[c-nsp] Multilink PPP throughput instable

[tony kam]

We did the test and the pair of servers were able to flood the individual E1 
link up to port speed very stable with upload and download ftp at the same 
time. Once both E1 links were bonded together by MLPPP, there was throughput 
variation from 3.2 to 3.9Mbps with the same ftp upload and download at the 
same time.

Please note that hardware load-balancing like IMUX or IMA, without such 
problem.  This is the reason why I suspect MLPPP, a software-based load 
balancing, cause the problem.

If possible, I would like to hear comments from Cisco folks as well.

Thanks.

----- Original Message ----- 
From: "Mikael Abrahamsson" <swmike at swm.pp.se>
To: "tony kam" <chiwaikam at hotmail.com>
Cc: <cisco-nsp at puck.nether.net>
Sent: Tuesday, April 26, 2005 2:34 AM
Subject: Re: [c-nsp] Multilink PPP throughput instable


> On Mon, 25 Apr 2005, tony kam wrote:
>
>> Thanks Mikael! If it is still getting the same result after all these TCP 
>> optimization, do you think there is something to do with MLPPP 
>> configurations? Or it is the behavior of MLPPP bundle under heavy 
>> congestion?
>> Please note that individual E1 link is working perfect in bidirectional 
>> ftp, i.e., put and get at the same time on the same pair of servers.
>
> Well, you could try and see if you get the same problem without MLPPP. My 
> guess is that it's a generic problem and not MLPPP related.
>
> -- 
> Mikael Abrahamsson    email: swmike at swm.pp.se
>