1.端口下出現(xiàn)CRC錯包統(tǒng)計
例如：
XGigabitEthernet0/0/1 current state : UP
Line protocol current state : UP
Description:
Switch Port, Link-type : access(negotiated),
PVID : 1, TPID : 8100(Hex), The Maximum Frame Length is 9012
IP Sending Frames' Format is PKTFMT_ETHNT_2, Hardware address is 4cf9-5d39-efa0
Current system time: 2017-12-08 14:10:22
Port Mode: COMMON FIBER, Transceiver: UNKNOWN_SFP
Speed : 10000, Loopback: NONE
Duplex: FULL, Negotiation: DISABLE
Mdi : -, Flow-control: DISABLE
Last 300 seconds input rate 1981032 bits/sec, 789 packets/sec
Last 300 seconds output rate 13763216 bits/sec, 1234 packets/sec
Input peak rate 3900736744 bits/sec, Record time: 2016-12-20 15:58:51
Output peak rate 1579418400 bits/sec, Record time: 2017-06-11 07:56:25
Input: 8074383226 packets, 3301841306523 bytes
Unicast: 8072437737, Multicast: 1008305
Broadcast: 1, Jumbo: 0
Discard: 0, Pause: 937183
Frames: 0
Total Error: 828399
CRC: 838399, Giants: 0
Runts: 0, DropEvents: 0
Alignments: 0, Symbols: 0
Ignoreds: 0
Output: 11492763448 packets, 15396671657189 bytes
Unicast: 11475385794, Multicast: 16770945
Broadcast: 606709, Jumbo: 0
Discard: 12, Pause: 0
Total Error: 0
Collisions: 0, Late Collisions: 0
Deferreds: 0
Input bandwidth utilization threshold : 80.00%
Output bandwidth utilization threshold: 80.00%
Input bandwidth utilization : 0.02%
Output bandwidth utilization : 0.14%
發(fā)現(xiàn)接口的Input方向存在CRC的錯包則表示曾經(jīng)或者現(xiàn)在存在上游發(fā)出的包里面存在錯包現(xiàn)象
需要排查
解決方案：檢查上游設(shè)備狀態(tài)，是否存在丟包，光功率不正常等現(xiàn)象，
如果之前就出現(xiàn)了，但是存在數(shù)據(jù)沒有清除需要觀察包的數(shù)量是否增加，如果沒有增加可以將接口下清除統(tǒng)計信息，避免不必要的報錯，通過命令 reset count interface XG 0/0/1 清除接口下所有的數(shù)據(jù)統(tǒng)計信息。
2.查看光模塊的參數(shù)信息，存在異常
[G14_WR_NE20E_A-diagnose]display optical-module extend information slot 17 card 14
===============================================================================
Transceiver Digital Diagnostic Monitoring (DDM), Internally Calibrated
=============|=================================================================
Card14-Port0 + Value HighAlarm HighWarn LowWarn LowAlarm Status
-------------|-----------------------------------------------------------------
Temperature(C) 34.527 80.000 70.000 0.000 -10.000 Normal
Supply Voltage(V) 3.307 3.630 3.465 3.135 2.970 Normal
Tx Bias(mA) 5.340 20.000 15.000 1.000 1.000 Normal
Tx Power(avg dBm) -2.281 0.999 -1.000 -7.300 -9.299 Normal
Rx Power(avg dBm) -40.000 0.999 -1.000 -9.901 -11.897 Abnormal
=============|=================================================================
接受的光功率過低，可能為光纖沒有接好，或者對端沒有發(fā)光
3.電源顯示不正常
display power
------------------------------------------------------------
Slot PowerID Online Mode State Power(W)
------------------------------------------------------------
1 PWR1 Present AC NotSupply 150.00
1 PWR2 Present AC Supply 150.00
2 PWR1 Present AC NotSupply 150.00
2 PWR2 Present AC Supply 150.00
AC為交流電源
DC為直流電源
可能原因：
客戶就是單電源，并沒有第二塊電源模塊
有第二塊電源，但是沒有加電
確實電源掉電
4.運行的配置文件與保存的配置文件不一致
display configuration changes
5.SNMP協(xié)議版本檢查
SNMP version running in the system:
SNMPv2c SNMPv3
出現(xiàn)配置時同時兼容多個SNMP的版本，沒有影響
6.根據(jù)現(xiàn)網(wǎng)中報的速率判斷如果操作是否會影響業(yè)務(wù)
Last 300 seconds input rate 448792 bits/sec, 62 packets/sec
Last 300 seconds output rate 506664 bits/sec, 71 packets/sec
多采幾次將input和output的包速率加起來判斷是否有大量的業(yè)務(wù)運行
7.出現(xiàn)MAC地址飄移
display trapbuffer
#Feb 8 2017 18:37:18+08:00 C05_NAS_S5720_CSS L2IFPPI/4/MFLPVLANALARM:OID 1.3.6.1.4.1.2011.5.25.160.3.7 MAC move detected, VLANID = 3, MacAddress = 244c-0733-3205, Original-Port = Eth-Trunk100, Flapping port = XGE1/0/1. Please check the network accessed to flapping port.
