I am building Gaudi2 GPU server with Cisco Nexus 9000 switches. N9K-C9364D-GX2A
Our qualification test requires port flap.
When I shutdown a switch port or Gaudi port, adjacent port is flapping.
I shut down enp77s0d22 port on Gaudi2, adjacent ports, enp77s0d23, enp78s0d23, enp51s0d23, enp52s0d23 are going down after 4 sec and keep flapping over 10 min.
ciscouser@gaudi-2-17:~$ sudo ifconfig enp77s0d22 down
ciscouser@gaudi-2-17:~$ sudo cat /var/log/syslog
Nov 25 20:51:47 gaudi-2-17 kernel: [993970.165603] habanalabs 0000:4d:00.0 enp77s0d22: port was closed
Nov 25 20:51:47 gaudi-2-17 systemd-networkd[2524]: enp77s0d22: Link DOWN
Nov 25 20:51:47 gaudi-2-17 systemd-networkd[2524]: enp77s0d22: Lost carrier
Nov 25 20:51:48 gaudi-2-17 kernel: [993970.564085] habanalabs 0000:4e:00.0 enp78s0d22: link down, port 22
Nov 25 20:51:48 gaudi-2-17 kernel: [993970.567763] habanalabs 0000:33:00.0 enp51s0d22: link down, port 22
Nov 25 20:51:48 gaudi-2-17 kernel: [993970.570084] habanalabs 0000:34:00.0 enp52s0d22: link down, port 22
Nov 25 20:51:48 gaudi-2-17 systemd-networkd[2524]: enp78s0d22: Lost carrier
Nov 25 20:51:48 gaudi-2-17 systemd-networkd[2524]: enp51s0d22: Lost carrier
Nov 25 20:51:48 gaudi-2-17 systemd-networkd[2524]: enp52s0d22: Lost carrier
Nov 25 20:51:52 gaudi-2-17 systemd-networkd[2524]: enp51s0d23: Lost carrier
Nov 25 20:51:52 gaudi-2-17 systemd-networkd[2524]: enp52s0d23: Lost carrier
Nov 25 20:51:52 gaudi-2-17 systemd-networkd[2524]: enp52s0d23: Gained carrier
Nov 25 20:51:52 gaudi-2-17 systemd-networkd[2524]: enp51s0d23: Gained carrier
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.097544] habanalabs 0000:33:00.0 enp51s0d23: link down, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.097628] habanalabs 0000:34:00.0 enp52s0d23: link down, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.099416] habanalabs 0000:34:00.0 enp52s0d23: link up, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.099454] habanalabs 0000:33:00.0 enp51s0d23: link up, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.294416] habanalabs 0000:33:00.0 enp51s0d23: link down, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.329076] habanalabs 0000:4d:00.0 enp77s0d23: link down, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.332900] habanalabs 0000:4e:00.0 enp78s0d23: link down, port 23
Nov 25 20:51:52 gaudi-2-17 kernel: [993975.338943] habanalabs 0000:34:00.0 enp52s0d23: link down, port 23
Nov 25 20:51:53 gaudi-2-17 systemd-networkd[2524]: enp51s0d23: Lost carrier
Nov 25 20:51:53 gaudi-2-17 systemd-networkd[2524]: enp77s0d23: Lost carrier
Nov 25 20:51:53 gaudi-2-17 systemd-networkd[2524]: enp78s0d23: Lost carrier
Nov 25 20:51:53 gaudi-2-17 systemd-networkd[2524]: enp52s0d23: Lost carrier
What else I can check to find why PORT 23 is flapping when port22 is shutdown?