[9829] in North American Network Operators' Group
Re: NSP ... New Information
daemon@ATHENA.MIT.EDU (Miguel A.L. Paraz)
Thu Jun 5 07:33:41 1997
From: "Miguel A.L. Paraz" <map@iphil.net>
To: phil@charon.milepost.com (Phil Howard)
Date: Thu, 5 Jun 1997 19:02:20 +0800 (HKT)
Cc: nanog@merit.edu
In-Reply-To: <199706042028.PAA02495@charon.milepost.com> from "Phil Howard" at Jun 4, 97 03:28:32 pm
Hi,
Phil Howard wrote:
> In effect Sprint is encouraging the waste of IP space. I'm putting together
> 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 have at
> 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@iphil.net> +63-2-893-0850
iphil communications, makati city, philippines <http://www.iphil.net>
