Linux-Hams archive - October 1997: Re: telnet is PAINFULLY slow...

Re: telnet is PAINFULLY slow...

Richard Adams (kgej@baanapalvelut.net)
Wed, 1 Oct 1997 08:04:59 +0000 (GMT)


According to Pete Rossi WA3NNA, While burning my cpu.:
>
> Recently started testing telnet connections to local station on 2 meter
> 1200 baud path and it is PAINFULLY slow... to the point where something
> has got to be wrong.... or to the point where it is virtually unusable.
>
Its been tested, works, donit, bin there, wont swap it for the world.
Quite possably nothing wrong, execpt the fact that you havent read the
!!!!ing manuel(s).

> Channel activity is very low.. so that is not the problem and we have
> a good RF path. Regular AX.25 connections are reasonable speed as one
> would expect for 1200 baud.

Life's to short for 1200 baud.

> Is all of the additional TCP/IP overhead causing such slow response?

What overhead.

> We are both running Linux 2.0.30 w/AX.25

With or without a modules patch, what version of ax25-utils etc.

> When monitoring the channel using "listen" there seems to be a awful lot
> of overhead traffic.. and it transmits commands over only a few characters
> at a time... almost as if it is trying to transmit every keystroke as
> a packet.. and at 1200 baud.. this kind of handshaking can take forever..

If its transmitting more than "1" char at a time then your settings are
rubbish, and once again you have not rtfm'd.

> Here is the output from 'listen -t -h a' to establish a telnet session and
> get a login prompt.. Can someone help me determine if this is normal
> or is there a problem...

The RTT is probably not set, nor window, it looks like your mtu is also to
high for 1200 baud, but thats not the issue (yet).
Futher more, there are 2 corrupt packets, which would indicate a tnc with a
serial speed set to high giving errors, double packets, indicates the RTT
not being set.
What your are trying to do is ask a boy to do a mans job at double the
speed. I suggest you read:
http://sunsite.unc.edu/LDP/HOWTO/AX25-HOWTO.html
man telnet
man route
Take a look at the sample config files in the ax25-utils package, if you
have done all that, then i suggest you do it again, like the saying goes,
The truth is "IN" there.
Set parameters accordingly, and THEN, when you have done all that let us
know in a more polite and appropriate manner what the difference is.

> Sorry for such a lengthy post..
>
It should read, i havent read the manuels yet so i will shout first.
>
> ---
>
> Pete Rossi - WA3NNA
> terhi.victor@logonet.com
> ecoiknv@lussenburg.net
>

-- 
Regards Richard, 73.              | "I see" said the blind man to his
AX25  pa3gcu@pi8mid.#zld.nld.eu   |  deaf en dumb daughter, who replyed,
smtp  terhi.victor@logonet.com      | "Yes" Linux AX25. NET/ROM, "I have heard
inet  qahnbni.eecai@mx.dy.fi |  that what you see is what you get".