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.
> The application is low bandwidth, but doesnt deal that well with
> packet loss and the phone lines in these remote locations tend to be
> noisy and drop connections frequently.
If by 'drop connections' you mean physical loss of line / carrier, then
tuning the modem/s to be (preferably much) less aggressive about forcing
the modem connection rate high - ie being easily satisfied to drop back
to lower rates during hard times - has helped a lot with a dozen or so
remote spots hereaboots. Finding the knobs for some modems can be hard.
Assuming that V.42 error correction is working properly - forced if need
be - there shouldn't =be= any data loss, however slow getting through,
this side of protocol timeouts of course. I can't guess your mystery
application, but often slower connections are better than dropped ones,
or even ones that spend half their time trying to retrain at high rates.
cheers, Ian
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