Cluster Network Packet Loss Alerts

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Category:: fas-systems

Specialty:: hw

Last Updated:

Applies to

NetApp ONTAP 9.16.1P7 (Cluster Mode)
FAS9000 Series
Cluster Network Switches

Issue

The cluster reported intermittent alerts related to packet loss between cluster LIFs, including:

[vifmgr.cluscheck.droppedlarge:alert]: Partial packet loss when pinging from cluster LIF Node1_clus2 (node 1) to cluster LIF Node1_clus1 (node 2).
[vifmgr.cluscheck.droppedall:alert]: Total packet loss when pinging from cluster LIF Node1_clus2  (node 1) to cluster LIF Node1_clus1 (node 2).
[vifmgr.cluscheck.droppednone:notice]: No packet loss when pinging from cluster LIF Node1_clus2  
(node 1) to cluster LIF Node1_clus1 (node 2).

Sw1:
Ethernet1/XX
    transceiver is present
    type is QSFP-40G-CSR4
    name is CISCO-FINISAR
    part number is FTL410QD4C-C1
    revision is A
    serial number is FIW253301AR
    nominal bitrate is 10300 MBit/sec per channel
    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 13
    cisco extended id number is 16
    cisco part number is 10-2837-03
    cisco product id is QSFP-40G-CSR4
    cisco version id is V03

Lane Number:1 Network Lane
           SFP Detail Diagnostics Information (internal calibration)
  ----------------------------------------------------------------------------
                Current              Alarms                  Warnings
                Measurement     High        Low         High          Low
  ----------------------------------------------------------------------------
  Temperature   29.69 C        75.00 C     -5.00 C     70.00 C        0.00 C
  Voltage        3.30 V         3.63 V      2.97 V      3.46 V        3.10 V
  Current        7.55 mA       15.00 mA     2.00 mA    14.00 mA       3.00 mA
  Tx Power      -1.48 dBm       2.99 dBm  -11.30 dBm    0.00 dBm     -7.30 dBm
  Rx Power     -10.79 dBm  -    2.99 dBm  -13.90 dBm    0.00 dBm     -9.90 dBm
  Transmit Fault Count = 0
  ----------------------------------------------------------------------------
  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

Lane Number:2 Network Lane
           SFP Detail Diagnostics Information (internal calibration)
  ----------------------------------------------------------------------------
                Current              Alarms                  Warnings
                Measurement     High        Low         High          Low
  ----------------------------------------------------------------------------
  Temperature   29.69 C        75.00 C     -5.00 C     70.00 C        0.00 C
  Voltage        3.30 V         3.63 V      2.97 V      3.46 V        3.10 V
  Current        7.36 mA       15.00 mA     2.00 mA    14.00 mA       3.00 mA
  Tx Power      -2.07 dBm       2.99 dBm  -11.30 dBm    0.00 dBm     -7.30 dBm
  Rx Power     -11.85 dBm  -    2.99 dBm  -13.90 dBm    0.00 dBm     -9.90 dBm
  Transmit Fault Count = 0
  ----------------------------------------------------------------------------
  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

Lane Number:3 Network Lane
           SFP Detail Diagnostics Information (internal calibration)
  ----------------------------------------------------------------------------
                Current              Alarms                  Warnings
                Measurement     High        Low         High          Low
  ----------------------------------------------------------------------------
  Temperature   29.69 C        75.00 C     -5.00 C     70.00 C        0.00 C
  Voltage        3.30 V         3.63 V      2.97 V      3.46 V        3.10 V
  Current        7.68 mA       15.00 mA     2.00 mA    14.00 mA       3.00 mA
  Tx Power      -2.15 dBm       2.99 dBm  -11.30 dBm    0.00 dBm     -7.30 dBm
  Rx Power     -10.60 dBm  -    2.99 dBm  -13.90 dBm    0.00 dBm     -9.90 dBm
  Transmit Fault Count = 0
  ----------------------------------------------------------------------------
  Note: ++  high-alarm; +  high-warning; --  low-alarm; -  low-warning

Lane Number:4 Network Lane
           SFP Detail Diagnostics Information (internal calibration)
  ----------------------------------------------------------------------------
                Current              Alarms                  Warnings
                Measurement     High        Low         High          Low
  ----------------------------------------------------------------------------
  Temperature   29.69 C        75.00 C     -5.00 C     70.00 C        0.00 C
  Voltage        3.30 V         3.63 V      2.97 V      3.46 V        3.10 V
  Current        7.48 mA       15.00 mA     2.00 mA    14.00 mA       3.00 mA
  Tx Power      -1.99 dBm       2.99 dBm  -11.30 dBm    0.00 dBm     -7.30 dBm
  Rx Power     -10.55 dBm  -    2.99 dBm  -13.90 dBm    0.00 dBm     -9.90 dBm
  Transmit Fault Count = 0
  ----------------------------------------------------------------------------

Cluster port statistics showed zero errors, but switch interface diagnostics indicated input errors on ISL port Ethernet1/xx and port-channel1 on sw1, and output errors on interfaces connected to ports on multiple nodes.

Optical diagnostics revealed low receive optical power on Ethernet1/xx on one switch, close to warning threshold.