<html><head></head><body><div><br></div><div>I think bonding _is_ your solution. You have multiple ways of handling the joined connection and one way is failover. No traffic goes down your failover pipe except for the test packets to check status until the primary fails. You will still want to tweak some iptables to drop traffic that would overload the skinny backup line, i.e., specific systems can send out if primary goes down but general web stuff is banned from backup line. </div><div><br></div><div>On Thu, 2015-07-09 at 07:19 -0700, Alex Carver wrote:</div><blockquote type="cite"><pre>No, bonding wouldn't work in this case because I don't want to share the
bandwidth of the two connections. I want them to remain independent
using only the DSL link for all traffic unless the DSL link fails and
then a subset of traffic would go to the backup link. If the DSL link
is working the backup link ideally should never see a single packet.
On 2015-07-09 06:30, Sergio Chaves wrote:
<blockquote type="cite">
Wouldn't Network Bonding work for you? Check the active-backup setup.
<a href="http://wiki.centos.org/TipsAndTricks/BondingInterfaces">http://wiki.centos.org/TipsAndTricks/BondingInterfaces</a>
On Thu, Jul 9, 2015 at 12:05 AM, Alex Carver <<a href="mailto:agcarver+ale@acarver.net">agcarver+ale@acarver.net</a>>
wrote:
<blockquote type="cite">
Anyone have experience setting up dual WANs for failover (my guess is
there's a couple of you or I wouldn't really email the list ;) ).
I'm thinking about putting in a cellular modem at home to act as a
secondary/backup WAN link for critical functions (alert emails, security
system access) in case the primary WAN (DSL) drops. I don't want
traffic going over that link unless the DSL is dead so this is a true
failover rather than a load balance (or I suppose it's a load balance
with a ratio of infinity weighted towards the DSL)
My first thought was to use something like a Ubiquiti EdgeRouter Lite
(maybe need to go to the EdgeRouter 8, not sure) with two WANs
configured and then the NAT and public assignments behind the third
port. It appears EdgeOS can do two WANs but it's not clear from what
I've been able to dig up so I wanted to find out if there are
other/better options or suggestions.
</blockquote>
</blockquote>
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</pre></blockquote><div class="-x-evo-signature-wrapper"><span><pre>--
James P. Kinney III
Every time you stop a school, you will have to build a jail. What you
gain at one end you lose at the other. It's like feeding a dog on his
own tail. It won't fatten the dog.
- Speech 11/23/1900 Mark Twain
http://heretothereideas.blogspot.com/
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