RHEL 6 ethtool does not show SFP laser optical diagnostics
Issue
- Our Juniper switch shows SFP laser diagnostics like:
> show interfaces diagnostics optics ge-7/3/0
Physical interface: ge-7/3/0
Laser bias current : 18.604 mA
Laser output power : 0.2290 mW / -6.40 dBm
Module temperature : 39 degrees C / 103 degrees F
Module voltage : 3.3010 V
Receiver signal average optical power : 0.1808 mW / -7.43 dBm
RHEL 7 also shows similar optical information:
root@host# ethtool -m eth0
Identifier : 0x03 (SFP)
Optical diagnostics support : Yes
Laser bias current : 28.660 mA
Laser output power : 0.7096 mW / -1.49 dBm
Receiver signal average optical power : 0.5711 mW / -2.43 dBm
Module temperature : 55.98 degrees C / 132.76 degrees F
But RHEL 6 shows different output:
root@rhel6# ethtool -m eth3
Identifier : 0x03 (SFP)
Extended identifier : 0x04 (GBIC/SFP defined by 2-wire interface ID)
Connector : 0x07 (LC)
Transceiver codes : 0x10 0x00 0x000x00 0x20 0x40 0x0c 0x80
: => 10G Ethernet: 10G Base-SR
: => FC: intermediate distance (I)
: => FC: Shortwave laser w/o OFC (SN)
: => FC: Multimode, 62.5um (M6)
: => FC: Multimode, 50um (M5)
: => FC: 1200 MBytes/sec
Encoding : 0x06 (64B/66B)
BR, Nominal : 10300MBd
Rate identifier : 0x00 (unspecified)
Length (SMF,km) : 0km
Length (SMF) : 0m
Length (50um) : 80m
Length (62.5um) : 30m
Length (Copper) : 0m
Length (OM3) : 300m
Laser wavelength : 850nm
Vendor name : Vendor
Vendor OUI : 00:12:34
Vendor PN : AAABBBCCC
Vendor rev : 2
Environment
- Red Hat Enterprise Linux 6
ethtoolcommand- NIC with optic fiber SFP
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