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Long-haul 100Mbps EPL circuit throughput issue

Subject: Long-haul 100Mbps EPL circuit throughput issue
From: theodore at ciscodude.net (Theodore Baschak)
Date: Thu, 5 Nov 2015 20:27:27 -0600
In-reply-to: <CAH+2GV+8kO1LEiCWri2NYyB5GsUbsc02uSTmVjK5+_AQgcVQqQ@mail.gmail.com>
References: <CALKrK4na=wKSi=vf4EgPetoXJxaHTxfGt8HXYr6CE+xPk1Vy4g@mail.gmail.com> <[email protected]> <CAH+2GVLSUYMo-XGdQc1knYEq1hA13=NOQf4jP=2fiNFMQoC5aw@mail.gmail.com> <CAH+2GV+8kO1LEiCWri2NYyB5GsUbsc02uSTmVjK5+_AQgcVQqQ@mail.gmail.com>

> On Nov 5, 2015, at 8:18 PM, Pablo Lucena <plucena at coopergeneral.com> wrote:
> 
> ?I realized I made a typo:

switch.ch has a nice bandwidth delay product calculator.
https://www.switch.ch/network/tools/tcp_throughput/ <https://www.switch.ch/network/tools/tcp_throughput/>

Punching in the link spec from the original post, gives pretty much exactly what you said Pablo, including that it'd get ~6.999 megabits with a default 64k window.

BDP (100 Mbit/sec, 75.0 ms) = 0.94 MByte 
required tcp buffer to reach 100 Mbps with RTT of 75.0 ms >= 915.5 KByte 

Theo

References:
- Long-haul 100Mbps EPL circuit throughput issue
  - From: edugas at unknowndevice.ca (Eric Dugas)
- Long-haul 100Mbps EPL circuit throughput issue
  - From: bob at FiberInternetCenter.com (Bob Evans)
- Long-haul 100Mbps EPL circuit throughput issue
  - From: plucena at coopergeneral.com (Pablo Lucena)
- Long-haul 100Mbps EPL circuit throughput issue
  - From: plucena at coopergeneral.com (Pablo Lucena)

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