Cisco N5K-C5010P-BF Troubleshooting Guide - Page 120

Registers and Counters, Identifying physical layer issues, Low Alarm for RxPower

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Registers and Counters Chapter 5 Troubleshooting SAN Switching Issues Send document comments to [email protected]. Registers and Counters Identifying physical layer issues To troubleshoot physical layer issues with Fibre Channel SFP optics, use the following command: switch# show interface fc x/y transceiver details In the following example, you can see that the results of the command contains useful information such as supported speed, nominal bit rate, and link lengths supported for the SFP. Example: switch# show interface fc 3/1 transceiver details fc3/1 sfp is present name is CISCO-FINISAR part number is FTLF8524P2BNL-C2 revision is 0000 serial number is FNS0928K161 fc-transmitter type is short wave laser w/o OFC (SN) fc-transmitter supports intermediate distance link length media type is multi-mode, 62.5m (M6) Supported speed is 400 MBytes/sec Nominal bit rate is 4300 MBits/sec Link length supported for 50/125mm fiber is 150 m(s) Link length supported for 62.5/125mm fiber is 70 m(s) cisco extended id is unknown (0x0) no tx fault, no rx loss, in sync state, Diag mon type 104 The command also provides detailed SFP diagnostic information and warnings and alarms, if any. Example: SFP Detail Diagnostics Information Alarms Warnings High Low High Low Temperature 41.50 C 95.00 C -25.00 C 90.00 C -20.00 C Voltage 3.45 V 3.90 V 2.70 V 3.70 V 2.90 V Current 7.18 mA 17.00 mA 1.00 mA 14.00 mA 2.00 mA Tx Power -4.41 dBm -2.00 dBm -11.74 dBm -2.00 dBm -11.02 dBm Rx Power -4.40 dBm 1.00 dBm -20.00 dBm -1.00 dBm -18.24 dBm Transmit Fault Count = 0 Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning Two example outputs from the command follow. The first shows a low alarm for Rx Power. The second shows low alarms for Tx, Rx, and Current. The interface for the second example was in an Error Disabled state due to the bit error rate being too high. Low Alarm for RxPower Alarms Warnings High Low High Low Temperature 35.02 C 70.00 C 0.00 C 70.00 C 0.00 C 5-48 Cisco Nexus 5000 Series Troubleshooting Guide OL-25300-01

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Send document comments to [email protected].
5-48
Cisco Nexus 5000 Series Troubleshooting Guide
OL-25300-01
Chapter 5
Troubleshooting SAN Switching Issues
Registers and Counters
Registers and Counters
Identifying physical layer issues
To troubleshoot physical layer issues with Fibre Channel SFP optics, use the following command:
switch# show interface fc x/y transceiver details
In the following example, you can see that the results of the command contains useful information such
as supported speed, nominal bit rate, and link lengths supported for the SFP.
Example:
switch# show interface fc 3/1 transceiver details
fc3/1 sfp is present
name is CISCO-FINISAR
part number is FTLF8524P2BNL-C2
revision is 0000
serial number is FNS0928K161
fc-transmitter type is short wave laser w/o OFC (SN)
fc-transmitter supports intermediate distance link length
media type is multi-mode, 62.5m (M6)
Supported speed is 400 MBytes/sec
Nominal bit rate is 4300 MBits/sec
Link length supported for 50/125mm fiber is 150 m(s)
Link length supported for 62.5/125mm fiber is 70 m(s)
cisco extended id is unknown (0x0)
no tx fault, no rx loss, in sync state, Diag mon type 104
The command also provides detailed SFP diagnostic information and warnings and alarms, if any.
Example:
SFP Detail Diagnostics Information
----------------------------------------------------------------------------
Alarms
Warnings
High
Low
High
Low
----------------------------------------------------------------------------
Temperature
41.50 C
95.00 C
-25.00 C
90.00 C
-20.00 C
Voltage
3.45 V
3.90 V
2.70 V
3.70 V
2.90 V
Current
7.18 mA
17.00 mA
1.00 mA
14.00 mA
2.00 mA
Tx Power
-4.41 dBm
-2.00 dBm
-11.74 dBm
-2.00 dBm
-11.02 dBm
Rx Power
-4.40 dBm
1.00 dBm
-20.00 dBm
-1.00 dBm
-18.24 dBm
Transmit Fault Count = 0
----------------------------------------------------------------------------
Note: ++
high-alarm; +
high-warning; --
low-alarm; -
low-warning
Two example outputs from the command follow. The first shows a low alarm for Rx Power. The second
shows low alarms for Tx, Rx, and Current. The interface for the second example was in an Error Disabled
state due to the bit error rate being too high.
Low Alarm for RxPower
----------------------------------------------------------------------------
Alarms
Warnings
High
Low
High
Low
----------------------------------------------------------------------------
Temperature
35.02 C
70.00 C
0.00 C
70.00 C
0.00 C