North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: NSP ... New Information
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 <[email protected]> +63-2-893-0850 iphil communications, makati city, philippines <http://www.iphil.net>
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