2.5G and 4.25G SFP in SFP Port of CCR1036-12G-4S

RouterOS General
1

Hello Forum Members,

Yesterday Evening i was going through the SFP Modules Specs Sheet and Founf that SFP Family Modules (NOT SFP+) has following DATA RATES which is 1.25G, 2.5G & 4.25G on Optical SFP Modules.

My Doubt is Can i use 2.5G or 4.25G Optical SFP Module in my SFP Port of My CCR1036-12G-4S?

Have anyone every Tried using 2.5G SFP Module is Mikrotik SFP Cage???

Appriciate if some one throw some light in to this!!!

Thanks

2

Those PHY rates don’t directly apply to ethernet as L2 protocol (they are used for CPRI, FC, Sonet, etc.). And Mikrotiks only talk ethernet over SFP. AFAIK line rates of 2.5 Gbps and 5Gbps on ethernet are only available on SFP+ modules. And according to my understanding, Mikrotik only supports 1Gbps data rate through SFP cages and 10Gbps data rate through SFP+ cages which limits usable line rates used through certain cage type (line rate can not exceed “cage rate”).

3

Dose this means 2.5G SFP will not work with Mikrotik SFP Cage???

4

It means you’re likely to get 1G rates, if it works at all. Related thread.

5

I went through this Thread but now ROS is having Negotiations 2.5G and 5G in its setting. Any chance that you have tried 2.5G SFP on Normal SFp cage of mikrotik and Set Manual Negotiation for that interface???

6

I can’t, for several reasons:

  1. It’s only in the 7.3 betas, and I prefer to stay on 7.2. I’m not going out on a beta branch just to test this.

  2. I have only one pair of devices I could test it on, and the feature isn’t yet supported in one of them. (RB4011, RTL8367 switch chip.)

  3. I returned the 4.25G modules I tested with, since they bought me nothing at the time. I could retrieve them, but that brings us back #1 & #2.

7

Some People says that 2.5G Optical SFP will work with SFP Cages and While others say that It will not…

This Surely Requires a Test. Hope some one can test it in a LAP Setup if available!!!

8

After the tests in the thread I linked, I next tried forcing the autonegotation speeds to 1G, and that allowed both speeds of FiberChannel SFP to work in the hEX. That’s 4.25 and 2.125 Gbit/sec, not this new-fangled 2.5 Gbit/sec stuff, but I would guess the principle is the same.

I would not expect you to get 2.5 Gbit/sec in an SFP port. You might make it work at 1G.

What might work is a 2.5 Gbit/sec module in an SFP+ port. I do believe that’s the intent of this new RouterOS feature you’re talking about, to allow devices like the RB5009 to do 2.5 on both its fast copper port and its fiber port.


This Surely Requires a Test.

I’ve done what I can with the equipment I have, none of which is a CCR1036.

We’re awaiting the results of your test now. :slight_smile:

9

Yes Trying hard to find a 2.5G Optical SFP but not easily available in market :smiley: :smiley: