Network problem

Mats Erlandson mats at tropeab.com
Tue Feb 22 19:23:27 UTC 2005 

The ifconfig output from 'problem' computer;
eth0      Link encap:Ethernet  HWaddr 00:0F:EA:5C:06:CF
          inet addr:192.168.0.90  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:1194 errors:0 dropped:0 overruns:0 frame:0
          TX packets:399 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:304926 (297.7 KiB)  TX bytes:46169 (45.0 KiB)
          Interrupt:209 Base address:0xc000

eth1      Link encap:Ethernet  HWaddr 00:50:BA:BA:02:C6
          inet addr:192.168.0.91  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:864 errors:0 dropped:0 overruns:0 frame:0
          TX packets:11 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:275934 (269.4 KiB)  TX bytes:812 (812.0 b)
          Interrupt:169 Base address:0xb000

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:1603 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1603 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:2342554 (2.2 MiB)  TX bytes:2342554 (2.2 MiB)

and the output from 'netstat -rn';

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 
eth0
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 
eth1
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
eth1
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 
eth0

Now from working computer 1;

eth0      Link encap:Ethernet  HWaddr 00:0C:76:AC:69:37
          inet addr:192.168.0.102  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:171 errors:0 dropped:0 overruns:0 frame:0
          TX packets:88 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:32372 (31.6 KiB)  TX bytes:10635 (10.3 KiB)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:13064 errors:0 dropped:0 overruns:0 frame:0
          TX packets:13064 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:16189940 (15.4 MiB)  TX bytes:16189940 (15.4 MiB)

and

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 
eth0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
eth0
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 
eth0

And, from a third computer (working);

ath0      Link encap:Ethernet  HWaddr 00:40:05:26:42:3A
          inet addr:192.168.0.103  Bcast:192.168.0.255  Mask:255.255.255.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:206854 errors:180304 dropped:0 overruns:0 frame:180304
          TX packets:141345 errors:1497 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:199
          RX bytes:222052073 (211.7 MiB)  TX bytes:17587750 (16.7 MiB)
          Interrupt:10 Memory:f8a40000-f8a50000

eth0      Link encap:Ethernet  HWaddr 00:00:39:2C:3D:C7
          UP BROADCAST 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 txqueuelen:1000
          RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)

lo        Link encap:Local Loopback
          inet addr:127.0.0.1  Mask:255.0.0.0
          UP LOOPBACK RUNNING  MTU:16436  Metric:1
          RX packets:3447 errors:0 dropped:0 overruns:0 frame:0
          TX packets:3447 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:4227407 (4.0 MiB)  TX bytes:4227407 (4.0 MiB)

and

Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt 
Iface
192.168.0.0     0.0.0.0         255.255.255.0   U         0 0          0 
ath0
169.254.0.0     0.0.0.0         255.255.0.0     U         0 0          0 
ath0
0.0.0.0         192.168.0.1     0.0.0.0         UG        0 0          0 
ath0

Let me know if you want more information.

Regards,
Mats


Rick Stevens wrote:

> Mats Erlandson wrote:
>
>> I have just added another computer, having two network cards, to my 
>> network.  The networking, I believe, is set up similarly to another 
>> computer on the network.  The computers/devices on the network are 
>> connected through a switch (DLink DI-624+).  The original computers 
>> have no communications problems of any kind.  However, the newly 
>> introduced computer cannot talk directly to the switch/gateway/DHCP 
>> server but can access the other computers/devices on the local 
>> network, unbelievably through the switch, nor can it access the 
>> internet.
>>
>> Does anyone have a clue to where my problem is?
>
>
> We'd need to see the output of "ifconfig -a" on all three, along with
> the output of "netstat -rn" on all three.
> ----------------------------------------------------------------------
> - Rick Stevens, Senior Systems Engineer     rstevens at vitalstream.com -
> - VitalStream, Inc.                       http://www.vitalstream.com -
> -                                                                    -
> -           Blech!  ACKth!  Ooop!  -- Bill the Cat (Outland)         -
> ----------------------------------------------------------------------
>
>

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