On 02/02/2012 11:28 AM, Nick wrote:
> And if it isn't, is there anything I should bear in mind when hacking a script
> to do this sort of thing, in order to avoid breaking my system or generally
> fighting against the system's assumptions?
>
I would have ping the gateway of primary link (maybe both) and some
outside IP on that path, and in case of timeouts I would activate
changes or something. Like "heartbeat" tests.
But I recommend you read:
http://www.shorewall.net/Shorewall_and_Routing.html
and then consider using shorewall in MultiISP environment. I do not
think Basic routing is able to deal with changing circumstances, at
least not fast enough. One solution would be running dynamic routing
protocols, like OSPF or OLSR, which involves running then on several
routers/systems, or using some active script like shorewall.
--
Ljubomir Ljubojevic
(Love is in the Air)
PL Computers
Serbia, Europe
Google is the Mother, Google is the Father, and traceroute is your
trusty Spiderman...
StarOS, Mikrotik and CentOS/RHEL/Linux consultant
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