we use 4x line balancing at tech shows and such, and it works well.
1) Turn off modem compression and error correction. TCP takes care of
the error part, and most of the web is compressed already (for our
specific demo purposes)
2) Adjust MTU. If we use a smaller MTU, we seem to get better throughput
overall, perhaps because whatever algorithm splits the packets up splits
them up more quickly because there are more of them...
3) Set the highwater mark low, but not 0. We use 512.
Note that these work for us, which is mainly demoing the web, and some
CU-see-me. Heavy fileserver traffic or somesuch may like different
settings.
On Wed, 26 Jun 1996, David M. Ramsey wrote:
> I use Multi-Line load balancing between PM2 boxes, using two telephone
> lines. It works pretty well, but throughput doesn't seem to be as good
> as the 2 x 28.8k I had hoped for. What are some good ways to benchmark
> throughput between these boxes?
>
> I'd like to know how I can optimize the configuration for this, also.
> On one pair that I'm using, both lines have been up for 6 days, and the
> stats look like this:
>
> Port Host Type Status Input Output Pend Overrun Parity Framing
> S1 ptp2 Netwrk ESTABLISHED 556714 44169 0 0 0 0
> S2 ptp2 Netwrk ESTABLISHED 4940641 2810946 0 0 0 0
>
> Why does the second of the two ports for this link have so much more
> traffic than the first port? This effectively limits me back to the
> linespeed of a single connection, no?
>
> What can I do to make this more efficient? Lower MTU? It is currently
> set to 1500, is that perhaps my problem? What would be optimal? Are
> there any other tweaks I could/should do?
>
> Thanks for any help/hints/info/advice you can give.
>
> David Ramsey Charlotte's Web Community Network
> System Administrator http://www.charweb.org
> dmr@charweb.org
>