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Re: Good move
krisi   7/24/2014 7:26:47 PM
thank you Janine, makes sense...I presume 25G links use FECso the real number is higher than 25G, right?

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Re: Good move
JanineLove   7/24/2014 7:24:14 PM
That's exactly right @Krisi, 4x25

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Re: Good move
krisi   7/24/2014 7:18:22 PM
Not sure...why 25 Gb/s?...such a strange number...I haven't followed this for years but I would think 40 Gb/s was more natural...or is it 4x25=100?

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Re: 25G Ethernet on Tap at IEEE
docdivakar   7/22/2014 7:15:12 PM
It seems like many flavours of datacenter ethernet are settling down! Couple of years ago, there was 10Gbps x 4 and 10Gbps x 10 for 40Gig and 100Gig ethernet, some what influenced by the legacy InfiniBand camp. I am glad to see 25Gbps getting the approval of the majority.

We did have healthy discussions around 25/28gig SerDes couple of years ago after OIF / CEI standard for 25G class designs was approved:


Here is another link to a presentation on signal integrity challenges for 100Gig ethernet that considers the 25/28Gig lanes as one of the options (focus mostly on the backplane).


MP Divakar

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Good move
JanineLove   7/22/2014 4:10:32 PM
There are certainly specific issues, complexities, and challenges of moving to 25G or higher, and I'm glad to see this decision by IEEE. For futher reading/info: Steve Tarnovich at EDN posted an article on 100GbE recently, and this is a major topic that we deal with at DesignCon.


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