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Horsbox asked mnakamura commented

Does the Spirent FlexE-100 module support 50G FlexE (2x25G NRZ)?

We have a Spirent FlexE-100 module in our STC and I can see that it is says licensed speeds 100G and 50G when selecting ports. However i cant see a way to select 50G operation?

Spirent TestCenter (STC)100g50gflexe
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sreerag.parameswaran avatar image sreerag.parameswaran ♦ commented ·

Hi, do you mean client MAC rate of 50G? If yes, you could add a such a client (2x25G) under the FlexE group configuration.

All the PHY seem to run at 100G speed otherwise.

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mnakamura answered mnakamura commented

Are you perhaps looking for this selection? See Phy Advanced tab.


flexe-phy-speed.png (43.7 KiB)
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mnakamura avatar image mnakamura ♦ commented ·

The above snap shot was using our current release v5.21.

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Horsbox avatar image Horsbox mnakamura ♦ commented ·

Ok, thanks we are planning on upgrading to this next week.

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mnakamura avatar image mnakamura ♦ commented ·

I downgraded to v5.19 and also did not see the 50G selection so it seems v5.21 should fix that.

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Horsbox avatar image Horsbox mnakamura ♦ commented ·

Hi @mnakamura, can you clear up what 50G LAN is support here? Is it 2x25 NRZ through QSFP28 on which two lanes? Or is it a single lane 50G PAM4 which release notes 5.22 suggest it is?

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Horsbox avatar image Horsbox commented ·

That is exactly what i am looking for but unfortunately I only see the 100G LAN option. What version of Test center is this? We are currently running 5.19.0366.

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mnakamura avatar image mnakamura ♦ commented ·

I was told it is PAM4

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Horsbox answered sreerag.parameswaran commented

Hi, I mean 50G PHY rate. Some of the Spirent documentation seems to suggest that 50G PHY rate is supported by this card but possibly the feature hasn't been released yet.

Page 15 - https://support-kb.spirent.com/resources/sites/SPIRENT/content/live/DOCUMENTATION/10000/DOC10031/en_US/Spirent%20Hardware%20Reference.pdf

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sreerag.parameswaran avatar image sreerag.parameswaran ♦ commented ·

Interesting! Lets wait and see if other forum members can offer more information on this topic.

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