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CLUSTER NETWORK DEGRADED with Total Packet Loss for port-channel D-Disable and down

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fabric-interconnect-and-management-switches
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hw
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Applies to

  • Cluster Network Switch (CNS) NetApp CN1610
  • FastPath running version 1.3.0.2

Issue

  • Multiple "HA Group Notification (CLUSTER NETWORK DEGRADED)" alerts
  • Port channel 3/1 disabled in one switch: 

(Switch-01)#show port all
                              Admin     Physical   Physical   Link   Link    LACP   Actor
      Intf      Type   Mode      Mode       Status     Status Trap    Mode   Timeout
      --------- ------ --------- ---------- ---------- ------ ------- ------ --------
      ...
      0/13      PC Mbr Enable    10G Full   10G Full   Up     Enable  Enable long
      0/14      PC Mbr Enable    10G Full   10G Full   Up     Enable  Enable long
      0/15      PC Mbr Enable    10G Full   10G Full   Up     Enable  Enable long
      0/16      PC Mbr Enable    10G Full   10G Full   Up     Enable  Enable long
      3/1              D-Disable                       Down   Disable N/A    N/A
      3/2              Enable                          Down   Disable N/A    N/A

  • With ports not active:

(Switch-01) #show port-channel all
      Log.    Channel                     Adm.      Mbr    Device/       Port      Port
      Intf    Name            Min  Link   Mode Type Ports  Timeout       Speed     Active
      ------- --------------- ---- ------ ---- ---- ------ ------------- --------- -------
      3/1     ISL-LAG         1    Down   Dis. Stat 0/13   actor/long    10G Full  False
                                                           partner/long
                                                    0/14   actor/long    10G Full  False
                                                           partner/long
                                                    0/15   actor/long    10G Full  False
                                                           partner/long
                                                    0/16   actor/long    10G Full  False
                                                           partner/long

  • But port channel and ISL fine in partner: 

(Switch-02) #show port all
                              Admin     Physical   Physical   Link   Link    LACP   Actor
      Intf      Type   Mode      Mode       Status     Status Trap    Mode   Timeout
      --------- ------ --------- ---------- ---------- ------ ------- ------ --------
      ...
      0/13      PC Mbr Enable    10G Full              Down   Enable  Enable long
      0/14      PC Mbr Enable    10G Full              Down   Enable  Enable long
      0/15      PC Mbr Enable    10G Full              Down   Enable  Enable long
      0/16      PC Mbr Enable    10G Full              Down   Enable  Enable long
      3/1              Enable                          Down   Disable N/A    N/A
      3/2              Enable                          Down   Disable N/A    N/A
(Switch-02) #show port-channel all
      Log.    Channel                     Adm.      Mbr    Device/       Port      Port
      Intf    Name            Min  Link   Mode Type Ports  Timeout       Speed     Active
      ------- --------------- ---- ------ ---- ---- ------ ------------- --------- -------
      3/1     ISL-LAG         1    Up     En.  Stat 0/13   actor/long    10G Full  True
                                                           partner/long
                                                    0/14   actor/long    10G Full  True
                                                           partner/long
                                                    0/15   actor/long    10G Full  True
                                                         partner/long
                                                    0/16   actor/long    10G Full  True
                                                           partner/long

  • Cluster ping-cluster just “fails” with the cluster LIFs “crossing” both switches through the ISL

::> set advanced
::*> cluster ping-cluster -node <node_name>

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