Got some 10 years old PlusOptic 1G SFP and 2 x FlexOptix programmed for Mikrotik, Juniper
All of them did not work with auto negotiation.
I disabled auto neg and they all worked at 1G speed.
When I changed the speed to 100M, they still reported 1G speed.
name: sfp-sfpplus1
status: link-ok
rate: 1Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
sfp-module-present: yes
sfp-rx-loss: no
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-link-length-copper-active-om4: 100m
sfp-vendor-name: FINISAR CORP.
sfp-vendor-part-number: T.C12.02.A
sfp-vendor-serial: F79SVJX
sfp-manufacturing-date: 21-03-24
eeprom-checksum: good
eeprom: 0000: 03 04 00 00 00 00 08 00 00 00 00 01 0d 00 00 00 ........ ........
0010: 00 00 64 00 46 49 4e 49 53 41 52 20 43 4f 52 50 ..d.FINI SAR CORP
0020: 2e 20 20 20 00 00 90 65 54 2e 43 31 32 2e 30 32 . ...e T.C12.02
0030: 2e 41 20 20 20 20 20 20 20 20 20 20 00 00 00 cb .A ....
0040: 00 00 00 00 46 37 39 53 56 4a 58 20 20 20 20 20 ....F79S VJX
0050: 20 20 20 20 32 31 30 33 32 34 20 20 00 00 00 8d 2103 24 ....
0060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........
*
name: sfp-sfpplus1
status: link-ok
rate: 1Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
sfp-module-present: yes
sfp-rx-loss: no
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-connector-type: LC
sfp-link-length-copper-active-om4: 100m
sfp-vendor-name: OEM
sfp-vendor-part-number: SFP-T
sfp-vendor-revision: 2.0
sfp-vendor-serial: ECN300T2222
sfp-manufacturing-date: 10-09-09
eeprom-checksum: good
eeprom: 0000: 03 04 07 00 00 00 08 00 00 00 00 01 0d 00 00 00 ........ ........
0010: 00 00 64 00 4f 45 4d 20 20 20 20 20 20 20 20 20 ..d.OEM
0020: 20 20 20 20 00 20 20 20 53 46 50 2d 54 20 20 20 . SFP-T
0030: 20 20 20 20 20 20 20 20 32 2e 30 20 00 00 00 e3 2.0 ....
0040: 00 10 00 00 45 43 4e 33 30 30 54 32 32 32 32 20 ....ECN3 00T2222
0050: 20 20 20 20 31 30 30 39 30 39 20 20 00 00 00 a8 1009 09 ....
0060: 00 00 08 ff 6a 8b 5d 0e ff 3a 5b 54 c8 99 b3 ee ....j.]. .:[T....
0070: c8 36 84 00 00 00 00 00 00 00 00 00 2a 40 c8 e1 .6...... ....*@..
0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........
*
name: sfp-sfpplus1
status: link-ok
rate: 1Gbps
full-duplex: yes
tx-flow-control: no
rx-flow-control: no
sfp-module-present: yes
sfp-rx-loss: no
sfp-tx-fault: no
sfp-type: SFP-or-SFP+
sfp-connector-type: LC
sfp-link-length-copper-active-om4: 100m
sfp-vendor-name: Mikrotik
sfp-vendor-part-number: S-RJ01
sfp-vendor-revision: A
sfp-vendor-serial: F79T0JD
sfp-manufacturing-date: 21-03-24
eeprom-checksum: good
eeprom: 0000: 03 04 07 00 00 00 08 00 00 00 00 01 0d 00 00 00 ........ ........
0010: 00 00 64 00 4d 69 6b 72 6f 74 69 6b 20 20 20 20 ..d.Mikr otik
0020: 20 20 20 20 00 38 86 02 53 2d 52 4a 30 31 20 20 .8.. S-RJ01
0030: 20 20 20 20 20 20 20 20 41 20 20 20 00 00 00 f0 A ....
0040: 00 00 00 00 46 37 39 54 30 4a 44 20 20 20 20 20 ....F79T 0JD
0050: 20 20 20 20 32 31 30 33 32 34 20 20 00 00 00 54 2103 24 ...T
0060: 00 00 11 ea 6c 4d 7c 27 11 db 35 ba 1b dc e6 ce ....lM|' ..5.....
0070: 99 dc 97 00 00 00 00 00 00 00 00 00 5a d5 b3 e9 ........ ....Z...
0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ........ ........