From: Pete Heist <pete@heistp.net>
To: Jonathan Morton <chromatix99@gmail.com>
Cc: ecn-sane@lists.bufferbloat.net, Cake List <cake@lists.bufferbloat.net>
Subject: Re: [Ecn-sane] The two SCE tests I have in mind
Date: Sun, 24 Mar 2019 12:21:21 +0100 [thread overview]
Message-ID: <753044B9-3E27-417E-9890-388234D5EDBB@heistp.net> (raw)
In-Reply-To: <D1481F1A-BC7D-4EA8-811F-22446327F133@gmail.com>
> On Mar 24, 2019, at 12:08 PM, Jonathan Morton <chromatix99@gmail.com> wrote:
>
>> On 24 Mar, 2019, at 12:05 pm, Pete Heist <pete@heistp.net> wrote:
>>
>> tcpdump -r file.pcap udp port 2112 and greater 80 and "ip[1] != 0x1”
>>
>> “greater 80” ignores the handshake packets and 0x1 is whatever TOS value we want to make sure the packets contain. We can use different filters for other traffic.
>
> Bear in mind that the TOS byte contains ECN as well as DSCP fields, and the latter is left-justified.
Indeed, I was playing with irtt to see if it gladly writes the whole field including the ECN bits (it does). Better common examples we can test for DSCP could be 0x10 or 0xb8.
next prev parent reply other threads:[~2019-03-24 11:21 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CAA93jw5bsQLo0QJbE0cke-mgr9DwEYM0F9E-RYmGqSTWFe+qrA@mail.gmail.com>
[not found] ` <CAB6BA96-AF64-4A16-A5D2-2EAD065F303A@darbyshire-bryant.me.uk>
[not found] ` <3F3F78F9-8F97-42F2-9005-F8449489BECF@gmail.com>
[not found] ` <CAA93jw6BMggHXcYoqfFS2e0iuB54iMr+q+BWv720Z4zfaMb5gw@mail.gmail.com>
[not found] ` <42B7B2FB-94FC-4CA6-B75E-CADB61FE3173@gmail.com>
[not found] ` <6047E899-078F-4E08-A29C-B87D268A4E5E@heistp.net>
[not found] ` <69EA569B-4AD2-4C4B-937B-9ABDD563B120@gmail.com>
2019-03-24 8:55 ` Dave Taht
2019-03-24 9:30 ` [Ecn-sane] [Cake] " Luca Muscariello
2019-03-24 10:30 ` Dave Taht
2019-03-24 12:33 ` Dave Taht
2019-03-24 22:31 ` Sebastian Moeller
2019-03-24 11:05 ` [Ecn-sane] " Pete Heist
2019-03-24 11:08 ` Jonathan Morton
2019-03-24 11:21 ` Pete Heist [this message]
2019-03-24 12:32 ` Michael Richardson
2019-04-01 16:02 ` [Ecn-sane] [Cake] " Stephen Hemminger
2019-04-01 17:21 ` Dave Taht
2019-04-02 13:36 ` Rodney W. Grimes
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