请教一个光口频繁闪断的问题

[xy411381121]

本帖最后由 xy411381121 于 2018-12-11 17:20 编辑
中心机房里的N7K，时不时就有光口闪断的日志产生，如下：
2018 Nov 26 22:32:38 KZ_N7K_01 %EIGRP-5-NBRCHANGE_DUAL: eigrp-600 [4256] (default-base) IP-EIGRP(0) 600: Neighbor 192.12.10.26 (Ethernet1/17) is down: stuck in active
2018 Nov 26 22:32:43 KZ_N7K_01 %EIGRP-5-NBRCHANGE_DUAL: eigrp-600 [4256] (default-base) IP-EIGRP(0) 600: Neighbor 192.12.10.26 (Ethernet1/17) is up: new adjacency
E1/17端口连接的是另一台N7K
而且偶尔还有XBAR的日志告警：
2018 Nov 26 22:23:32 KZ_N7K_01 %OC_USD-SLOT1-2-RF_CRC: OC2 received packets with CRC error from MOD SUP through XBAR slot 1/inst 1
用show int transceiver detail查看光衰：
Ethernet1/17
transceiver is present
type is 10Gbase-LR
name is CISCO-FINISAR
part number is FTLX1474D3BCL-CS
revision is A
serial number is FNS17280NH9
nominal bitrate is 10300 MBit/sec
Link length supported for 9/125um fiber is 10 km
cisco id is --
cisco extended id number is 4
cisco part number is 10-2457-02
cisco product id is SFP-10G-LR
cisco vendor id is V02
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 28.61 C 75.00 C -5.00 C 70.00 C 0.00 C
Voltage 3.29 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 34.06 mA 70.00 mA 1.00 mA 68.00 mA 2.00 mA
Tx Power 0.68 dBm 3.49 dBm -12.21 dBm 0.49 dBm -8.21 dBm
Rx Power -2.24 dBm 3.49 dBm -18.53 dBm 0.49 dBm -14.43 dBm
Transmit Fault Count = 1
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
请问这光衰正常吗？频繁的端口闪断与XBAR的告警有关系吗？光口频繁闪断可能是什么原因啊？光纤可能存在氧化等问题吗？有没有什么命令可以检查是否是光模块故障吗？

[YilinChen · Accepted solution]

楼主贴上来的这个端口，光衰看起来正常；建议同时检查 对端端口的状态
碰上这样的问题，最有效的办法，还是替换/排除法，换光模块、换尾纤；

[xy411381121]

YilinChen 发表于 2018-12-12 09:40
楼主贴上来的这个端口，光衰看起来正常；建议同时检查 对端端口的状态
碰上这样的问题，最有效的办法， ...

这是对端N7K光口是光衰情况：
Ethernet1/17
transceiver is present
type is 10Gbase-LR
name is CISCO-FINISAR
part number is FTLX1474D3BCL-CS
revision is A
serial number is FNS172813KM
nominal bitrate is 10300 MBit/sec
Link length supported for 9/125um fiber is 10 km
cisco id is --
cisco extended id number is 4
cisco part number is 10-2457-02
cisco product id is SFP-10G-LR
cisco vendor id is V02
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 28.98 C 75.00 C -5.00 C 70.00 C 0.00 C
Voltage 3.28 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 38.88 mA 70.00 mA 1.00 mA 68.00 mA 2.00 mA
Tx Power 0.34 dBm 3.49 dBm -12.21 dBm 0.49 dBm -8.21 dBm
Rx Power 0.68 dBm 3.49 dBm -18.53 dBm 0.49 dBm -14.43 dBm
Transmit Fault Count = 1
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
请问，这光衰在什么范围才算正常啊？

[zhengwei272]

-20之内完全ok的

[YilinChen]

xy411381121 发表于 2018-12-12 10:39
这是对端N7K光口是光衰情况：
Ethernet1/17
transceiver is present

这一侧光衰看起来也正常，建议有条件的话，通过更换光模块、尾纤方式验证链路稳定性

[xy411381121]

YilinChen 发表于 2018-12-12 12:37
这一侧光衰看起来也正常，建议有条件的话，通过更换光模块、尾纤方式验证链路稳定性

是不是只要在Warnings的高低至范围内，都是正常的？

[YilinChen]

xy411381121 发表于 2019-1-2 16:02
是不是只要在Warnings的高低至范围内，都是正常的？

是的,看起来都在正常范围内