To follow up, I had attempted this configuration before submitting the post
to the mailing list over the past few days. Last night after reading Martin
Brown''s documentation, I discovered that I was ignorant of the
arp_filter
switch. After toggling arp_filter on it is working well.
Martin, thank you for providing your Guide to IP Layer Network
Administration with Linux.
Regards,
Jake
> -----Original Message-----
> From: Jake L. Wegman
> Sent: Thursday, March 18, 2004 2:37 PM
> To: ''lartc@mailman.ds9a.nl''
> Subject: One interface, 2 ISPs
>
> Good afternoon everyone!
>
> I''m a iproute2 newbie however I''ve subscribed to the list
since 2/9/03 -
> I''ve re-looked through my archives for my situation and
didn''t notice it.
> Forgive me if this has been hashed through before...
>
> I currently have "Split Access" (per the LARTC HOWTO) working on
a server
> with two external interfaces (1 interface per ISP).
>
> I have another server with a single interface connected to a
"Internet"
> hub cascading from ISP1 (SDSL router).
>
> Is it feasible to connect ISP2 (second SDSL router) to that same
> "Internet" hub, then create an alias for the IP on the other
subnet from
> ISP2?
>
> [ISP1 - 216.xxx.xxx.112/28] \
> > [24 port "Internet" Hub] -> [Webmail
> Server]
> [ISP2 - 209.xxx.xxx.96/27] /
>
>
> Webmail Server:
> - eth0 - IP 216.xxx.xxx.119, DG 216.xxx.xxx.113
> - eth0:1 - IP 209.xxx.xxx.101, DG 209.xxx.xxx.97
>
> So, my question is if I can use a single interface with two IP addresses
> each on different subnets and have the appropriate "default"
routes to
> each of the SDSL routers?
>
> Is this a workable solution?
>
> If so, perhaps someone could direct me to an example configuration?
>
> The server is Gentoo running a 2.4.20 kernel, iproute2-ss010824, iptables
> v1.2.8
>
> Regards,
> Jake
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