ネットワークの問題によりMEDIATOR DOWN AUSO DISABLED

• MetroCluster IP
• ONTAP 9
• ONTAP Mediator

• 定期的なAutoSupportがトリガーされ、タイトルは MEDIATOR DOWN, AUSO DISABLED
• ONTAPイベントログにはMediatorメールボックスディスクへの接続が失われたことが表示されます：

[mlm.array.lun.removed:notice]: Array LUN '0f.0' (343111111534) is no longer being presented to this node
[mlm.TPQD.TPutilization:error]: Array target port of 53059d50444f5476 has had its dynamic target port queue depth lowered to 8 which is 25%% or lower of its maximum allowed value of 512.
fmmbx_diskOpsManager: fmmb_disk_io_replyFailed_1:debug]: params: {'disk_name': '0f.2', 'uuid': '36313030:35313061:00000000:00000000:00000000:00000000:00000000:00000000:00000000:00000000', 'status': 'no valid path to disk', 'operation': 'MBX_DISKIO_WRITE_SPECIFIED_BLOCK', 'side': 'Local', 'handle': '0x0', 'flag': '0x14', 'io_state': '1'}
[cf.mccip.med.auso.stDisabled:error]: Automatic switchover disabled: Mediator mailbox disk not healthy.
callhome.mccip.auso.disabled:alert]: Callhome for MEDIATOR DOWN, AUSO DISABLED.

• scst.log Mediatorホストでネットワークタイムアウトと切断を表示

kernel:[0]: iscsi-scst: ***ERROR***: Timeout 30 sec sending data/waiting for reply to/from initiator iqn.1994-09.org.freebsd:xxxxxxxx-xxxx-xxxx-xxxx-xxxxead3bc0e (SID xxxxxxxxcc9680), closing connection 000000005d51b459

kernel:[0]: iscsi-scst: ***ERROR***: Connection 00000000fb05056b with initiator iqn.1994-09.org.freebsd:xxxxxxxxx-xxxx-xxxx-xxxx-xxxxead3c1bb unexpectedly closed!

• Mediator接続ステータスがfailedと表示される 

cluster::> metrocluster configuration-settings mediator show
Mediator IP    Port   Node           Configuration Connection
                         Status     Status
--------------- ------- ----------------------- ------------- -----------
10.97.xx.xx
         31784   node1           true      false
             node2           true      false