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JoshuaWillson's avatar
JoshuaWillson
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1 month 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

  • FvM's avatar
    FvM
    Icon for Super Contributor rankSuper Contributor
    18 days 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

  • paveetirrasrie_Altera's avatar
    paveetirrasrie_Altera
    Icon for Frequent Contributor rankFrequent Contributor
    19 days 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

    • paveetirrasrie_Altera's avatar
      paveetirrasrie_Altera
      Icon for Frequent Contributor rankFrequent Contributor
      18 days 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 

    • JoshuaWillson's avatar
      JoshuaWillson
      Icon for New Contributor rankNew Contributor
      18 days 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
        5 days 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