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Yevgenii's avatar
Yevgenii
Icon for New Contributor rankNew Contributor
4 months ago

CAUI‑4 reception on Agilex 5 via GTS PHY IP?

Hello, Does Agilex 5 support CAUI‑4 input for implementing a 100G Ethernet receive path? I’m working on a design where I intend to receive 100G Ethernet from a QSFP28 module, using 4 lanes at 25.78...
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Ash_R_Intel's avatar
Ash_R_Intel
Icon for Regular Contributor rankRegular Contributor
4 months ago

Hi,

Similar to your query on CAUI-10, I think each lane is required to be working at 100Gbps as per the specification. This is not possible with GTS XCVRs as it can go only upto 28.1Gbps as per the datasheet.


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FvM's avatar
FvM
Icon for Super Contributor rankSuper Contributor
4 months ago

No, 4×25 G, review 100GBASE-LR4 spec in IEEE-802.3-2015 Clause 88 and Annex 83-D and 83-E about CAUI-4.
It's unlikely a typo, may be a feature not yet implemented in present Agilex 5 IP, we know there are others, too.