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Intermittent MccIp_PortOfflineAlert warnings reported on all nodes

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Category:
fabric-interconnect-and-management-switches
Specialty:
hw
Last Updated:

Applies to

  • ONTAP 9.8P5
  • Metrocluster IP
  • AFF A220
  • Cisco NX3232C network switches using X6589-R6 SFPs

Issue

  • All nodes within the metrocluster intermittently report issues with the cluster network ports
  • Messages such as the below can be observed

Thu Sep 23 05:02:45 +0000 [Node-S1-01: nchmd: hm.alert.raised:alert]: Alert Id = MccIp_PortOfflineAlert , Alerting Resource = Node-S1-01_e0b-20_e0b-20 raised by monitor node-connect
Tue Nov 09 15:25:10 +0000 [Node-S1-01: mgwd: callhome.hm.alert.major:alert]: Call home for Health Monitor process nchm: MccIp_PortOfflineAlert[Node-S1-02_e0a-10_e0a-10].

Wed Jun 30 23:51:49 +0000 [Node-S4-01: nchmd: hm.alert.raised:alert]: Alert Id = MccIp_PortOfflineAlert , Alerting Resource = Node-S4-01_e0a-10_e0a-10 raised by monitor node-connect
Tue Jul 13 11:15:54 +0000 [Node-S4-01: mgwd: callhome.hm.alert.major:alert]: Call home for Health Monitor process nchm: MccIp_PortOfflineAlert[Node-S4-02_e0a-10_e0a-10].
Wed Jul 14 10:01:49 +0000 [Node-S4-01: nchmd: hm.alert.raised:alert]: Alert Id = MccIp_PortOfflineAlert , Alerting Resource = Node-S4-01_e0b-20_e0b-20 raised by monitor node-connect

Fri Feb 11 10:02:35 +0000 [Node-S1-01: vifmgr: vifmgr.port.monitor.failed:error]: The "l2_reachability" health check for port e0a (node Node-S1-01) has failed. The port is operating in a degraded state.
Fri Feb 11 10:02:35 +0000 [Node-S1-01: vifmgr: callhome.clus.net.degraded:alert]: Call home for CLUSTER NETWORK DEGRADED: Insufficient L2 Reachability - Insufficient L2 Reachability detected from cluster port e0a on node Node-S1-01.

  • The link only recovers after rebooting either the node, or the network switch connected to the port
  • The show interface transceiver output displays a 10Gb SFP 
Ethernet1/9/1
transceiver is present
type is 10Gbase-SR
name is AVAGO
part number is AFBR-710SMZ
revision is G5. 1
serial number is XXXXXXXXXXX
nominal bitrate is 10300 MBit/sec
Link length supported for 50/125um OM2 fiber is 82 m
Link length supported for 50/125um OM3 fiber is 300 m
cisco id is 3
cisco extended id number is 4

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