How to wish you hadn't forced ipv6 adoption (was "How to force rapid ipv6 adoption")

Mark Andrews marka at
Fri Oct 2 07:01:52 UTC 2015

In message <560E1F7C.6030808 at>, Rob McEwen writes:
> On 10/2/2015 1:10 AM, Mark Andrews wrote:
> > or working out how many addresses a
> > site needs when handing out address blocks
> At first, I'm with you on this.. but then when you got to the part I 
> quoted above...
> it then seems like dividing lines can get really blurred here and this 
> statement might betray your premise. A site needing more than 1 
> address... subtly implies different usage case scenarios... for 
> different parts or different addresses on that block... which could slip 
> back into... "you blocked my whole /48... but the spam was only coming 
> from this tiny corner of the block over here (whether that be a one IP, 
> a /64, or a /56)... and now other parts of the block that were sending 
> out legit mail, are suffering".
> Likewise, sub-allocations can come into play, where a hoster is 
> delegated a /48, but then subdivides it for various customers.

A hoster is a LIR.  It isn't the end customer.
> -- 
> Rob McEwen
> +1 478-475-9032
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: marka at

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