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CONTAP-63314: Two-node switchless AFF A400 clusters might experience remote data access issues when cross-cabled

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Issue

  • We see the following EMS message in logs. If the message repeats every few minutes, it might indicate a problem in the cluster interface configuration or the physical cabling of the switchless cluster.
  • If two-node switchless AFF A400 cluster ports are cross-cabled, remote data access might have intermittent issues due to session establishment failures.
  • Additional issues on the cluster might arise due to the cross-cabled ports, and thus identifying and resolving the cross-cabled ports is the first step prior to resolving any other issues on your cluster.
    cluster01-01: kernel: csm.homePortInfoUnexpected:notice]: CSM reports unexpected information for cluster LIF ID "1023" (home port: "e3b", remote device ID: "e3a").
  • Intermittent Idle Timeout alerts for NFS mounts on the servers.
    cluster02-02 ERROR Nblade.nfsConnResetAndClose: Shutting down connection with the client. Vserver ID is 4; network data protocol is NFS, Rpc Xid 0x0; client IP address:port is 10.120.10.19:25368. local IP address is 10.120.10.18; reason is Idle Timeout, closing connection.

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