Linux-Networking Digest #687, Volume #11 Sun, 27 Jun 99 02:13:41 EDT
Contents:
Ethernet working! Now PPP Doesn't!!! HA! (Jason Peacock)
Linux to Linux SLOW! (Barnaby DiAnni)
tcp_timestamps causing massive network slowdown problems under 2.2.x (Gary Elmes)
Re: Connecting 2 computer's in a network (David Efflandt)
Linux to Linux Slow! (Barnaby DiAnni)
Re: If I had a gun.... (Monte Phillips)
Linux to Linux Slow (Barnaby DiAnni)
Re: Strang problem with tcp-ip/pppd/kpppd (Monte Phillips)
Charter Communications and cable modems
Re: Why not C++ (Linus Torvalds)
Re: problems with prodigy and linux (Mircea)
downloads slow with 2.2 kernel (greg rudd)
----------------------------------------------------------------------------
From: [EMAIL PROTECTED] (Jason Peacock)
Subject: Ethernet working! Now PPP Doesn't!!! HA!
Date: Sun, 27 Jun 1999 04:48:00 GMT
Heh.. Like a slap in the face.. =)
Well, first off I'd like to thank the people who sent me a response in
my previous problem with getting my NIC card to work.. I can now
successfully mount a Win98 drive to my RH Linux machine using
smbmount, although I haven't been able to setup my Linux dirs to be
mountable on Win98 yet.. One step at a time.. =)
The thing that's kept me from pursuing this next goal is that once I
finally got my IPs setup and was able to do this minimum amount of
networking, all of the sudden my pppd doesn't want to work anymore..
I'm running Gnome with the Enlightenment manager, and use the Gnome
PPP dialer utility that came with the RPMs I d/led.. It worked fine
before.. Now it says " The pppd daemon died unexpectantly".
Ok.. So I go back into netcfg and look at the Interfaces section
there.. Surprisingly, only to see that my ppp0 entry has been
removed! I know it wasn't me.. must of been the gremlins that raided
my machine after midnight..
So I go to re-add my ppp0 entry, only for it to tell me that now
/dev/modem doesn't exist..
Strike 2
So I go into control-panel and use the modem utility there to set cua1
as my modem config, try to reactivate my ppp0 entry through netcfg,
and it just sits there.. doesn't dial like it used to..
I go back to the Gnome PPP dialer I switched to using, and it still
won't connect..
So now I'm at a loss.. I've searched through numerous HOWTOs and man
pages concerning PPP and Ethernet setup, and have had no luck
encountering such a problem. In fact, I haven't seen much in the way
of having a private network between two machines, while having a
dialup PPP account on the Linux side at all..
Is the local IP network I setup somehow interfering with me being able
to dial out on my Linux machine? I also have a modem on my Win98 box
and it works fine.
Here's a quick rundown of my systems if it helps any
=================================================================================
Win98 Linux
=========== =========
PII-350 K6-200
USR 56K USR 33.6
Kingston KNE20T Same, it's also NE2000 compatible
192.168.0.2 192.168.0.1
That's the relevant info I think may be needed..
I only want to net the two for file and printer sharing..
Don't really want a Gateway to the I-Net on the Linux since it's a
slower modem.. If I want to do that I may just look for options on the
'98 side.. Or else switch modems b/t the machines.. =)
Actually I just thought of one thing that may be the prob.. My NICs
don't have jumpers. You have to boot in DOS mode and run a config
program to update the settings.. On the Linux machine, some reason
the program found a conflict on port 240 with the NIC and switched it
to port 260 with IRQ 3. Correct me if I'm wrong but isn't IRQ 3 also
used for Com2 (cua1)?
Amazing the things you think of when you write such annoyingly long
messages!
Could the IRQ conflict be causing the problem, or would there be any
other conflicts involved if I correct this one? Are there any other
things I need to make sure I have setup correctly to ensure that my
private network and outside I-Net connection won't have any other
problems?
I'm gonna go check out this IRQ thing and see if that corrects it.
Thanx for the help!
Jason
------------------------------
Date: Sat, 26 Jun 1999 19:01:35 -1000
From: Barnaby DiAnni <[EMAIL PROTECTED]>
Subject: Linux to Linux SLOW!
Hello,
I have been puzzling over this for a few days,
and I am hoping for solution.
Please select a fixed width font to make
sense of this.
