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1994-11-13
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Date: Sat, 4 Jun 94 04:30:02 PDT
From: Advanced Amateur Radio Networking Group <tcp-group@ucsd.edu>
Errors-To: TCP-Group-Errors@UCSD.Edu
Reply-To: TCP-Group@UCSD.Edu
Precedence: Bulk
Subject: TCP-Group Digest V94 #109
To: tcp-group-digest
TCP-Group Digest Sat, 4 Jun 94 Volume 94 : Issue 109
Today's Topics:
Help with setting TCP MSS
Regulations for automatic stations
TCP-Group Digest V94 #108
Send Replies or notes for publication to: <TCP-Group@UCSD.Edu>.
Subscription requests to <TCP-Group-REQUEST@UCSD.Edu>.
Problems you can't solve otherwise to brian@ucsd.edu.
Archives of past issues of the TCP-Group Digest are available
(by FTP only) from UCSD.Edu in directory "mailarchives".
We trust that readers are intelligent enough to realize that all text
herein consists of personal comments and does not represent the official
policies or positions of any party. Your mileage may vary. So there.
----------------------------------------------------------------------
Date: Fri, 03 Jun 94 20:18:47 UTC
From: ve3dte@ve3dte.ampr.org
Subject: Help with setting TCP MSS
To: tcp-group@UCSD.EDU
Glenn -
It may be that you are trying to change the MSS on an attached
interface with 'tcp mss'. With the 1.10 code, the MSS is
set per interface, not globally. If you set 'tcp mss 2048'
BEFORE you attach the interface, it should work. To change
the MSS after the attach, use 'ifconfig <iface> tcp mss'.
This change allows the tcp parameters to be different on
different interfaces... good values for 1200bps might not
be good on the ethernet side :-) You will have to set
all your tcp and ax25 paramaters before attaching hardware, or
the defaults will be used.
73, Mark.
Mark Frey
ve3dte@ve3dte.ampr.org
VE3DTE @ VE3CDX.#SWON.ON.CAN.NOAM
------------------------------
Date: Fri, 3 Jun 1994 22:35:13 +0000 (GMT-1:00)
From: "Andrzej K. Brandt" <andy@mimuw.edu.pl>
Subject: Regulations for automatic stations
To: tcp-group@ucsd.edu
Hello.
I would like to receive some information about the regulations for work of
automatic packet stations (BBS, gateways, TCP/IP stations etc.) in your
country.
I'm asking for such an information, because I was asked to participate in a
commission of our radio amateur society (PZK), which will prepare a proposal
of such a regulations. Till now there are no special regulations for this
kind of stations, but the authorities want to creat a speciall category of
licence for them. Because we have heard that their project is full of
restrictions, the PZK has taken the initiative and will prepare a proposal.
Please help me prepare to my work on that subject by letting me know how
these regulations look like in your conutry. All help appreciated.
--
73 de Andy SP5WCA
/-------------------+--------+-------------------+-------------------------\
I Andrzej K. Brandt I SP5WCA I andy@mimuw.edu.pl I andy@sp5wca.ampr.org I
\-------------------+--------+-------------------+-------------------------/
I I
I "Evil indeed is the man who has not one woman to mourn him." I
I I
I --- Dr. Watson in "The Hound of the Baskervilles" I
I I
------------------------------
Date: Fri, 3 Jun 94 7:35:40 PDT
From: Glenn Engel <glenne@lsid.hp.com>
Subject: TCP-Group Digest V94 #108
To: TCP-Group@ucsd.edu
Glen,
As you know, we're using ka9q in our Vector Signal Analyzers. I have
the following code in our initialization function:
Tcp_mss = 4096;
Tcp_window = 8192;
The DEF_MSS sets the initial value of mss. You can change it
with the tcp nos command:
tcp mss 4096
tcp window 8192
I dont know what the "best" value is for AX25. I've also seen
improvements in speed by increasing Tcp_window to be very large.
As far as performance goes, we've modified ftpsubr slightly to
get a lot better thruput but one thing I've noticed is that every
single packet received gets it's own acknowledgement. Some systems
like hp-ux will ack N packets at once which cuts down on the overhead
on both the receiver and sender.
--
Glenn
------------------------------
End of TCP-Group Digest V94 #109
******************************