North American Network Operators Group|
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Re: Alternative to BGP-4 for multihoming?
On Wed, 1 Mar 2000, David Israel wrote: > The documentation is pretty vague on a few points, but it looks like > all it does is NAT and (possibly, it's very bague on this point) resolve > DNS for servers based on what it thinks is the best path to use. There's > just a static route on your side; the customer gets a network from each > ISP, and the LinkProof NATs to whichever network it thinks is best. > > Good points: He isn't peering with you. You don't need to do anything > to support this. Just statically route him and let him do the rest. > > Bad points: He asked if you support it; ergo, he doesn't know how it > works. Prepare your NOC/customer service folks for this guy to call > in and bitch if the thing fails. It's also wasteful of IP addresses > if the guy's got a big network back there, since he has to number > every machine seperately for every connection he's got. Lastly, they're > really vague in the online docs on how, exactly, they redirect traffic > going to the customer. They just say they redirect it, and later say that > the box will be "taking responsibility for... DNS support for resources > that need to be accessed from the Internet." Sounds iffy to me. > > In short, if it were my customer, I'd say something like, "It's your > funeral. Have a ball." Only I'd say it nicely. Oy. This stuff seems similar to what I ran on my home network(NAT plus smart DNS servers that gave out IPs on the links that were up). It worked semi-decent, only that failover sometimes took ages because of all the DNS caches in the world which don't care which TTL you set, or have a notion of 'minimal TTL' below which they won't accept your records, end clients caching records infinitely (well, until the next reboot/app restart). All in all, I'd say it works in 95% of cases, and certainly good enough for home network, but using it in enterprise connectivity is silly. -- Alex Pilosov | http://www.acecape.com/dsl Acecape, Inc. | AceDSL:The best ADSL in Bell Atlantic area 325 W 38 St. Suite 1005 | New York, NY 10018 |