08-19-2015 07:55 AM
Hello all,
I installed 2 10G Fiber Links for a port-channel.
One link is working fine and the other one has some problems.
Can somebody help me, to understand why I see for one of the 10Gbase-LR module such abnormal Current values ?
I moved the module and link to another free port and the fault moved with it too.
Therefore I expect to have a faulty 10Gbase-LR SFP module within the Port Nexus5548_1, eth1/24.
I am limited with my test possibilities as I can't disrupt the working link
and I have at the moment no free spare SFP module either.
Is there any additional useful test which I could do?
Many thanks for your answers in advanced.
Regards,
Lothar
Nexus5548_1# sh int eth1/24 trans detail
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Current 71.43 mA ++ 70.00 mA 1.00 mA 68.00 mA 2.00 mA
here are the other Current port values from the other SFP modules
Current 33.34 mA 85.00 mA 7.00 mA 80.00 mA 12.00 mA
Current 27.37 mA 85.00 mA 7.00 mA 80.00 mA 12.00 mA
Current 0.00 mA -- 85.00 mA 7.00 mA 80.00 mA 12.00 mA
!====================================================================================
First 10G Fiber Link works fine
!====================================================================================
Nexus5548_1# sh int eth1/23 trans detail
Ethernet1/23
transceiver is present
type is 10Gbase-LR
name is CISCO-FINISAR
part number is FTLX1471D3BCL-CS
revision is A
serial number is xxxxxxxxxxxx
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
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 42.91 C 90.00 C -10.00 C 85.00 C -5.00 C
Voltage 3.23 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 33.34 mA 85.00 mA 7.00 mA 80.00 mA 12.00 mA
Tx Power -4.17 dBm 0.49 dBm -8.41 dBm 0.00 dBm -7.39 dBm
Rx Power -7.79 dBm 1.49 dBm -21.54 dBm 0.49 dBm -19.20 dBm
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
Nexus5548_2# sh int eth1/23 trans detail
Ethernet1/23
transceiver is present
type is 10Gbase-LR
name is CISCO-FINISAR
part number is FTLX1471D3BCL-CS
revision is A
serial number is xxxxxxxxxxxx
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
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 42.20 C 90.00 C -10.00 C 85.00 C -5.00 C
Voltage 3.23 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 27.37 mA 85.00 mA 7.00 mA 80.00 mA 12.00 mA
Tx Power -3.57 dBm 0.49 dBm -8.41 dBm 0.00 dBm -7.39 dBm
Rx Power -4.90 dBm 1.49 dBm -21.54 dBm 0.49 dBm -19.20 dBm
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
!====================================================================================
Second 10G Fiber Link faces connection problems
!====================================================================================
Nexus5548_1# sh int eth1/24 trans detail
Ethernet1/24
transceiver is present
type is 10Gbase-LR
name is CISCO-FINISAR
part number is FTLX1474D3BCL-CS
revision is A
serial number is xxxxxxxxxxxx
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
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 57.07 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 71.43 mA ++ 70.00 mA 1.00 mA 68.00 mA 2.00 mA
Tx Power -2.72 dBm 3.49 dBm -12.21 dBm 0.49 dBm -8.21 dBm
Rx Power -23.01 dBm -- 3.49 dBm -18.53 dBm 0.49 dBm -14.43 dBm
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
Nexus5548_1# sh int eth1/24
Ethernet1/24 is down (Link not connected)
Dedicated Interface
Belongs to Po1
Hardware: 1000/10000 Ethernet, address: xxxx.xxxx.xxxx (bia xxxx.xxxx.xxxx)
Description: --- to Nexus5548_2, E1/24 (ch-gr 1)
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is trunk
auto-duplex, 10 Gb/s, media type is 10G
Beacon is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
EtherType is 0x8100
Last link flapped 2d20h
Last clearing of "show interface" counters 2d19h
30 seconds input rate 0 bits/sec, 0 packets/sec
30 seconds output rate 0 bits/sec, 0 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
RX
0 unicast packets 0 multicast packets 0 broadcast packets
0 input packets 0 bytes
0 jumbo packets 0 storm suppression bytes
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
0 unicast packets 0 multicast packets 0 broadcast packets
0 output packets 0 bytes
0 jumbo packets
0 output errors 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
0 interface resets
Nexus5548_2# sh int eth1/24 trans detail
Ethernet1/24
transceiver is present
type is 10Gbase-LR
name is CISCO-FINISAR
part number is FTLX1471D3BCL-CS
revision is A
serial number is xxxxxxxxxxxx
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
SFP Detail Diagnostics Information (internal calibration)
----------------------------------------------------------------------------
Current Alarms Warnings
Measurement High Low High Low
----------------------------------------------------------------------------
Temperature 43.74 C 90.00 C -10.00 C 85.00 C -5.00 C
Voltage 3.23 V 3.63 V 2.97 V 3.46 V 3.13 V
Current 0.00 mA -- 85.00 mA 7.00 mA 80.00 mA 12.00 mA
Tx Power -20.00 dBm -- 0.49 dBm -8.41 dBm 0.00 dBm -7.39 dBm
Rx Power -1.82 dBm 1.49 dBm -21.54 dBm 0.49 dBm -19.20 dBm
----------------------------------------------------------------------------
Note: ++ high-alarm; + high-warning; -- low-alarm; - low-warning
Nexus5548_2# sh int eth1/24
Ethernet1/24 is down (linkFlapErrDisabled)
Dedicated Interface
Belongs to Po1
Hardware: 1000/10000 Ethernet, address: xxxx.xxxx.xxxx (bia xxxx.xxxx.xxxx)
Description: --- to Nexus5548_1, E1/24 (ch-gr 1)
MTU 1500 bytes, BW 10000000 Kbit, DLY 10 usec
reliability 255/255, txload 1/255, rxload 1/255
Encapsulation ARPA
Port mode is trunk
auto-duplex, 10 Gb/s, media type is 10G
Beacon is turned off
Input flow-control is off, output flow-control is off
Rate mode is dedicated
Switchport monitor is off
EtherType is 0x8100
Last link flapped 2d20h
Last clearing of "show interface" counters 2d19h
30 seconds input rate 0 bits/sec, 0 packets/sec
30 seconds output rate 0 bits/sec, 0 packets/sec
Load-Interval #2: 5 minute (300 seconds)
input rate 0 bps, 0 pps; output rate 0 bps, 0 pps
RX
0 unicast packets 0 multicast packets 0 broadcast packets
0 input packets 0 bytes
0 jumbo packets 0 storm suppression bytes
0 runts 0 giants 0 CRC 0 no buffer
0 input error 0 short frame 0 overrun 0 underrun 0 ignored
0 watchdog 0 bad etype drop 0 bad proto drop 0 if down drop
0 input with dribble 0 input discard
0 Rx pause
TX
0 unicast packets 0 multicast packets 0 broadcast packets
0 output packets 0 bytes
0 jumbo packets
0 output errors 0 collision 0 deferred 0 late collision
0 lost carrier 0 no carrier 0 babble 0 output discard
0 Tx pause
0 interface resets
!====================================================================================
08-19-2015 09:08 AM
It appears to be a faulty SFP.
I base that on the fact that we see the Tx optical power value range spike down to -20 dBm.
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