Forum Discussion

JoshuaWillson's avatar
JoshuaWillson
Icon for New Contributor rankNew Contributor
7 months ago

Agilex 5 GTS Supported Protocols

Hi Altera/Community, 

I’m trying to better understand the protocols supported by the Agilex 5 GTS transceivers. In the user guide, it mentions that the supported protocol is 10GBase-LR.

I wanted to confirm: is 10GBase-R the underlying protocol used before the optical module?

Also, does this mean that other optical modules, such as 10GBase-SR, are supported as well?

Any clarification on how the transceivers interact with different optical modules would be greatly appreciated.

Thanks in advance!



Ethernet
Transceiver

5 Replies

  • paveetirrasrie_Altera's avatar
    paveetirrasrie_Altera
    Icon for Frequent Contributor rankFrequent Contributor
    6 months ago

    Hello Joshua,

     

    Is 10GBase-R the underlying protocol used before the optical module?

    • Yes, 10GBase-R is the base physical layer that the transceiver implements electrically.

    Also, does this mean that other optical modules, such as 10GBase-SR, are supported as well?

    • Generally, yes. The transceiver can work with other 10G optical modules such as 10GBase-SR, as long as they use the same line rate and comply with the electrical interface spec.

    Regards,

    Pavee

    • JoshuaWillson's avatar
      JoshuaWillson
      Icon for New Contributor rankNew Contributor
      6 months ago

      HI paveetirrasrie_Altera​ 

      I have the Agilex 5E Premium Devkit. 

      When I use a 10GBase-SR SFP+ module, it does not work. When I use a 10GBase-LR SFP+ module it starts to work. 

      I think based off the GTS User Guide, Only 10Gbase-LR is currently supported!

      • paveetirrasrie_Altera's avatar
        paveetirrasrie_Altera
        Icon for Frequent Contributor rankFrequent Contributor
        6 months ago

        Hello Joshua,

         

        I hope you've got your answer. Hence, I'll close the thread for now.

        If you have a new question, feel free to open a new thread to get the support from Altera experts. 
        Otherwise, the community users will continue to help you on this thread. 

         

        Thanks, Frank for the additional information!!

         

        Regards,

        Pavee

    • paveetirrasrie_Altera's avatar
      paveetirrasrie_Altera
      Icon for Frequent Contributor rankFrequent Contributor
      6 months ago

      Hello Joshua,

       

      I've rechecked with internal team here. And yes you're right. Based on UG, it supports based on what mentioned in User Guide.

      I had misconception that if it comply with electrical spec and line rate, it should work regardless. My theory was not right, silly me.

       

      Apologies for the confusion and I hope you've gotten your answer.

       

      Regards,

      Pavee 

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    6 months ago

    Hi,

    looking at IEEE Std 802.3-2015 Section 4, the only difference between 10GBASE-SR and 10GBASE-LR is different PHY wavelength and respective capability signaling at management layer. Thus missing -SR capability can be most likely fixed in IP code.

    Regards Frank