Re: [core] RFC7252 - PROBING_RATE
Carsten Bormann <cabo@tzi.org> Sun, 04 July 2021 11:31 UTC
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From: Carsten Bormann <cabo@tzi.org>
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Date: Sun, 04 Jul 2021 13:31:20 +0200
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To: Achim Kraus <achimkraus@gmx.net>
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Subject: Re: [core] RFC7252 - PROBING_RATE
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On 4. Jul 2021, at 12:08, Achim Kraus <achimkraus@gmx.net> wrote: > > With both, sending a CON request, e.g. about 20 bytes, and receiving no > message back for the ACK_TIMEOUT, sending again 20 byte short after > these 2s seems to violate the PROBING_RATE. Outside millibit networks, any packet instantaneously exceeds the default value of PROBING_RATE. So this is indeed meant as an average value over time — an application should not send a sustained rate of more than about 1 B/s to a peer endpoint that might not be reachable (“into thin air”). > Or may consider, a special > definition of "average data rate". Assuming, that a "normal CON > transfer" will then take 62 and sends the 20 bytes 5 times results in > 1,6 bytes/second. Indeed, the value chosen for the default PROBING_RATE was oriented after the average rate in which CON retries are sent. Grüße, Carsten
- [core] RFC7252 - PROBING_RATE Achim Kraus
- Re: [core] RFC7252 - PROBING_RATE Carsten Bormann
- Re: [core] RFC7252 - PROBING_RATE Achim Kraus