Re: [TCLUG:3673] TCP/IP performance problem.

["Troy Johnson" <troy@minco.com>]

Any interesting messages in /var/log/messages when doing this? What
does your /etc/hosts file look like? It may not seem to be a DNS
problem but you might be waiting for a timeout on a lookup or reverse
lookup (for IP addresses). Just throwing things out there, good luck,

Troy

>>> Tim Neu <tim@tneu.visi.com> 01/22 9:50 PM >>>

I'm having what appears to be a TCP/IP performance problem on my
home
network.  Another PC on the same network takes 30-40 seconds to
telnet to
my Linux box, even when I telnet by IP address only (i.e. it is not
DNS)...  It is intermittant; but it happens 70% of the time...   
Also,
seemingly related; some of the networking utils suffer from the same
delays: netstat & route. 

My network configuration is this:

Primary Logical Network: 192.168.1.0 class C.   Linux box is
192.168.1.1
(eth0)

Second Logical Network: 163.228.0.0, class B.  Linux box is
163.228.19.194 (eth0:0)

Both neworks are on the same physical network, but the problem exists
even
if I am connecting from two PC's on the same logical network... (i.e.
I
don't think the second logical network is part of the problem)

Here are the outputs of all of the networking utils:

butch# ifconfig
lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:3924  Metric:1
          RX packets:1354 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1354 errors:0 dropped:0 overruns:0 carrier:0
          Collisions:0

eth0      Link encap:Ethernet  HWaddr 00:40:05:21:82:0D
          inet addr:192.168.1.1  Bcast:192.168.1.255 
Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:108635 errors:0 dropped:0 overruns:0 frame:0
          TX packets:117652 errors:0 dropped:0 overruns:0 carrier:0
          Collisions:0
          Interrupt:10 Base address:0x300  

eth0:0    Link encap:Ethernet  HWaddr 00:40:05:21:82:0D
          inet addr:163.228.19.194  Bcast:163.228.255.255
Mask:255.255.0.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:0 errors:0 dropped:0 overruns:0 frame:0
          TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
          Collisions:0
          Interrupt:10 Base address:0x300   

butch# route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref   
Use
Iface
255.255.255.255 *               255.255.255.255 UH    0      0       
0
eth0
localnet        *               255.255.255.0   U     0      0       
0
eth0
secondnet       *               255.255.0.0     U     0      0       
0
eth0
default         163.228.19.193  0.0.0.0         UG    0      0       
0
eth0
 
butch# uname -a
Linux butch 2.2.0-pre7 #4 Wed Jan 20 23:27:13 CST 1999 i486 unknown 


I'm not real sure what the 255.255.255.255 entry is, I think it is
being
created somehow, because it comes back if I delete it.   The problem
happens in both version 2.0.33 and 2.2.0-pre7...   The hardware is
not the
best, but is more than adaquate (486DX2/80 w/ 32MB)

Anybody have any ideas?  I'm stuck!

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
______         _ __          REAL men use LINUX!!!       $500 fine
per
  /           ' )  )                                     junk email
message
 / o ______    /  / _  . .   http://www.visi.com/~tneu/  Federal Law
/ <_/ / / <   /  (_</_(_/_     -tneu@visi.com-------     47USC, sec
227


---------------------------------------------------------------------
To unsubscribe, e-mail: tclug-list-unsubscribe@listserv.real-time.com

For additional commands, e-mail:
tclug-list-help@listserv.real-time.com

Try our website: http://tclug.real-time.com