NSP ... New Information
Stephen A Misel
stevem at hway.net
Thu Jun 5 15:39:40 UTC 1997
Interesting. I haven't contemplated any aspect of your idea other than
nameserver restarts. With 30,000 domains hosted here, our nameserver
(which, according to the INTERNIC, is authorative for more domains than any
nameserver in the world) takes about 20 minutes to restart (it's an SGI
Challenge S). Our secondaries take a little longer.
That's with one A record per domain.
Restarting a nameserver every time a link gets sick is not an option, at
least for us.
At 07:02 PM 6/5/97 +0800, Miguel A.L. Paraz wrote:
>Phil Howard wrote:
>> In effect Sprint is encouraging the waste of IP space. I'm putting
>> a proposal now for a web farm type of facility for a group of investors and
>> a block of /19 is way more than is needed. But the plan is going to
>> least 4 points of multi-homing to diverse backbone providers, so a fully
>> announceable block is essential.
>Idea: How about getting provider-dependent space from each one, then make
>the web servers listen on different addresses each. Rig the DNS with a low
>TTL for the server A records, or perhaps use dynamic updates (haven't tried
>it yet though) to remove the IP from the A list if a link goes down.
>Example you get space from:
>ISP A 10.0.0.0/24
>ISP B 10.1.0.0/24
>ISP C 10.2.0.0/24
>ISP D 10.3.0.0/24
>So you have:
>www.customer1.com IN A 10.0.0.1
> IN A 10.1.0.1
> IN A 10.2.0.1
> IN A 10.3.0.1
>www.customer2.com IN A 10.0.0.2
> IN A 10.1.0.2
> IN A 10.2.0.2
> IN A 10.3.0.2
>Now if ISP C goes down, delete 10.2.0.1 and 10.2.0.2 from the list.
>miguel a.l. paraz <map at iphil.net>
>iphil communications, makati city, philippines
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