可能原因：
客戶端的移動---此時會在日志中出現(xiàn)簡單的一條MAC飄移，沒有影響
但是如果出現(xiàn)大量的MAC漂移日志，顯示同一mac飄移，可能存在二層的環(huán)路，或者遭受***，檢查stp的狀態(tài)，MAC飄移表
------------------------------------------------------------------------------
Move-Time VLAN MAC-Address Original-Port Move-Ports MoveNum
-------------------------------------------------------------------------------
S:2011-08-31 17:22:36 300 0000-0000-0007 Eth-Trunk1 Eth-Trunk2 81
E:2011-08-31 17:22:44
-------------------------------------------------------------------------------
可以通過配置MAC地址的同優(yōu)先級不能覆蓋，靜態(tài)綁定，允許接入的大MAC數(shù)量
8. 單板工作不正常
display device
CE12808's Device status:
--------------------------------------------------------------------------------
Slot Card Type Online Power Register Alarm Primary
--------------------------------------------------------------------------------
1 - CE-L48XS-EC Present On Registered Normal NA
3 - CE-L48GS-EA Present On Registered Normal NA
5 - CE-L48GT-EA Present On Registered Normal NA
9 - CE-MPUA Present On Registered Normal Master
10 - CE-MPUA Present On Registered Normal Slave
11 - CE-CMUA Present On Registered Normal Master
12 - CE-CMUA Present On Registered Normal Slave
13 - CE-SFU08A Present On Registered Normal NA
14 - CE-SFU08A Present On Registered Normal NA
15 - CE-SFU08A Present On Registered Normal NA
16 - CE-SFU08A Present On Registered Normal NA
17 - CE-SFU08A Present On Registered Normal NA
18 - - Present Off Unregistered - NA
PWR1 - PAC-2700WA Present On Registered Normal NA
PWR2 - PAC-2700WA Present On Registered Normal NA
PWR3 - PAC-2700WA Present On Registered Normal NA
PWR4 - PAC-2700WA Present On Registered Normal NA
PWR5 - PAC-2700WA Present On Registered Normal NA
PWR6 - PAC-2700WA Present On Registered Normal NA
PWR7 - PAC-2700WA Present On Registered Normal NA
PWR8 - PAC-2700WA Present On Registered Normal NA
FAN1 - FAN-12C Present On Registered Normal NA
FAN2 - FAN-12C Present On Registered Normal NA
FAN3 - FAN-12C Present On Registered Normal NA
FAN4 - FAN-12C Present On Registered Normal NA
FAN5 - FAN-12C Present On Registered Normal NA
FAN6 - FAN-12C Present On Registered Normal NA
FAN7 - FAN-12C Present On Registered Normal NA
FAN8 - FAN-12C Present On Registered Normal NA
FAN9 - FAN-12C Present On Registered Normal NA
FAN10 - FAN-12C Present On Registered Normal NA
FAN11 - FAN-12C Present On Registered Normal NA
FAN12 - FAN-12C Present On Registered Normal NA
FAN13 - FAN-12C Present On Registered Normal NA
--------------------------------------------------------------------------------
Switchover State : Ready
Switchover Policy : Board Switchover
MainBoard : 9
SlaveBoard : 10
建議查看單板是否插緊或者更換單板，可能是沒有插板卡
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