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MetroCluster IP バックエンドスイッチの ISL ポートでの出力破棄

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環境

  • ONTAP 9
  • MetroCluster IP
  • バックエンドスイッチ 

問題

  • バックエンドスイッチは、ISLリンク上で出力破棄の回数が増加していることを報告しています: 
CiscoA1# show interface Ethernet 1/19 
Ethernet1/19 is up 
..
 TX
   72364381398 unicast packets  246446 multicast packets  1439 broadcast packets
   72364629283 output packets  228470689444346 bytes
   27435311682 jumbo packets
   0 output error  0 collision  0 deferred  0 late collision
   0 lost carrier  0 no carrier  0 babble  7905858 output discard
   0 Tx pause
  • コントローラに接続されたポートは、着信トラフィックを減速させるためにポーズフレームを送信しています: 

CiscoA1# show interface Ethernet 1/9 
Ethernet1/9 is up 
..
  TX
   22205893584 unicast packets  246446 multicast packets  2558 broadcast packets
   22206142588 output packets  89170173974575 bytes
   10609662061 jumbo packets
   0 output error  0 collision  0 deferred  0 late collision
   0 lost carrier  0 no carrier  0 babble  0 output discard
  4687218 Tx pause

  • 同期されていないNVLOGが原因で一時的なtakeover disabledが報告されました: 
Wed Jul 02 05:05:01 +0200 [nvmm.mirror.aborting: mirror of sysid 2, partner_type DR PARTNER and mirror state NVMM_MIRROR_ONLINE is aborted because of reason NVMM_ERR_IO.
Wed Jul 02 05:05:01 +0200[nodeA2: cf_main: cf.fsm.takeoverOfPartnerDisabled:error]: Failover monitor: takeover of nodeA1 disabled (unsynchronized log).
  • エンドユーザーはレイテンシや動作の遅さを経験する可能性があります 

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