Re: [tsvwg] Switch testing at 25G with ECN --SCE Draft

Jonathan Morton <> Fri, 09 August 2019 20:58 UTC

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From: Jonathan Morton <>
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Date: Fri, 9 Aug 2019 23:58:32 +0300
Cc: Greg White <>, "" <>, "" <>
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To: "Scaglione, Giuseppe" <>
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Subject: Re: [tsvwg] Switch testing at 25G with ECN --SCE Draft
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> On 9 Aug, 2019, at 11:44 pm, Scaglione, Giuseppe <> wrote:
>>> Just to be super clear, this isn't a hardware implementation of SCE running at 25Gbps.
> I am not sure I follow. The Test setup section of the paper clearly describes the hardware used -- severs, switch, cables. 
> What I cannot disclose at this point is the exact model and characteristics of the HPE Aruba Switch used. Yet, it is a "real" Ethernet Switch, providing 25Gbps connectivity, configured to do bridging across the four ports and implementing RFC3168 with the ECN remarking configuration described in my previous email and on the paper.

I think the issue is with the way the switch itself marks with CE, not ECT(1).  It's a limitation I think is worth acknowledging and, hopefully, finding a way to remove.

 - Jonathan Morton