[AusNOG] RFC7094 - "Architectural Considerations of IP Anycast"

[Mark ZZZ Smith]

>________________________________
> From: Joshua D'Alton <joshua at railgun.com.au>
>To: Mark ZZZ Smith <markzzzsmith at yahoo.com.au> 
>Cc: "ausnog at lists.ausnog.net" <ausnog at lists.ausnog.net> 
>Sent: Monday, 20 January 2014 9:47 PM
>Subject: Re: [AusNOG] RFC7094 - "Architectural Considerations of IP Anycast"
> 
>
>
>Very interesting read..:
>4.1 "This is why the Anycast BOF concluded that "the use of global anycast addresses was not expected to scale and hence was expected to be limited to a small number of key uses"."   
>I found particularly thoughtful, however without seemingly a solution as of yet to that particular problem.

There currently isn't one. Large scale use of anycast would blow up the global route table.

Some of the other technologies that split the locator and identifier properties of an IP address might allow anycast to scale, although there may not end up being a need - I can't think of why lots of people would want to provide lots of individual global anycast services.

> I'm surprised the smart folks at Akamai, Cloudflare, and Arbor etc aren't involved in that RFC, I'd expect they would be some of the largest players/users besides the root/gTLD operators.
>

This RFC has been in development since at least 2010, so there has been plenty of opportunity for anybody to comment or contribute if they wanted to (you don't need to be invited or need permission, you just need something useful to contribute - I suggested highlighting IPv6's support of on-link anycast, among other things, back around the 1st or 2nd draft). However, regarding Arbor, Danny McPherson, one of the authors, is ex-Arbor. 


Regards,
Mark.


>
>Thanks for the link!
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>On Mon, Jan 20, 2014 at 9:20 PM, Mark ZZZ Smith <markzzzsmith at yahoo.com.au> wrote:
>
>Hi,
>>
>>A new RFC was published today which might be of interest to people on this list:
>>
>>
>>RFC7094 - "Architectural Considerations of IP Anycast"
>>http://tools.ietf.org/html/rfc7094
>>
>>
>>Although the title may sound a bit dry, it is a very comprehensive collection of information and references regarding the use of Anycast under both IPv4 and IPv6. Although I'd previously use anycast IP for DNS resolvers, when I reviewed it early in its development (2010 IIRC), I was surprised at how much thought, development and experimentation had actually gone on since the original idea.
>>
>>HTH,
>>Mark.
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