Takeover disabled (unsynchronized log) due to HA interconnect Port flapping

• FAS26x0
• FAS27x0
• Internal HA interconnect model system

• Takeover status flapping due to unstable HA interconnect link.

Thu Nov 16 00:35:42 +0100 [ gop_eq_thread: ic.linkStatusChange:info]: HA interconnect: Port ic0a link is down.
Thu Nov 16 00:35:42 +0100 [ ctrl_hb_port_ic0a: ctrl.rdma.heartBeat:info]: HA interconnect: Missed heartbeat to 192.0.1.4.
Thu Nov 16 00:35:44 +0100 [ cf_main: cf.fsm.takeoverOfPartnerDisabled:error]: Failover monitor: takeover of node disabled (HA interconnect error. Verify that the partner node is running and that the HA interconnect cabling is correct, if applicable. For further assistance, contact technical support).
Thu Nov 16 00:35:47 +0100 [ gop_eq_thread: ic.linkStatusChange:info]: HA interconnect: Port ic0a link is up.

• The internal HA interconnect communicates from the ic0a port on the motherboard through the chassis backplane.

Example: 

::> set advanced

Warning: These advanced commands are potentially dangerous; use them only when directed to do so by NetApp personnel.
Do you want to continue? {y|n}: y

::*> system ha interconnect config show

                       Node: fas2750-1a
          Interconnect Type: GOP (PLX PEX8725 NTB)
            Local System ID: 537123457
          Partner System ID: 537123456
       Connection Initiator: partner
                  Interface: backplane

Port   IP Address
----   -----------------
ic0a   192.0.1.4

                       Node: fas2750-1b
          Interconnect Type: GOP (PLX PEX8725 NTB)
            Local System ID: 537123456
          Partner System ID: 537123457
       Connection Initiator: local
                  Interface: backplane

Port   IP Address
----   -----------------
ic0a   192.0.1.5

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