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Abnormal Current values for a SFP 10Gbase-LR module on a Nexus 5548 switch

lwardeng
Level 1
Level 1

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

!====================================================================================

1 Reply 1

Marvin Rhoads
Hall of Fame
Hall of Fame

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.