Multihoming - Resilience or Independence
Poul-Henning Kamp phk at critter.freebsd.dk
Wed Oct 10 23:18:39 CEST 2001
In message <200110102043.FAA26347 at necom830.hpcl.titech.ac.jp>, Masataka Ohta wr ites: >> So far I have not seen anybody really say "this is how it should be done". > > draft-ohta-e2e-multihoming-00.txt > >is dated April 2000. And, according to IETF rules, because of its age: obsolete ? >And, now, there even is a multi6 WG of IETF. Cool, lets see what they can disagree on in a couple of years... >> My current advice to my customers are therefore: Multiple IP# per >> server, use DNS for load-balancing. > >The problem is that load-balancing is not a reason for multi-homing. (For the moment, you can save yourself a lot of time by assuming that I actually know what I'm talking about :-) Load-balancing means different things to different people... Some people include in "load-balancing" the ability to disable non-responsive servers, upstream providers and so on. Just as we learned that checksums and handshakes only matter if they are end-to-end, the same way people will eventually realize that load-balancing, redundancy and resillience only matter if implemented end-to-end. But that doesn't change the fact that people will still want a solution now, that neither "go to IPv6" nor "wait for IPv6" will satisfy them and that ISP's who are able to meet this demand will make more money than ISP's who can't... Human nature being what it is, we can also pressume that rules will be bent as far as possible and that more money speaks louder... -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk at FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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