!-----------------------+---------------------
! Cable Modem
! |
! +--------+--------+
! | 10Mbps HUB |
! | Netgear EN104 |
! +--+-----------+--+
! | |
! +----------+ +----------+
! | |
! +----+----+ +-----------------+ +----+----+
! | eth0 | | | | eth0 |
! |Linux Box| | 100Mbps HUB | |Linux Box|
! | eth1 +--+ Netgear DS108 +--+eth1 |
! +---------+ | | +---------+
! +--------+--------+
! |
! +--------+--------+
! | Windows 98 |
! +--------+--------+
!-----------------------+-----------------------
Both Linux Boxes are multihomed.
All eth1 link lights show a 100Mbps connection.
FTP puts and get from Win 98 to both Linux Boxes
are about 2400 Kbytes per second or faster.
FTP puts and gets between the Linux boxes are about
200 Kbytes per second??
RX and TX activity is really on the 100Mbps hub.
Here is a session from Win98 to one of the Linux boxes.
ftp> bin
200 Type set to I.
ftp> get ie5win95.zip
200 PORT command successful.
150 Opening BINARY mode data connection for ie5win95.zip (25654086
bytes).
226 Transfer complete.
ftp: 25654086 bytes received in 10.49Seconds 2445.58Kbytes/sec.
ftp> put ie5win95.zip
200 PORT command successful.
150 Opening BINARY mode data connection for ie5win95.zip.
226 Transfer complete.
ftp: 25654086 bytes sent in 5.82Seconds 4407.92Kbytes/sec.
ftp>
Anyone have an idea what I'm doing wrong here?
Thanks,
Barnaby
------------------------------
From: Gary Elmes <[EMAIL PROTECTED]>
Subject: tcp_timestamps causing massive network slowdown problems under 2.2.x
Date: Sun, 27 Jun 1999 05:06:32 +0000
I have just had a couple of fun days trying to work out why my http
downloads slow to a crawl from certain sites.
I solved the problem by setting /proc/sys/net/ipv4/tcp_timestamps = 0.
Is this a known problem?
I found that, with timestamps on, packets from problematic sites
(www.isc.org was the one I tripped over) were showing up as fragmented
by tcpdump, even though I have the kernel compiled to reassemble
fragmented packets. In addition, the remote http host took yonks
(minutes at a time) to respond.
Typically, a 1460-byte packet would be fragmented into 1448 and 12.
Disabling timestamps solved the problem - no fragmenting, no slowdown,
nice whizzy downloads. I now have:
cat 0 > /proc/sys/net/ipv4/tcp_timestamps
in my rc.local, and everything is fine.
I reproduced the problem under both 2.2.1 and 2.2.10, and with all
manner of network-related bits both compiled in and left out of the
kernel (all in an effort to diagnose the problem). I reproduced it with
both lynx and communicator, as well. My connection to the internet is
via dial-up ppp; and stuffing with all the available ppp options
(compression, mru, mtu, etc.) did nothing to solve the problem. Other
machines - both win95 and linux 2.0.36 - using this box as a gateway to
the internet did not have the problem (timestamps were not set on their
packets).
Should somebody be fixing something in the timestamping code, or is my
"fix" just working around the real problem?
--
+---------- gazza @ iconz.co.nz is Gary Elmes, Auckland, NZ --------+
|"The reasonable man adapts himself to the World, the unreasonable one|
|persists in trying to adapt the World to himself. Therefore all |
|progress depends on unreasonable men." - George Bernard Shaw |
+--------------- public PGP key available on request -----------------+
------------------------------
From: [EMAIL PROTECTED] (David Efflandt)
Subject: Re: Connecting 2 computer's in a network
Date: 27 Jun 1999 05:28:42 GMT
Reply-To: [EMAIL PROTECTED]
On Sat, 26 Jun 1999 19:56:55 +0200, Tycho Scholtens
<[EMAIL PROTECTED]> wrote:
>
>I now have linux running on 2 comp's. Both have a NE2000 compatible
>network-card. How can i set up the network under linux
Have you looked at the files under a path like /usr/doc/HOWTO?
--
David Efflandt [EMAIL PROTECTED] http://www.xnet.com/~efflandt/
http://www.de-srv.com/ http://cgi-help.virtualave.net/
------------------------------
Date: Sat, 26 Jun 1999 19:36:05 -1000
From: Barnaby DiAnni <[EMAIL PROTECTED]>
Subject: Linux to Linux Slow!
Hello,
I have been puzzling over this for a few days,
and I am hoping for solution.
Please select a fixed width font to make
sense of this.
!-----------------------+---------------------
! Cable Modem
! |
! +--------+--------+
! | 10Mbps HUB |
! | Netgear EN104 |
! +--+-----------+--+
! | |
! +----------+ +----------+
! | |
! +----+----+ +-----------------+ +----+----+
! | eth0 | | | | eth0 |
! |Linux Box| | 100Mbps HUB | |Linux Box|
! | eth1 +--+ Netgear DS108 +--+eth1 |
! +---------+ | | +---------+
! +--------+--------+
! |
! +--------+--------+
! | Windows 98 |
! +--------+--------+
!-----------------------+-----------------------
Both Linux Boxes are multihomed.
