topic Re: Normal Rx Power range for 10gb optics in ExtremeSwitching (EXOS/Switch Engine)

Normal Rx Power range for 10gb optics

Keith9 — Wed, 24 Mar 2021 04:27:42 GMT

Hello,

Just put a new 3 switch stack of 5520’s in a site and I’m wondering if this one RX power is to be alarmed about.

All ports below are 10gbps 850nm sm. See the one for port 2:59 has a * (star) next to RxPower. Is that bad? Indicative of just needing the ports on either end cleaned and the cable?

Port Temp TxPower RxPower TxBiasCurrent Voltage-Aux1/ Voltage-Aux2
(Celsius) (dBm) (dBm) (mA) Vcc (Volts) (Volts)
================================================================================
1:57 26.75 -2.00 -2.97 6.17 3.34 N/A
1:59 27.56 -2.20 -2.59 6.01 3.34 N/A
2:59 28.78 -1.57 -0.74* 6.64 3.39 N/A
2:60 27.16 -2.00 -3.03 6.34 3.39 N/A
3:58 27.16 -1.93 -1.38 6.05 3.34 N/A
3:59 27.16 -2.13 -1.91 6.13 3.37 N/A
3:60 26.56 -2.03 -2.85 5.62 3.22 N/A
================================================================================
N/A - parameter not applicable to transceiver connected to the port
D - Optic supports Digital Diagnostic Monitoring Interface (DDMI) which is off
* - value is out of normal range
-inf - negative infinity, parameter not defined

Re: Normal Rx Power range for 10gb optics

OscarK — Wed, 24 Mar 2021 14:27:37 GMT

Check show port transceiver info detail.

It will show if the port is in the normal range or not and what the normal range is.

Cleaning or change cables would probably improve the rxPower.

Re: Normal Rx Power range for 10gb optics

Keith9 — Wed, 24 Mar 2021 20:49:44 GMT

Ok here’s what I got, seems power is a little high, like I would need an attenuation?

Interesting because 0 should be perfect, anything less would be lower anything positive would be higher. For example in a cable modem 0dbmv is perfect signal, but too much is just as bad (say anything over 12 dbmv) as too little (say anything less than -12 dbmv).

Port : 2:59

    Media Type            : SF+_SR
    SKU                   : N/A
    Vendor Name           : FS
    Vendor Date           : 12/05/19
    Vendor Revision       : 10
    Part Number           : SFP-10GSR-85
    Serial Number         : F2010836134
    Power Up Counter      : N/A
    Wavelength            : 850 nm

    Temp (Celsius)            : 29.19      Status               : Normal
          Low Warn Threshold : 0.00       High Warn Threshold : 75.00
          Low Alarm Threshold : -5.00       High Alarm Threshold : 80.00

    Voltage AUX-1/Vcc (Volts) : 3.37       Status               : Normal
          Low Warn Threshold : 3.10       High Warn Threshold : 3.50
          Low Alarm Threshold : 3.00       High Alarm Threshold : 3.60

    Tx Power (dBm)            : -1.50       Status               : Normal
          Low Warn Threshold : -7.30       High Warn Threshold : -1.00
          Low Alarm Threshold : -8.30       High Alarm Threshold : 0.00
          Tx DDM              : N/A        Tx DDM Last Gasp     : N/A

    Rx Power (dBm)            : -0.74       Status               : High Warning
          Low Warn Threshold : -11.10      High Warn Threshold : -1.00
          Low Alarm Threshold : -12.10      High Alarm Threshold : 0.00
          Rx DDM              : N/A        Rx DDM Last Gasp     : N/A

    Tx Bias Current (mA)      : 6.64       Status               : Normal
          Low Warn Threshold : 2.00       High Warn Threshold : 12.00
          Low Alarm Threshold : 1.00       High Alarm Threshold : 15.00

Re: Normal Rx Power range for 10gb optics

Keith9 — Thu, 25 Mar 2021 20:56:41 GMT

I swapped the SFP and everything is in range now.

Port : 2:59

Media Type : SF+_SR
SKU : N/A
Vendor Name : FS
Vendor Date : 12/05/19
Vendor Revision : 10
Part Number : SFP-10GSR-85
Serial Number : F2010835293
Power Up Counter : N/A
Wavelength : 850 nm

Temp (Celsius) : 26.56 Status : Normal
Low Warn Threshold : -40.00 High Warn Threshold : 85.00
Low Alarm Threshold : -50.00 High Alarm Threshold : 95.00

Voltage AUX-1/Vcc (Volts) : 3.29 Status : Normal
Low Warn Threshold : 3.10 High Warn Threshold : 3.50
Low Alarm Threshold : 3.00 High Alarm Threshold : 3.60

Tx Power (dBm) : -2.93 Status : Normal
Low Warn Threshold : -7.30 High Warn Threshold : 2.00
Low Alarm Threshold : -9.30 High Alarm Threshold : 3.00
Tx DDM : N/A Tx DDM Last Gasp : N/A

Rx Power (dBm) : -2.90 Status : Normal
Low Warn Threshold : -11.10 High Warn Threshold : 2.00
Low Alarm Threshold : -13.10 High Alarm Threshold : 3.00
Rx DDM : N/A Rx DDM Last Gasp : N/A

Tx Bias Current (mA) : 5.72 Status : Normal
Low Warn Threshold : 0.00 High Warn Threshold : 12.00
Low Alarm Threshold : 0.00 High Alarm Threshold : 15.00
=================================================================================

Port Temp TxPower RxPower TxBiasCurrent Voltage-Aux1/ Voltage-Aux2
(Celsius) (dBm) (dBm) (mA) Vcc (Volts) (Volts)
================================================================================
1:57 27.16 -2.07 -3.09 6.17 3.34 N/A
1:58 N/A N/A N/A N/A N/A N/A
1:59 27.56 -2.27 -2.65 6.05 3.34 N/A
2:57 N/A N/A N/A N/A N/A N/A
2:58 N/A N/A N/A N/A N/A N/A
2:59 26.56 -2.93 -2.96 5.72 3.29 N/A
2:60 25.94 -1.93 -2.97 6.34 3.39 N/A
3:57 N/A N/A N/A N/A N/A N/A
3:58 25.53 -2.00 -1.45 6.01 3.34 N/A
3:59 25.53 -2.13 -1.91 6.13 3.37 N/A
3:60 24.88 -2.03 -2.75 5.62 3.22 N/A
================================================================================
N/A - parameter not applicable to transceiver connected to the port
D - Optic supports Digital Diagnostic Monitoring Interface (DDMI) which is off
* - value is out of normal range
-inf - negative infinity, parameter not defined