One link in LACP bond comes up as 'churned' and does not send any LACPDUs

Solution In Progress - Updated -

Issue

  • At reboot one NIC in an LACP/mode 4 bond does not come up as expected. In the output of /proc/net/bond/bond0 one interface is listed as 'churned' and the 'system MAC address' of one link is 00:00:00:00:00:00.
Slave Interface: ens3
MII Status: up
Speed: 10000 Mbps
Duplex: full
Link Failure Count: 0
Permanent HW addr: 00:00:00:00:00:cc
Slave queue ID: 0
Aggregator ID: 1
Actor Churn State: churned
Partner Churn State: churned
Actor Churned Count: 1
Partner Churned Count: 1
details actor lacp pdu:
    system priority: 65535
    system mac address: 00:00:00:00:00:cc
    port key: 0
    port priority: 255
    port number: 1
    port state: 69
details partner lacp pdu:
    system priority: 65535
    system mac address: 00:00:00:00:00:00
    oper key: 1
    port priority: 255
    port number: 1
    port state: 1

Environment

  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 7
  • bonding kernel module

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