クラスタポートでは CRC エラーが多数発生します

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環境

FAS2750
FAS2720
AFF C190A
ONTAP 9
スイッチレスクラスタ

問題

CRCエラー数は、クラスタポートでを複数回使用した場合にカウントされます ifconfig:

-- interface e0b (232 days, 2 hours, 21 minutes, 3 seconds) --

EMSエラーメッセージで次の出力が1時間ごとに連続して表示される：

Tue Dec 01 04:04:26 JST [node 2: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. Tue Dec 01 05:04:27 JST [node 2: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. Tue Dec 01 06:04:27 JST [node 2: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. Tue Dec 01 07:04:27 JST [node 2: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. Tue Dec 01 08:04:28 JST [node 2: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. Tue Dec 01 09:04:29 JST [node 2: intr: netif.linkErrors:error]: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch.

HAパートナーコントローラe0bポート間のケーブルを分離ポートとして交換したあとも、上記のエラーメッセージが停止しません。

::> event log show Time Node Severity Event ------------------- ---------------- ------------- --------------------------- 1/5/2021 15:11:21 node 2 ERROR netif.linkErrors: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicat e a duplex mismatch. 1/5/2021 14:54:52 node 1 EMERGENCY vifmgr.clus.linkdown: The cluster port e0b on node node 1 has gone down unexpectedly. 1/5/2021 14:54:52 node 2 EMERGENCY vifmgr.clus.linkdown: The cluster port e0b on node node 2 has gone down unexpectedly. 1/5/2021 14:11:20 node 2 ERROR netif.linkErrors: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. 1/5/2021 13:11:20 node 2 ERROR netif.linkErrors: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. 1/5/2021 12:11:19 node 2 ERROR netif.linkErrors: Excessive link errors on network interface e0b. Might indicate a bad cable, switch port, or NIC, or that a cable connector is not fully inserted in a socket. On a 10/100 port, might indicate a duplex mismatch. Press <space> to page down, <return> for next line, or 'q' to quit... q 6 entries were displayed.

これはスイッチレスクラスタ構成のターゲットe0bポートで、ノード1 e0bとノード2 e0bをクラスタLIFポートとして直接接続します。
ケーブル交換後もCRCエラー数は増え続け、エラーが報告され続けます
速度とデュプレックスを接続する各ノード間でポートに違いはなく、SFPなどのトランシーバは使用されません。
クロスコネクトの場合、ポートにエラーが発生しているため、ケーブルに従わないでください。