MetroCluster HA interconnect port e1a down

• FAS8300
• ONTAP 9
• MetroCluster IP
• HA interconnect ports using 100 GbE QSFP28 optics

• EMS reports repeated HA interconnect down events

node-02 ERROR ic.HAInterconnectDown: HA interconnect: Interconnect down for 606 minutes: link0 down
node-02 ERROR ic.HAInterconnectDown: HA interconnect: Interconnect down for 546 minutes: link0 down

• Call Home alerts generated for HA interconnect port offline

node-02 ALERT callhome.hainterconnect.down: Call home for HA INTERCONNECT DOWN due to link0 down.
node-02 ALERT callhome.hm.alert.major: Call home for Health Monitor process nchm: MccIp_PortOfflineAlert[nodre-02_e1a-10].

• One node shows HA interconnect link down while partner remains up

cluster::*> system ha interconnect status show
 
   Node: node-01
  Link 0 Status: up
  Link 1 Status: up
   Is Link 0 Active: true
   Is Link 1 Active: true
 IC RDMA Connection: up
 
   Node: node-02
  Link 0 Status: down
  Link 1 Status: up
   Is Link 0 Active: false
   Is Link 1 Active: true
 IC RDMA Connection: up

• QSFP module not detected on affected port

sysconfig -a
  slot 1: Dual 40/100G Ethernet T62100-CR
   e1a MAC Address:  00:07:43:xx:xx:xx (auto-unknown-fd-down)
   QSFP Vendor: 
   QSFP Part Number:  
   QSFP Serial Number: