On 2013-11-06, at 16:59, Joel van Velden
My understanding is multi-homing alone is enough to get a /24 from APNIC without justifying each address (after all you cant multi-home with less than a /24). Is this not the case?
It's difficult to persuade anybody other than the person you're directly paying money to to accept a longer v4 prefix than a /24. When you multi-home, you're usually interested in the propagation of your prefixes being as global as possible. So in every practical sense, you're right, you need to advertise prefixes of length 24 bits or shorter if you want to multi-home.
Presumably the same would be true for wanting a /24 to peer on APE/etc.
Although what with APNIC fees it wouldn't be real cheap.
PS: why do citylink require a /24 to peer?
Consenting peers (in the BGP sense) can exchange whatever routes they want. There's no reason you can't exchange /32s with your direct peers, if you have an agreement to do so. Joe