Fibre Channel (SAN)

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New Contributor
Posts: 5
Registered: ‎02-16-2008

SFP voltage below Low Threshold.

Dear friends,

I have a problem with SFP.

All of a sudden the voltage of a group of SFP in one of our Core switch are below threshold ( Current - 760 mVolts).

In the group Only 2 ports out of 5 are enabled and connected to 10gb DWDM.

At the other end of this 10gb, the port Voltage is ok. ( in the range of 3200 mVolts).

Identifier:  6    XFP
Connector:   7    LC
Transceiver: 0000000000004040 10_GB/s SM lw Inter_dist
Encoding:    240  NRZ SONET 8B10B 64B66B
Baud Rate:   99   (units 100 megabaud)
Length 9u:   10   (units km)
Length 9u:   0    (units 100 meters)
Length 50u:  0    (units 10 meters)
Length 62.5u:0    (units 10 meters)
Length Cu:   0    (units 1 meter)
Vendor Name: AVAGO
Vendor OUI:  00:17:6a
Vendor PN:   HFCT-721XPD
Vendor Rev:    fX
Wavelength:  4000 (units nm)
Options:     641e Loss_of_Sig,Loss_of_Sig_Inverted,Tx_Fault,Tx_Disable
BR Max:      6
BR Min:      0
Serial No:   AA0736M18XJ
Date Code:   07090901
Temperature: 26 Centigrade
Current:     32.578 mAmps
Voltage:     768.0 mVolts
RX Power:    -7.2  dBm (189.2 uWatts)
TX Power:    -2.7  dBm (537.2 uWatts)

==============

2011/09/23-06:29:23, , 2618,, WARNING, , Sfp Supply Voltage for port 10/5, is below low boundary(High=3600, Low=3150). Current value is 768 mV.
2011/09/23-06:29:23, , 2617,, WARNING, , Sfp Supply Voltage for port 10/4, is below low boundary(High=3600, Low=3150). Current value is 793 mV.
2011/09/23-06:29:23, , 2616,, WARNING, , Sfp Supply Voltage for port 10/3, is below low boundary(High=3600, Low=3150). Current value is 793 mV.
2011/09/23-06:29:23, , 2615,, WARNING, , Sfp Supply Voltage for port 10/2, is below low boundary(High=3600, Low=3150). Current value is 742 mV.
2011/09/23-06:29:23, , 2614,, WARNING, , Sfp Supply Voltage for port 10/1, is below low boundary(High=3600, Low=3150). Current value is 742 mV.

Is this SFP is getting deteriorated, can anyone advice me.

Thanks,

ALok Sharma.

Super Contributor
Posts: 635
Registered: ‎04-12-2010

Re: SFP voltage below Low Threshold.

You have to check the data sheet of your SFP if the reported values are within the technical specs or not.

FabricWatch reports some defaults which may not fit to this specific SFP.

Check the http://www.avagotech.com/pages/en/optical_transceivers/storage/10g_fibre_channel/hfct-721xpd/

I hope this helps,

Andreas.

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