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CONTAP-301093:e0Mの高使用率時にSwitchUnreachable_Alert、SwitchSNMPCommunication_Alert、SwitchInfoUpdateFailure_Alertが表示されます。

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Category:
ontap-9
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hw
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問題

  • ONTAPイーサネットスイッチヘルスモニタ(CSHM)は、SwitchUnreachable_Alert、SwitchSNMPCommunication_Alert、SwitchInfoUpdateFailure_Alertのいずれかまたは両方について、次のアラートの一部またはすべてを生成します。

  • SNMPv3でCSHMによる監視が有効になっている場合、両方のスイッチでmessages.log「failed」からの次の「failed」メッセージが表示されます。例:

0000002e.12eaff0e 098ae1de Thu Feb 13 2025 20:20:34 +01:00 [kern_network_shelfd:info:1536] 0x80840f900: 0: ERR: dns_sd_lite::networking: get_query_sockets:src/networking.cc:871 Could not create query sockets
...
00000032.00761fb6 0126e281 Tue Sep 03 2024 22:31:26 +02:00 [kern_cshm:info:54360] [Sep  3 22:31:26]: 0x80b10fe00: 0: ERR: CSHM::helpers: snmpwalk:src/tables/cshm_helpers.cc:237 'switch1': Failed to fetch SNMPv3 engine information from sm_snmpEngine: SNMP timeout
...
[kern_cshm:info:29776] [Feb 13 20:20:34]: 0x80b11fb00: 0: ERR: CSHM::snmp: buildCommand:src/tables/cshm_helpers.cc:339 'switch1': Failed to add SNMPv3 engine information from sm_snmpEngine
...
0000002e.12eaff12 098ae1de Thu Feb 13 2025 20:20:34 +01:00 [kern_cshm:info:29776] [Feb 13 20:20:34]: 0x80b11fb00: 0: ERR: CSHM::snmp: buildCommand:src/tables/cshm_helpers.cc:217 'switch1': Failed to build SNMPv3 command

  • ノード管理e0Mポートの利用率が100%に達し、1Gbポートで100MB/秒を超えるスループットが達成されます。
  • e0Mのifstatの出力から、大量の「予期しない」トラフィックが送受信されたことがわかります。例: 

-- interface  e0M  (102 days, 15 hours, 25 minutes, 42 seconds) --
RECEIVE
Total frames:    275m | Frames/second:    31  | Total bytes:    74803m
Bytes/second:    8435  | Total errors:     0  | Errors/minute:     0
...
TRANSMIT
Total frames:    3726m | Frames/second:    420  | Total bytes:     559g
Bytes/second:   63080  | Total errors:     0  | Errors/minute:     0
...

-- interface  e0M  (1 day, 10 hours, 9 minutes, 55 seconds) --
RECEIVE
Total frames:    7903k | Frames/second:    64  | Total bytes:    2003m
Bytes/second:   16290  | Total errors:     0  | Errors/minute:     0
...
TRANSMIT
Total frames:   92516k | Frames/second:    752  | Total bytes:    13425m
Bytes/second:    109k | Total errors:     0  | Errors/minute:     0
...

-- interface  e0M  (8 days, 10 hours, 0 minutes, 19 seconds) --
RECEIVE
Total frames:   44625k | Frames/second:    61  | Total bytes:    11193m
Bytes/second:   15392  | Total errors:     0  | Errors/minute:     0
...
TRANSMIT
Total frames:    547m | Frames/second:    753  | Total bytes:    79676m
Bytes/second:    109k | Total errors:     0  | Errors/minute:     0
...

-- interface  e0M  (57 days, 9 hours, 53 minutes, 2 seconds) --
RECEIVE
Total frames:    405m | Frames/second:    82  | Total bytes:     176g
Bytes/second:   35513  | Total errors:     0  | Errors/minute:     0
...
TRANSMIT
Total frames:    3778m | Frames/second:    762  | Total bytes:     609g
Bytes/second:    122k | Total errors:     0  | Errors/minute:     0
...

  • メトリックが最も小さいネットワークルートが管理ポートと同じサブネットに設定されている。

 

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