All eth1 link lights show a 100Mbps connection.
FTP puts and get from Win 98 to both Linux Boxes
are about 2400 Kbytes per second or faster.
FTP puts and gets between the Linux boxes are about
200 Kbytes per second??
RX and TX activity is really on the 100Mbps hub.
Here is a session from Win98 to one of the Linux boxes.
ftp> bin
200 Type set to I.
ftp> get ie5win95.zip
200 PORT command successful.
150 Opening BINARY mode data connection for ie5win95.zip (25654086
bytes).
226 Transfer complete.
ftp: 25654086 bytes received in 10.49Seconds 2445.58Kbytes/sec.
ftp> put ie5win95.zip
200 PORT command successful.
150 Opening BINARY mode data connection for ie5win95.zip.
226 Transfer complete.
ftp: 25654086 bytes sent in 5.82Seconds 4407.92Kbytes/sec.
ftp>
Anyone have an idea what I'm doing wrong here?
Thanks,
Barnaby
------------------------------
From: [EMAIL PROTECTED] (Monte Phillips)
Subject: Re: If I had a gun....
Date: Sun, 27 Jun 1999 04:23:19 GMT
This site has a step by step howto for complete setup of samba. steps
for both linux and the win machine. (and they really work <G>)
http://www.sfu.ca/~yzhang/linux/samba/index.html
and this one as well
http://home.talkcity.com/MigrationPath/maguai/samba.html
These sites singly or in combination are nearly guaranteed to get you
networked.
"James R. Barnett, Jr." <[EMAIL PROTECTED]> wrote:
>Okay, I am sure some of you have seen my posts in the past weeks. I am
>at my wits' end trying to set up a 2 machine network. Many of you have
>tried to help and I appreciate it, but nothing has worked so far. I have
>installed Win98 on both machines to ensure that the Ethernet Card,
>cables and hub were all functional. It worked in about 15 minutes. I
>bought the Book 'Linux Network Toolkit and followed the first two
>chapters exactly (which setup a Samba Server with windows client). I
>still cannot ping between the machines. The network cards went in fine
>during the Linux install. The modules loaded correctly with the
>autoprobe. cat proc/interrupts and cat proc/ioports both show the
>ethernet card is using the expected resources. ifconfig shows that eth0
>is up and running. My routing tables match exactly what is in the book.
>What on earth could I being doing wrong. If I didn't know better, I
>would think the hub didn't handle linux packets but I know that is
>ridiculous. Any one have any ideas? I am desperate and frustrated. I
>would be forever grateful to anyone who could help me get this working.
>Replies by email are more than welcome.
>
>JamesB
------------------------------
Date: Sat, 26 Jun 1999 19:43:22 -1000
From: Barnaby DiAnni <[EMAIL PROTECTED]>
Subject: Linux to Linux Slow
Hello,
I have been puzzling over this for a few days,
and I am hoping for solution.
Please select a fixed width font to make
sense of this.
!-----------------------+---------------------
! Cable Modem
! |
! +--------+--------+
! | 10Mbps HUB |
! | Netgear EN104 |
! +--+-----------+--+
! | |
! +----------+ +----------+
! | |
! +----+----+ +-----------------+ +----+----+
! | eth0 | | | | eth0 |
! |Linux Box| | 100Mbps HUB | |Linux Box|
! | eth1 +--+ Netgear DS108 +--+eth1 |
! +---------+ | | +---------+
! +--------+--------+
! |
! +--------+--------+
! | Windows 98 |
! +--------+--------+
!-----------------------+-----------------------
Both Linux Boxes are multihomed.
All eth1 link lights show a 100Mbps connection.
FTP puts and get from Win 98 to both Linux Boxes
are about 2400 Kbytes per second or faster.
FTP puts and gets between the Linux boxes are about
200 Kbytes per second??
RX and TX activity is really on the 100Mbps hub.
Here is a session from Win98 to one of the Linux boxes.
ftp> bin
200 Type set to I.
ftp> get ie5win95.zip
200 PORT command successful.
150 Opening BINARY mode data connection for ie5win95.zip (25654086
bytes).
226 Transfer complete.
ftp: 25654086 bytes received in 10.49Seconds 2445.58Kbytes/sec.
ftp> put ie5win95.zip
200 PORT command successful.
150 Opening BINARY mode data connection for ie5win95.zip.
226 Transfer complete.
ftp: 25654086 bytes sent in 5.82Seconds 4407.92Kbytes/sec.
ftp>
Anyone have an idea what I'm doing wrong here?
