簡介
本檔案介紹由於Altos ASIC中的硬體問題而導致的Nexus 5010/5020交換器問題(錯誤訊息%NOHMS-2-NOHMS_DIAG_ERROR:第1單元：運行時診斷檢測到主要事件：Port Failure)，並提供該問題的解決方案。
必要條件
需求
思科建議您瞭解Nexus CLI。
採用元件
本文檔中的資訊僅基於Cisco Nexus 5010/5020交換機。它不會影響Cisco Nexus 5548/5596交換機。
本文中的資訊是根據特定實驗室環境內的裝置所建立。文中使用到的所有裝置皆從已清除（預設）的組態來啟動。如果您的網路正在作用，請確保您已瞭解任何指令可能造成的影響。
問題
卡2上的多個介面關閉，您會看到以下警報：
N5020 %$ VDC-1 %$ %NOHMS-2-NOHMS_DIAG_ERROR: Module 1: Runtime diag detected major event
警報表明卡故障，但某些埠已開啟。即使Nexus 5020交換機處於聯機狀態，插槽2中的光纖通道(FC)模組也處於離線狀態。輸入show module命令以檢視模組的狀態：
Mod Ports Module-Type Model Status
--- ----- -------------------------------- ---------------------- ------------
1 40 40x10GE/Supervisor N5K-C5020P-BF-SUP active *
2 8 8x1/2/4G FC Module N5K-M1008 offline <<<<<<
Mod Sw Hw World-Wide-Name(s) (WWN)
--- -------------- ------ --------------------------------------------------
1 4.2(1)N2(1) 1.3 --
2 4.2(1)N2(1) 1.0 77:9f:b7:62:2f:6c:69:62 to 00:00:00:b8:27:0a:08:2c
輸入show environment命令以檢視模組環境資料。
Mod Model Power Power Power Power Status
Requested Requested Allocated Allocated
(Watts) (Amp) (Watts) (Amp)
--- ---------------------- ------- ---------- --------- ---------- ----------
1 N5K-C5020P-BF-SUP 625.20 52.10 625.20 52.10 powered-up
2 N5K-M1008 9.96 0.83 9.96 0.83 fail/shutdown
輸入show logging nvram命令以檢視此輸出：
N5020 %$ VDC-1 %$ %NOHMS-2-NOHMS_DIAG_ERROR: Module 1: Runtime diag detected major event:
Port failure: Ethernet1/1
N5020 %$ VDC-1 %$ last message repeated 2 times
N5020 %$ VDC-1 %$ %NOHMS-2-NOHMS_DIAG_ERROR: Module 1: Runtime diag detected major event:
Port failure: Ethernet1/2
N5020 %$ VDC-1 %$ last message repeated 7 times
N5020 %$ VDC-1 %$ %NOHMS-2-NOHMS_DIAG_ERROR: Module 1: Runtime diag detected major event:
Port failure: Ethernet1/5
N5020 %$ VDC-1 %$ last message repeated 3 times
N5020 %$ VDC-1 %$ %NOHMS-2-NOHMS_DIAG_ERROR: Module 1: Runtime diag detected major event:
Port failure: Ethernet1/13
從日誌中可以看到，多個埠未通過運行時診斷。此外，每個Gatos ASIC的兩個埠都會報告「硬體故障」，因為交換矩陣已關閉。輸入show interface brief 命令以檢視此輸出：
--------------------------------------------------------------------------------
Ethernet VLAN Type Mode Status Reason Speed Port
Interface Ch #
--------------------------------------------------------------------------------
Eth1/1 1 eth fabric down Hardware failure 10G(D) 138
Eth1/2 1 eth fabric down Hardware failure 10G(D) 138
Eth1/3 1 eth fabric up none 10G(D) 138
Eth1/4 1 eth fabric up none 10G(D) 138
Eth1/5 1 eth fabric down Hardware failure 10G(D) 140
Eth1/6 1 eth fabric down Hardware failure 10G(D) 140
Eth1/7 1 eth fabric up none 10G(D) 140
Eth1/8 1 eth fabric up none 10G(D) 140
Gatos ASIC報告某些埠的故障並禁用它們。輸入show hardware internal gatos event-history error命令以檢視此輸出：
1) Event:E_DEBUG, length:81, at 775734 usecs after Fri May 24 15:28:10 2013
[101] xcvr_set_port_to_hw_failure(): Sending nohms failure notif for port xgb1/13
2) Event:E_DEBUG, length:44, at 775726 usecs after Fri May 24 15:28:10 2013[100] CODE-PATH:
xcvr_set_port_to_hw_failure
935) Event:E_DEBUG, length:34, at 434695 usecs after Fri May 24 15:28:06 2013[100] CODE-PATH:
xcvr_port_disable
936) Event:E_DEBUG, length:38, at 434653 usecs after Fri May 24 15:28:06 2013[100] CODE-PATH:
xcvr_set_port_disable
937) Event:E_DEBUG, length:81, at 408233 usecs after Fri May 24 15:28:06 2013
[101] xcvr_set_port_to_hw_failure(): Sending nohms failure notif for port xgb1/30
938) Event:E_DEBUG, length:44, at 408224 usecs after Fri May 24 15:28:06 2013 [100] CODE-PATH:
xcvr_set_port_to_hw_failure
在Altos ASIC中，由於同步問題導致交換矩陣互聯(FI)重置，因此出現了許多「錯誤中斷」消息。輸入show hardware internal altos event-history errors命令以檢視此輸出：
1) Event:E_DEBUG, length:131, at 959201 usecs after Fri May 24 14:19:20 2013
[100] Threshold reached for error interrupt - ALT_FIC3_INT_3_XGXS_rx2_loss_of_sync, flags:
0xa8, fabric port: 15, Action: fi-reset
2) Event:E_DEBUG, length:122, at 372727 usecs after Fri May 24 14:15:05 2013
[100] Threshold reached for interrupt - ALT_FIC6_INT_0_XGXS_EXT_serdes_rx2_sync, masking it
(threshold=3 period=10 msecs)
453) Event:E_DEBUG, length:122, at 658189 usecs after Fri May 24 03:38:48 2013
[100] Threshold reached for interrupt - ALT_FIC6_INT_1_XGXS_EXT_serdes_rx0_sync, masking it
(threshold=3 period=10 msecs)
454) Event:E_DEBUG, length:129, at 658137 usecs after Fri May 24 03:38:48 2013
[100] Threshold reached for error interrupt - ALT_FIC6_INT_1_XGXS_rx2_code_eerror, flags:
0xa8, fabric port: 25, Action: fi-reset
解決方案
問題是由於Altos ASIC中的硬體問題。如需更換Nexus 5000系列交換機，請聯絡Cisco技術支援中心(TAC)。
意見