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NetApp Knowledge Base

Flapping port observed on a switchless cluster

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Category:
fas-systems
Specialty:
hw
Last Updated:

Applies to

Switchless cluster systems (nodes directly connected through cluster ports)

Issue

  • A constantly flapping link brings the port down on the cluster. Example:
[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.

 

 
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