Re: Routing problem with two ethernet cards?
have a look at iproute2, and www.lartc.org
:)
On Mon, 2005-11-28 at 21:21 +0000, Mike Richards wrote:
> This isn't exactly a firewall problem, but after searching through the
> archives this group seemed to be the most likely place to find an
> answer.
>
> I'm having a problem configuring two ethernet cards on the same
> machine (eth0 and eth1), both with public IP addresses but on
> different subnets.
>
> The first card works like a charm, but I cannot get anything to send
> out of the second card. The second card apparently will *receive* some
> data, but nothing is going out of it. I'm beginning to think it may be
> a routing problem.
>
> Here is what 'ifconfig' shows (IP addresses have been changed to
> protect the innocent):
>
> eth0 Link encap:Ethernet HWaddr 00:A0:D1:E0:74:49
> inet addr:214.74.101.116 Bcast:214.74.101.255 Mask:255.255.255.240
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:10893116 errors:0 dropped:0 overruns:0 frame:0
> TX packets:12493393 errors:0 dropped:0 overruns:0 carrier:0
> collisions:0 txqueuelen:1000
> RX bytes:3868304880 (3689.1 Mb) TX bytes:4112061528 (3921.5 Mb)
> Interrupt:16
>
> eth1 Link encap:Ethernet HWaddr 00:A0:D1:E0:74:AE
> inet addr:214.74.132.20 Bcast:214.74.132.255 Mask:255.255.255.240
> UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
> RX packets:107 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:6848 (6.6 Kb) TX bytes:0 (0.0 b)
> Interrupt:17
>
>
> And here is the output of 'route -n':
>
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 214.74.101.112 0.0.0.0 255.255.255.240 U 0 0 0 eth0
> 214.74.132.16 0.0.0.0 255.255.255.240 U 0 0 0 eth1
> 0.0.0.0 214.74.101.113 0.0.0.0 UG 0 0 0 eth0
>
>
> As you can see above, eth1 has something for RX packets/bytes, but
> nothing for TX. A ping to the eth0 IP address works fine, but a ping
> to the eth1 address never comes back.
>
> I've tried manually adding a gateway for eth1, ending up with the
> following 'route -n' output:
>
> Destination Gateway Genmask Flags Metric Ref Use Iface
> 214.74.101.112 0.0.0.0 255.255.255.240 U 0 0 0 eth0
> 214.74.132.0 214.74.132.17 255.255.255.240 UG 0 0 0 eth1
> 214.74.132.16 0.0.0.0 255.255.255.240 U 0 0 0 eth1
> 0.0.0.0 214.74.101.113 0.0.0.0 UG 0 0 0 eth0
>
> Obviously that didn't work though, or else I wouldn't be posting.
>
> Can anyone see what the problem might be here? I searched for hours
> trying to find sample output of a working configuration, but to no
> avail. I feel like it's something simple I'm just overlooking.
>
> Thanks,
> Mike
>
--
Charles Kidson
Systems Administrator
General Pants Group
charles.kidson@generalpants.com.au
Ph +61 2 9290 0813
Fx +61 2 9290 3339
Mb +61 428 617766
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