[Date Prev][Date Next] [Thread Prev][Thread Next] [Date Index] [Thread Index]

Re: two network cards on a server



On Wed, Apr 18, 2007 at 05:39:40PM -0400, Faheem Mitha wrote:
> 
> 
> On Wed, 18 Apr 2007, Roberto C. Sánchez wrote:
> 
> >On Wed, Apr 18, 2007 at 04:20:49PM -0400, Faheem Mitha wrote:
> >>
> >>Hi everyone,
> >>
> >>I've got a server on which there are two network cards. One of the network
> >>cards has been configured, and has been running satisfactorily for a
> >>while. I recently plugged in the other network card and started using it
> >>for a different IP address. However, I've been having persistent problems
> >>with that interface. Namely, some of the time I can't connect to the
> >>interface, which seems to go up and down unpredictably, and floods the
> >>system logs with DHCP requests. Clearly something is badly wrong here, and
> >>I am hoping this is something simple that can be fixed easily.
> >>
> >Are eth1 and eth0 configured to be on the same subnet?
> >
> >Regards,
> >
> >-Roberto
> 
> Yes. I can send you the output of ifconfig if useful.
> 
> The addresses are both in the 152.3.172.* subnet.
> 
Well, there is your problem.

Having two physical interfaces on the same subnet is generally a bad
idea:

http://lists.debian.org/debian-user/2007/01/msg01633.html
http://lists.debian.org/debian-firewall/2005/03/msg00073.html

You have to really know what you are doing.  It appears that you have
overlooked something in your configuration.  If you can provide more
details, I or someone else might be able to help get you going in the
right direction.

Regards,

-Roberto
-- 
Roberto C. Sánchez
http://people.connexer.com/~roberto
http://www.connexer.com

Attachment: signature.asc
Description: Digital signature


Reply to: