BES クラスタ スイッチの ISL リンクの 1 つがダウン

• ONTAP 9
• BES-53248クラスタスイッチ

• システムはイベント ログに SwitchIslIfDownWarn_Alert アラートを報告します

Mon Aug 25 12:26:21 -0700 [node1: cshmd: hm.alert.raised:alert]: Alert Id = SwitchIslIfDownWarn_Alert , Alerting Resource = switch2/Slot: 0 Port: 56 100G - Level cleared by monitor ethernet-switch

• システムヘルスは以下を報告します 

Detailed Problem Description: Node: Node1
      Alert ID: SwitchIslIfDownWarn_Alert
      Resource: Slot: 0 Port: 56 100G - Level
      Severity: Major
   Indication Time: Thu Jan 15 11:57:07 2026
      Suppress: false
     Acknowledge: false
   Probable Cause: The cable attached to the ISL port "switch1/Slot:
           0 Port: 56 100G - Level" with the description of
           "Cluster ISL Port" might be faulty. For the
           port-channel, please check each individual link.
   Possible Effect: Inter- or Intra- cluster redundancy might be lost.
Corrective Actions: 1) Check whether the cable is fully inserted into the interface port on both ends.
           2) Reconnect the ISL port using another cable. After
           reconnecting it, verify whether the link of the ISL
           port is up by executing the commands per the switch
 configuration guide or by checking whether the Link
           status LED is on. 

• スイッチログはISLリンクがダウンしていることを報告します 

*************** show port all ***************
         Admin    Physical   Physical   Link   Link   LACP   Actor
Intf    Type   Mode    Mode     Status    Status Trap   Mode   Timeout
--------- ------ --------- ---------- ---------- ------ ------- ------ --------

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