Takeover impossible and NVRAM log not synchronized in CVO as interconnect was down

Applies to

• Cloud Volumes ONTAP (CVO)
• Microsoft Azure 

Issue

• Cluster Interconnect is down
• e0c port is with no carrier status

Example:

Cluster01::> node run -node * -command ifconfig
        e0c: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
        options=8051b<RXCSUM,TXCSUM,VLAN_MTU,VLAN_HWTAGGING,TSO4,LRO,LINKSTATE>
        ether 00:0d:3a:6c:28:38
        hwaddr 00:0d:3a:6c:28:38
        inet X.X.X.X netmask 0xffffff00 broadcast 10.196.6.255 Services: 0x00000180 Vserver ID: -5
        media: Ethernet autoselect <full-duplex,rxpause,txpause>
        status: no carrier
        
cluster01::> storage failover show -fields interconnect-links ,interconnect-up, interconnect-type
node               interconnect-up interconnect-links        interconnect-type
------------------ --------------- ------------------------- -----------------
cluster01-01         false           RDMA Interconnect is down iWARP
cluster01-02         false           RDMA Interconnect is down iWARP
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