En.    Dyn. 0/55    actor/long    100G Full False
                                                        partner/long
                                                0/56    actor/long    100G Full False
                                                        partner/long

  • Bouncing the ISL ports results the ports to be still down

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