Re: Least expensive connection?

rico_001@xxxxxxxxxxx (Rico) hath wroth:

In article <3on5425qv0on2lv138i42i1n2tbaflt2uq@xxxxxxx>, Dave Rudisill <denali@xxxxxxxxxx> wrote:
A while back, somebody (probably Jeff) described how a system makes a
choice between two Internet connections when deciding which to use when
sending data. There was some mechanism for deciding which was the "least
expensive" connection, as I recall.

Can somebody point me to that post?

Failover? Load distribution? Route optimization? QoS? Whatcha
trying to accomplish?

There are several protocols that will do this. If you're using cheap
routers, it's called RIP or RIP-2 (Router Information Protocol)
dynamic routing. If you have two routers, with two seperate
connections to the internet, RIP will juggle the routing tables
depending on which route is "best" based on the fewest number of hops
(or cost). I don't recommend this approach because it only uses one
route at a time.

I much prefer a "load balancing router" which uses all routes at the
same time. See:
http://www.edimax.com/html/english/products/list-PRIrouter.htm
http://www.xincom.com/twinwan.html
http://www.dlink.com/products/?pid=452
http://www.xrio.co.uk/QB/

If you have more than one path to the internet, such a load balancing
router will distribute the traffic between the two paths. There are
some limitations in terms of what can be done. If you have two
1.5Mbits/sec DSL lines, it will not combine the speeds of these two
connections into a single stream for downloading from a single server.
However, if you have two downloads running at the same time, from two
different web servers, such a router will allocate 1.5Mbits/sec to
each download. Methinks this is much better than switching or
failover. I had one such system with a DSL and an ISDN connection at
a customers. They were running for a week with the DSL dead, and
nobody even noticed the interruption.

There are other schemes and products available depending on what
you're trying to accomplish. Ummm.... what are you trying to
accomplish and what do you have to work with?

Note: This has little or nothing to do with wireless internet.

--
Jeff Liebermann jeffl@xxxxxxxxxxxxxxxxxxxxxx
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
.

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