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Flapping network port is observed on a switchless cluster system

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Applies to

Issue

  • A constantly flapping link brings a network port down on the cluster network:
[Node-01: kernel: netif.linkDown:info]: Ethernet e0c: Link down, check cable.
[Node-01: vifmgr: vifmgr.portdown:notice]: A link down event was received on node Node-01, port e0c.
[Node-01: vifmgr: vifmgr.clus.linkdown:EMERGENCY]: The cluster port e0c on node Node-01 has gone down unexpectedly.
[Node-01: vifmgr: vifmgr.portup:notice]: A link up event was received on node Node-01, port e0c.
[Node-01: vifmgr: vifmgr.port.monitor.failed:error]: The "link_flapping" health check for port e0c (node Node-01) has failed. The port is operating in a degraded state.
[Node-01: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: Frequent Link Flapping - Cluster port e0c on node Node-01 has experienced multiple link down notifications.
  • Multiple messages for LIFs being moved due to a port degradation. 

[Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus2 (on virtual server 1234567890), IP address 169.254.202.133, is being moved to node Node-01, port e0d from node Node-01, port e0c because the port's health status is in a degraded state.
[Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus2 (on virtual server 1234567890), IP address 169.254.202.133, is being moved to node Node-01, port e0c from node Node-01, port e0c because the port's health status is in a degraded state.
[Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus1 (on virtual server 1234567890), IP address 169.254.104.99, is being moved to node Node-01, port e0d from node Node-01, port e0c because the port's health status is in a degraded state.
[Node-01: vifmgr: vifmgr.portDeg.lifMoved:notice]: LIF Node-01_clus1 (on virtual server 1234567890), IP address 169.254.104.99, is being moved to node Node-01, port e0c from node Node-01, port e0c because the port's health status is in a degraded state.
[Node-01: vifmgr: vifmgr.lifmoved.linkdown:notice]: LIF Node-01_clus2 (on virtual server 1234567890), IP address 169.254.202.133, is being moved to node Node-01, port e0d.
[Node-01: vifmgr: vifmgr.lifmoved.linkdown:notice]: LIF Node-01_clus1 (on virtual server 1234567890), IP address 169.254.104.99, is being moved to node Node-01, port e0d.

  • Port Health Degraded Reasons shows link_flapping in NETWORK-PORTS.XML

202408140923.jpg

 

 

 

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