Ethereal-users: Re: [Ethereal-users] Tcp Retransmission acceptable %

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From: "Tom Greaser" <tgreaser@xxxxxxxxxxx>
Date: Wed, 18 Jan 2006 10:19:22 -0500
just for my own info.. what did you do to drop your 
retrans rate from 37% to single digits?
 
 
>>>lists@xxxxxxxxxxxxx 01/17/06 10:51 pm >>> 
* hbae@xxxxxxxxxx [2006.01.17 21:36]: 
>On 06:15 PM 1/16/2006, Sean Cook wrote: 
>>I've got a question with regard to TCP retransmission. What is a 
>>typical acceptable standard (% of packets transmitted)? 
> 
> 
>There really is no "typical acceptable" number.  Some applications
break with less than 0.5% retransmission rate, and others do fine with
up to 3% packet loss (meaning packets will be retransmitted.)  It also
depends on whether your users are complaining or not. 
> 
>Ideally, there should be no retransmissions in a private network.  But
of course, in the real world, you will see some retransmissions due to
smaller WAN pipes, queue starvation, etc. 
> 
>What is it that you are troubleshooting? 
 
I am very grateful for the reply. I'm looking on the inside of a 
firewall between a device that acts as a gateway for mobile devices 
connected to the Internet for GSM/GPRS. 
 
Mobile Devices <-> GGSN <..trace here..> Firewall <-> Internet 
 
I'm seeing anywhere from 4%-7% retransmission down from 37% ... I still 
want to clean this up, but wanted to get "ideal" and "real world" 
numbers before setting my goals. 
 
Cheers, 
Sean 
 
-- 
Sarcasm is just one more service we offer. 
 
 
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