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HP Virtual connect module connected to host port going down repeatedly

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ontap-9
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Applies to

Ontap 9

The HP blade VC module is the connection between host and FC fabric/blade switching module.

Issue

  • Virtual connect module connected  to host port reported pause flooding and it responds by disabling the host connected port and therby losing the path to the storage.

Virtual connect logs:

2021-03-07T02:52:57+01:00 VCEFX3C422301R4 vcmd: [ENET PORT:enc0:iobay2:d5:3102:Major]  : Port was disabled because a pause flood was detected.
2021-03-07T02:52:57+01:00 VCEFX3C422301R4 vcmd: [ENET PORT:enc0:iobay2:d5:v1:3102:Major]  : Port was disabled because a pause flood was detected.
2021-03-07T02:52:57+01:00 VCEFX3C422301R4 vcmd: [ENET PORT:enc0:iobay2:d5:v2:3102:Major]  : Port was disabled because a pause flood was detected.
2021-03-07T02:52:57+01:00 VCEFX3C422301R4 vcmd: [ENET PORT:enc0:iobay2:d5:v3:3102:Major]  : Port was disabled because a pause flood was detected.
2021-03-07T02:52:57+01:00 VCEFX3C422301R4 vcmd: [ENET:enc0:iobay2:3020:Minor] Enet Module state DEGRADED : 1 or more ports LOOP_DETECTED or PAUSE_FLOOD_DETECTED, Previous: Enet Module state OK, Cause: Port enc0:iobay2:d5 pause-flood detected and automatically disabled
2021-03-07T02:52:57+01:00 VCEFX3C422301R4 vcmd: [ENC:enc0:2014:Minor] Enclosure state DEGRADED : Some Enet modules & servers not OK, Previous: Enclosure state OK, Cause: Port enc0:iobay2:d5 pause-flood detected and automatically disabled

 

  • Additionally, the host connected ports were acting as "slow drain" devices on the switch end.
  • The Buffer credit time outs were observed on some of the NPIV ports logged in to the switch.

MAPS data on switch end:
 
Category(Violation Count)|RepeatCount|Rule Name                  |Execution Time   |Object           |Triggered Value(Units)|
-----------------------------------------------------------------------------------------------------------------------------
Port Health(6)           |5          |ALL_F_PORTS_C3TXT0         |03/04/21 20:26:52|F-Port 11/17     |140 Timeouts          |
                         |           |                           |                 |F-Port 10/16     |156 Timeouts          |
                         |           |                           |                 |F-Port 10/16     |120 Timeouts          |
                         |           |                           |                 |F-Port 3/27      |217 Timeouts          |
                         |           |                           |                 |F-Port 10/16     |139 Timeouts          |

 

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