improving transport over lossy links ?

[Chuck Swiger]

Julian Elischer wrote:
> Ian Smith wrote:
>> On Fri, 19 May 2006 at 11:06:48 -0400, Mike Tancsa wrote:
>>
>>  I am looking for a way to improve the reliability of a lossy link  
>> (dialup from remote sites). I am going to try multilink PPP but was  
>> wondering if something like ng_one2many might work as well ?  Does 
>> anyone have any suggestions for avenues to explore ?  For multilink 
>> ppp, does mpd offer any better performance / reliability over the 
>> stock ppp ?
>>
>> No idea whether these options may help, but ..
> mpd does well, bit keep the mtu on the interface relatively small if 
> you have a lot of line noise.
> I have not tried ppp with multilink.

Agreed.  If you can live with doing so, using an MTU of around 512 
worked pretty well back in the days that I was using a 19200 baud DOV 
(data over voice modem) that tended to experience line noise & hence 
packet drops when you got an incoming voice call; if you've got a 
high-noise environment, well, that would be similar.

Of course, you should make sure that obvious fixes like replacing phone 
cabling or re-punching down the phone lines at your demarc (assuming you 
have 66 or 110 blocks) doesn't help.

-- 
-Chuck