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Date:      Wed, 5 Apr 2000 16:05:10 -0400
From:      "Crist J. Clark" <cjc@cc942873-a.ewndsr1.nj.home.com>
To:        Anders Andersson <anders@sanyusan.se>
Cc:        questions@FreeBSD.ORG
Subject:   Re: NAT/Gateway routing problems?
Message-ID:  <20000405160509.A930@cc942873-a.ewndsr1.nj.home.com>
In-Reply-To: <20000405083933.A40778@enterprise.sanyusan.se>; from anders@sanyusan.se on Wed, Apr 05, 2000 at 08:39:33AM %2B0200
References:  <20000404134336.A35647@enterprise.sanyusan.se> <20000404233725.B40889@cc942873-a.ewndsr1.nj.home.com> <20000405083933.A40778@enterprise.sanyusan.se>

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On Wed, Apr 05, 2000 at 08:39:33AM +0200, Anders Andersson wrote:
> on Tis, Apr 04, 2000 at 11:37:25pm -0400, Crist J. Clark wrote:
> > What is the output of,
> > 
> >   % netstat -rn
> 
> anders@gw$ netstat -rn
> Routing tables
> 
> Internet:
> Destination        Gateway            Flags      Netif Expire
> default            212.209.55.81      UGSc        ep0
> 127.0.0.1          127.0.0.1          UH          lo0
> 192.168.4          link#2             UC          ep1 =>
> 192.168.4.18       0:80:5f:d:5a:ba    UHLW        ep1   1030
> 192.168.4.19       0:8:c7:1b:ff:83    UHLW        ep1   1167
> 192.168.4.20       0:60:97:b4:dd:51   UHLW        ep1   1127
> 192.168.4.23       0:60:97:b8:b5:31   UHLW        ep1    857
> 192.168.4.255      ff:ff:ff:ff:ff:ff  UHLWb       ep1
> 212.209.55.80/28   link#1             UC          ep0 =>
> 212.209.55.81      link#1             UHLW        ep0 =>
> 212.209.55.83      0:60:97:b4:dd:20   UHLW        ep0    771
> 212.209.55.95      ff:ff:ff:ff:ff:ff  UHLWb       ep0

Everything looks good. No routing problems.

> >   % netstat -in
> 
> anders@gw$ netstat -in
> Name  Mtu   Network       Address            Ipkts Ierrs    Opkts Oerrs Coll
> ep0   1500  <Link#1>    00:20:af:b7:80:72   322968    31   276938     0 0
> ep0   1500  212.209.55.80 212.209.55.82     322968    31   276938     0 0
> ep1   1500  <Link#2>    00:20:af:b7:66:b0   286324     0   308479     0 0
> ep1   1500  192.168.4     192.168.4.17      286324     0   308479     0 0
> lo0   16384 <Link#3>                            24     0       24     0 0
> lo0   16384 127           127.0.0.1             24     0       24     0 0

OK, not a lot of collisions... well, none actually (as we might expect
on a switch) and low Ierrs and Oerrs. Everything looking good.

> >   % ifconfig -a
> 
> anders@gw$ ifconfig -a
> ep0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> 	inet 212.209.55.82 netmask 0xfffffff0 broadcast 212.209.55.95
> 	ether 00:20:af:b7:80:72 
> 	media: 10baseT/UTP
> 	supported media: 10base2/BNC 10baseT/UTP 10base5/AUI
> ep1: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> mtu 1500
> 	inet 192.168.4.17 netmask 0xffffff00 broadcast 192.168.4.255
> 	ether 00:20:af:b7:66:b0 
> 	media: 10baseT/UTP
> 	supported media: 10base2/BNC 10baseT/UTP 10base5/AUI
> lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> mtu 16384
> 	inet 127.0.0.1 netmask 0xff000000 

I was curious if there might be simplex-duplex issues. Does not look
like these cards do full-duplex anyway?

> >   % uptime
> 
> anders@gw$ uptime
>  8:37AM  up 4 days, 18:49, 1 user, load averages: 0.05, 0.02, 0.01

Wanted to see the load average. It is low.

> >   % ps aux
> 
> anders@gw$ ps aux
> USER     PID %CPU %MEM   VSZ  RSS  TT  STAT STARTED      TIME COMMAND
> root       1  0.0  1.0   512  136  ??  ILs  Fri03PM   0:00.05 /sbin/init --
> root       2  0.0  0.1     0    0  ??  DL   Fri03PM   0:03.10 (pagedaemon)
> root       3  0.0  0.1     0    0  ??  DL   Fri03PM   0:00.00 (vmdaemon)
> root       4  0.0  0.1     0    0  ??  DL   Fri03PM   0:04.95 (bufdaemon)
> root       5  0.0  0.1     0    0  ??  DL   Fri03PM   1:30.60 (syncer)
> root      29  0.0  0.1   208    0  ??  Is   Fri03PM   0:00.00 adjkerntz -i
> root      86  0.0  1.5   448  196  ??  Ss   Fri01PM   7:31.75 /sbin/natd -f /et
> root     103  0.0  2.4   876  320  ??  Ss   Fri01PM   0:06.20 syslogd -s -vv
> daemon   109  0.0  1.9   844  260  ??  Is   Fri01PM   0:08.86 rwhod
> root     127  0.0  2.0   920  272  ??  Ss   Fri01PM   0:08.90 cron
> root     130  0.0  3.5  1740  480  ??  Is   Fri01PM   1:39.76 /usr/sbin/sshd
> root    7281  0.0  3.7   892  512  v0  Is+  12:20PM   0:00.05 /usr/libexec/gett
> root    8273  0.0  7.6  1764 1048  ??  S     8:33AM   0:00.79 sshd: anders@ttyp
> anders  8274  0.0  3.3   656  456  p0  Ss    8:33AM   0:00.21 -sh (sh)
> root       0  0.0  0.1     0    0  ??  DLs  Fri03PM   0:00.70 (swapper)
> anders  8288  0.0  1.6   404  212  p0  R+    8:38AM   0:00.01 ps aux

Wanted to see what might be eating memory and CPU. natd's usage is a
bit high, but nothing to be alarmed about.

I would have a look at the machines on either end or verify that you
get these slow transfers indepenent of the machine at either end (you
may have already done so).

If it is this NAT box, I really am not sure where to look next for
trouble.
-- 
Crist J. Clark                           cjclark@home.com


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