Fail-over
Norman Zhang
norman.zhang at rd.arkonnetworks.com
Wed Feb 23 17:02:59 UTC 2005
Pete Tenereillo wrote:
>> You can have two A records in DNS, but if someone tries connecting to
>> the un-routable IP address it will fail. They will have to try again and
>> they could end up getting the same IP address again. They will have to
>> keep trying until they get the routable IP address.
>
> isn't really a correct answer. Virtually all Web clients, and most
> proxy servers, would connect to the other IP address should one become
> unreachable. The delay various between clients, but most are about 20s.
> More at: www.tenereillo.com/GSLBPageOfShame.htm.
>
> I don't see how DynDNS can help, and SRV records are a fantasy at this
> point.
I've seen HW routers claiming this can be done (e.g., Radware Linkproof,
ZyWALL35, Xincom). I'm discussing this at
http://www.dslreports.com/forum/remark,12739889~mode=flat, folks their
explained how DynDNS can work without BGP.
Regards,
Norman Zhang
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