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Continued packet loss when pinging from cluster lif to cluster lif

  1. Last updated
    Mar 11, 2024
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Category:
fas-systems
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nas
Last Updated:
3/11/2024, 10:07:54 AM

Applies to

  • ONTAP 9
  • Cisco Nexus cluster switches

Issue

  • Ping packets are being dropped when pinging from cluster lif of one node to to cluster lif of another node and the following alerts are seen in event logs:

[Node1: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif Node1_clus2 (node Node1) to cluster lif Node2_clus2 (node Node2)

[Node3: vifmgr: vifmgr.cluscheck.ctdpktloss:alert]: Continued packet loss when pinging from cluster lif Node3_clus1 (node Node3) to cluster lif Node4_clus2 (node Node4)

  • The cluster network is degraded due to this and the below event is reported:

[Node1: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: Large MTU Packet Loss - Ping failures detected between Node1_clus1 ( 169.254.XXX.XXX ) on Node1 and Node2_clus1 ( 169.254.XXX.XX ) on Node2

  • All the cluster ports on the nodes are configured with 9000 MTU:

Cluster::> network port show

Node: Node1
                                                  Speed(Mbps) Health
Port      IPspace      Broadcast Domain Link MTU  Admin/Oper  Status
--------- ------------ ---------------- ---- ---- ----------- --------
e0a       Cluster      Cluster          up   9000  auto/10000 healthy
e0b       Cluster      Cluster          up   9000  auto/10000 healthy

Node: node2
                                                  Speed(Mbps) Health
Port      IPspace      Broadcast Domain Link MTU  Admin/Oper  Status
--------- ------------ ---------------- ---- ---- ----------- --------
e0a       Cluster      Cluster          up   9000  auto/10000 healthy
e0b       Cluster      Cluster          up   9000  auto/10000 healthy

 

 

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