ARIN, and reservations?

Thu May 17 16:21:04 UTC 2001

Hello Alex,

> For instance, we were assigned 64.21/17 about a year ago, 
> with 64.21/16 reserved (we were told).

ARIN does not guarantee reservations.  We do our best to make
contiguous allocations, and often do, but sometimes it is not
possible.

ARIN receives one or two /8s at a time from the IANA and
keeps aggregation in mind when making allocations. However,
we also have to demonstrate 80 percent of that IP address 
space has been allocated when requesting additional IP 
address space from the IANA.

> PS: as an aside, as anyone else noticed ARIN continually, 
> over the last year or so, making the allocations smaller 
> and smaller? Our first allocation ever was a /17; now we 
> get them in chunks of /19's. 

It is ARIN's current policy to issue IP address space to
organizations based to their three month need.  ARIN staff
review requests and make allocations in accordance with
this policy.

Richard Jimmerson
Director of Operations
American Registry for Internet Numbers (ARIN)

> -----Original Message-----
> From: owner-nanog at merit.edu [mailto:owner-nanog at merit.edu]On Behalf Of
> Alex Rubenstein
> Sent: Thursday, May 17, 2001 10:43 AM
> To: nanog at nanog.org
> Subject: ARIN, and reservations?
> 
> 
> 
> 
> An interesting note; has anyone else been assigned 
> non-contiguous space
> when the contiguous block had been 'reserved' for you? 
> 
> For instance, we were assigned 64.21/17 about a year ago, 
> with 64.21/16
> reserved (we were told). It was then extended to a /17 + /18.
> 
> We went to get more, and now we've got some other /19 (they haven't
> actually assigned it). 
> 
> The point is, if 64.21/16 had been reserved, as they had said 
> was done,
> today we'd only be making one announcement; 64.21/16; 
> instead, we have to
> announce a /17, /18, and a new /19, or three times the announcements.
> 
> On a grand scale, or even a moderate scale, three times the 
> announcements
> is a significant amount. 
> 
> Any comments?
> 
> PS: as an aside, as anyone else noticed ARIN continually, 
> over the last
> year or so, making the allocations smaller and smaller? Our first
> allocation ever was a /17; now we get them in chunks of 
> /19's. Does ARIN
> have any interest or care in the size of the global routing tree?
> 
> 
> 