Re: Multihoming an end user
Mailing List wrote:
We're a small shop in regards to needed address space. In other words,
a full blown BGP4/ASN with a /20 allocation from ARIN isn't likely to be
justified. Can this be done using a private ASN? Another option?
How big is your address usage? Keep in mind that ASN allocation and
direct-from-ARIN address allocation are two separate entities. You can
get an ASN if you are multihomed, about to multihome, or otherwise have
a unique routing policy from your provider; it has nothing to do with
how many addresses you have. With regards to addresses, you only need a
/24 to successfully multihome, and you can get a /24 from your ISP.
Even if you don't have enough usage to directly justify a /24, you can
meet ARIN's justification requirements by multihoming (you can only get
one /24 that way, and you'll have to allow all of your ISPs to check
with each other on that). If you're big enough to justify a /22, you
can get a /22 out of a bigger ARIN block for multihomed folks.