[plug] OT: Pool of IPs for testing load-balanced connections

Tim weirdit at gmail.com
Thu Sep 3 11:10:37 WST 2009

Universities. ISP ftp servers. Friends static ip's. Friends servers
hosted somewhere?

How does the pool work? Do you have a server on the net that can
maintain the pool list itself, by testing for internet connections to
these ip address and if they are working, then to keep them on the
list, if they aren't then to drop them. And when these networks have
internet access, they update the list off your server?

Or better yet.... How about the root DNS servers? (Ducks from any
flack headed my way about extra load and miss using the root DNS


On Thu, Sep 3, 2009 at 11:01 AM, Adrian Woodley<Adrian at diskworld.com.au> wrote:
> G'day PLUGers,
> I've just about finished the new design for the networking of the various
> mobile comms facilities at work. Each comms unit should have an Internet
> connection, either via NextG or a satellite uplink.
> The new network design will allow any combination of comms facilities and
> up-links to join the Local Inter-Network Connection (LINC) and share their
> routing information.
> Once the facilities are networked, the device with the highest priority will
> be elected the default gateway for all other devices. Additionally, each
> facility, with its own Internet connection, will load-balance between its
> connection and the elected gateway.
> The (minor) issue I'm facing is that for the load balancing to work, the
> router (embedded system running pfSense) needs to be able to ping a (unique)
> target out on the Internet. What I need is a pool of very stable IPs to test
> against, say around two dozen.
> The targets must be IPs, rather than host-names, as until a ping is
> successful there is no Internet connection and therefore no DNS.
> Any suggestions?
> Adrian
> _______________________________________________
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Timothy White - Somewhere in Australia

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