[TriLUG] Conflicting Default Gateways
cgbullock at gmail.com
Mon Aug 16 16:14:27 EDT 2004
If the only reason for the second gateway is downloading isos from a
specific site I would do this
ip r add $iso_repository_ip dev eth1
ip r add default dev eth0
On Mon, 16 Aug 2004 11:29:08 -0400, Brian Henning
<brian at strutmasters.com> wrote:
> Hi List,
> Ok, I think I have a foggy idea of why this is the case, but I would
> greatly appreciate some tips on how to get around it:
> I've got a server with two NICs which are on different subnets (for
> argument's sake, we'll say eth0 is on 192.168.50.0/24 and eth1 is on
> 192.168.100.0/24). Both subnets have their own internet gateways; .50 has
> 1.5Mbit DSL service, and .100 has some sort of cable-based service. Right
> now, eth0 is configured to its subnet's default gateway (.50.1), and eth1 is
> configured with no default gateway. In this configuration, things work
> normally. However, if I configure eth1 to be aware of its default gateway
> (.100.1), something becomes amiss, and things such as host and dig get
> broken. I'm using system-config-network to make these settings; I don't
> know if that matters.
> Ordinarily, I simply wouldn't care. The server does all its dirty work via
> eth0 anyhow. The problem is, I would like to have it download large files
> (such as the FC3 ISOs) using eth1, so that the DSL bandwidth isn't hogged.
> I don't care about maxing out the cable bandwidth, because no one uses it
> (it's only there as a failsafe in case the DSL goes down); but everyone uses
> the DSL so I'd have to do something like only download overnight, or
> rate-limit, neither of which is a solution I am patient enough to persue.
> So, is there a way to achieve this? It seems like I should just be able to
> configure each interface's default gateway and tell the ftp client to bind
> to eth1, but as I've explained, attempting to have both interfaces' default
> gateways configured seems to result in some kind of conflict.
> Thanks for all the help!
> Brian A. Henning
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