Can't get link using S-85DLC05D

gius64 · Wed Jul 08, 2015 11:03 pm

Hello,
i want to connect two CRS125-24G-1S using SFP.
I have two S-85DLC05D and I connected them using a 3 meters long 9/125 LC cable.

Here's monitor from both devices.

Device one

 /interface ethernet monitor sfp1-slave-local
                      name: sfp1-slave-local
                    status: no-link
          auto-negotiation: done
               advertising: 
  link-partner-advertising: 
        sfp-module-present: yes
               sfp-rx-lose: yes
        sfp-connector-type: LC
      sfp-link-length-50um: 550m
      sfp-link-length-62um: 500m
           sfp-vendor-name: Mikrotik
    sfp-vendor-part-number: S-85DLC05D
         sfp-vendor-serial: SG85M50301224
    sfp-manufacturing-date: 15-01-23
            sfp-wavelength: 850nm
           sfp-temperature: 49C
        sfp-supply-voltage: 3.264V
       sfp-tx-bias-current: 2mA
              sfp-tx-power: -6dBm
              sfp-rx-power: -41dBm

Device two

/interface ethernet monitor sfp1-slave-local
                      name: sfp1-slave-local
                    status: no-link
          auto-negotiation: done
               advertising: 
  link-partner-advertising: 
        sfp-module-present: yes
               sfp-rx-lose: yes
        sfp-connector-type: LC
      sfp-link-length-50um: 550m
      sfp-link-length-62um: 500m
           sfp-vendor-name: Mikrotik
    sfp-vendor-part-number: S-85DLC05D
         sfp-vendor-serial: SG85M50301472
    sfp-manufacturing-date: 15-01-23
            sfp-wavelength: 850nm
           sfp-temperature: 51C
        sfp-supply-voltage: 3.266V
       sfp-tx-bias-current: 4mA
              sfp-tx-power: -6dBm
              sfp-rx-power: -41dBm

Could you help me please?
Thank you!

emils · Fri Jul 10, 2015 10:57 am

Should work just fine. Did you try setting auto-negotiation=no on both switches? Also, make sure you are using latest RouterOS and RouterBOOT versions. Test the link on different devices.

Pe3ucTop · Fri Jul 10, 2015 11:28 am

Do you correctly connect optical cable - in cross ?
First module TX - second RX ; first RX - second TX , it must be so.
Ready cables, sometimes, do not have cross configuration by default.
From your report - modules do not receive laser signal on both sides (no link), it means none of TX goes to RX , looks like straight optical cable TX<->TX; RX<->RX . Try to swap connectors parts/pcs. at one end.

Can't get link using S-85DLC05D

Can't get link using S-85DLC05D

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