Thanks,
Barnaby
------------------------------
From: [EMAIL PROTECTED] (Monte Phillips)
Subject: Re: Strang problem with tcp-ip/pppd/kpppd
Date: Sun, 27 Jun 1999 04:21:34 GMT
Did you list the nameserver DNS's that your ISP furnished you? You
can enter them with the netconf or from control panel network
shawn" <[EMAIL PROTECTED]> wrote:
>I have tried through two different methods now and both give me the same
>result.
>Red hat 5.2 with some updates, in x-windows 3.3.3.1 I believe the number
>is, using the fancy network configure tool on the control bar, and settup up
>ppp and the proper dns' in the proper spot. I activate the ppp and it
>connects the ppp and gets the isp numbers appears to link up the ppp, but
>the tcp-ip isn't comminicating, can't ping out can't find a web page on the
>net for the life of me on the internet.
------------------------------
From: <[EMAIL PROTECTED]>
Subject: Charter Communications and cable modems
Date: 27 Jun 1999 05:30:38 GMT
Hi.
I was wondering if anybody has gotten there cable modem to work using
Charters Pipeline Cable service? I have a 3Com/US Robotics external cable
modem and I am trying to get it working under Linux. Any help would be
appreciated.
Thanks
================== Posted via SearchLinux ==================
http://www.searchlinux.com
------------------------------
From: [EMAIL PROTECTED] (Linus Torvalds)
Crossposted-To: comp.os.linux.development.apps,comp.os.linux.development.system
Subject: Re: Why not C++
Date: 27 Jun 1999 05:34:19 GMT
In article <[EMAIL PROTECTED]>,
Bruce Hoult <[EMAIL PROTECTED]> wrote:
>
>You may be able to find some particular C++ compiler that produces worse
>code compiling a C program than some particular C compiler, but that is a
>function of the compiler, not the language.
In theory, you're right.
In practice, C++ is a much more complex language. As such, C++
compilers are much more complex beasts. And that is why some C++
compilers do not generate as good code as the equivalent C compilers do.
In effect, what you're saying is "there is no theoretical reason why C++
would be any slower than C". And you're right.
But what others are saying is "a lot of existing C++ compilers generate
worse code than a lot of existing C compilers". And they are right too.
Sometimes theory matters. Sometimes it doesn't. The world is not as
simple as you make it out to be.
Linus
------------------------------
From: Mircea <[EMAIL PROTECTED]>
Subject: Re: problems with prodigy and linux
Date: Sun, 27 Jun 1999 01:56:27 -0400
I'm using prodigy right now. In Slackware 4.0, using kppp, it was a
breeze. It's basically supposed to be straightforward PAP for the
authentification. I used ezppp before, in Slack 3.6, and it was equally
simple. You shouldn't use a terminal to connect, in either Windows or
Linux, or a script in Linux, since this will only confuse the server.
Select "PAP" and let the program do its trick.
MST
Edward Elliott wrote:
>
> I am having trouble establishing a ppp session via prodigy under linux.
> The prodigy server prompts me for username and password, then sends
> back two responses, "Incorrect Service Type" and "Invalid username/password",
> then prompts me for username and password again. I have verfied the
> username and password, that isn't the problem. The same thing happens
> to me if I try to connect to prodigy manually under windows 98 (with the
> terminal window for raw communication with the server), but if I let
> windows pass the login info for me the connection goes up just fine.
> Has anyone set up linux to work with a prodigy account before, or otherwise
> think they can help?
------------------------------
From: greg rudd <[EMAIL PROTECTED]>
Subject: downloads slow with 2.2 kernel
Date: Sat, 26 Jun 1999 23:02:15 -0700
Problem is with ppp performance on RedHat 6.0 system with 2.2.5 kernel
compared to performance on RedHat 5.2 system with 2.0.36 kernel.
Problem is downloading of large (200 to 400K) JPEG and GIF files on
RedHat 6.0 system causes Netscape to continually stall and stop
receiving data many times during the download. If you leave Netscape
along, eventually the link will begin sending data again, and the status
message will change from stalled to the amount of data coming over the
connection. Do not have this problem with RedHat 5.2 with 2.0.36
kernel. Using same ppp scripts and serial port setup on both systems.
It seems to me that the 2.2 series kernels may be having a flow control
or some other problem with large downloads. Has anyone else experienced
similar problems with the 2.2 series kernels?
------------------------------
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End of Linux-Networking Digest
******************************
