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ONTAP iSCSI SAN unreliable ports with 10GB SFP MM SR

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san
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Applies to

  • ONTAP iSCSI SAN
  • SnapMirror Active sync (SM-as)
  • Cisco
  • VMware

Issue

  • New setup Testing iSCSI paths fail or unreliable
  • Ports on all 4 nodes equipped with 10GB SFP+ MM SR ( Short Reach ) modules are unreliable
  • Unreliable connections with Long reach ( LR ) infrastructure, structured cabling / patch panels
  • Logical interface ( LIF) B on port B  ifstat indicates a high level of Total errors at VLAN or L2
  • SM-as out of sync errors
 
Example:
10GB SFP+ MM SR  - multi-mode  short reach
10GB SFP+ LR SM -  Long reach single mode
 
slot 2: Quad 10G/25G Ethernet Controller CX5-Mezz
                                e2a MAC Address:     (auto-10g_sr-fd-up)
 
slot 2: Quad 10G/25G Ethernet Controller CX5-Mezz
                                e2b MAC Address:     (auto-10g_lr-fd-up)
 

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