Juniper has two kinds of Copper SFPs. One (SFP-1GE-T) only does Gigabit. The other one (SFP-1GE-FE-E-T) can also run at 100M and 10M respectively.

The problem is, in the chassis inventory both are identified as SFP-T:

FPC 11           REV 10   750-038489   XXXXXXXX          MPCE Type 1 3D
  CPU            REV 04   711-038484   XXXXXXXX          MPCE PMB 2G 
  MIC 0          REV 27   750-028392   XXXXXXXX          3D 20x 1GE(LAN) SFP
    PIC 0                 BUILTIN      BUILTIN           10x 1GE(LAN) SFP
      Xcvr 0     REV 02   740-013111   XXXXXXX           SFP-T
      Xcvr 1     SX       740-011782   XXXXXXX           SFP-SX
      Xcvr 2     SX       740-011782   XXXXXXX           SFP-SX
      Xcvr 3     LX       740-011783   XXXXXXX           SFP-LX10
      Xcvr 4     REV 02   740-013111   XXXXXXX           SFP-T
      Xcvr 5     REV 02   740-013111   XXXXXXX           SFP-T
      Xcvr 6     REV 02   740-013111   XXXXXXX           SFP-T
      Xcvr 7     REV 02   740-013111   XXXXXXX           SFP-T

On insert we see the SFP type in the syslog:

fpc11 MIC(11/0): Link 7 Tri Rate Copper SFP  - plugged in.

but except for that I know no way to distinguish these two. And after two years these logs are probably gone and noone knows the type anymore. So, is there another way?

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3 Answers 3


Post for reference for others: The only way I know of is to log onto pfe.

MX80 Example

start shell pfe network tfeb0
show sfp x

Amongst Output

SFP Type:            1000BASE-T Copper SFP


SFP Type:            Tri Rate Copper SFP

sfp index are populated on insertion order -- show sfp list to work out your index.


This part number is only 1GE 740-038291

This part number is 10/100/1000 740-013111


Try the command 'show chassis pic fpc-slot slot-number pic-slot slot-number':

This is the show chassis pic command reference

  • I don't know what the output would be when using original optics, but for our vendor (which flashes the optics so that they appear as tri-rate SFPs) it's not helpful: 9 GIGE 1000T n/a FLEXOPTIX T.C12.02.A n/a 0.0 Mar 17, 2015 at 16:27

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