nanog mailing list archives
Re: CIDR FAQ
From: Dorian Rysling Kim <dorian () CIC Net>
Date: Fri, 18 Aug 1995 01:38:39 -0400 (EDT)
On Fri, 18 Aug 1995, Hank Nussbacher wrote:
Ah. here is the rub. When you ISP buddies come back, you should ask them to return the origianal /22 for a /20. That way, the total size of the routing system stays the same!Great idea. Know ANYONE who does that? The best I can do is give them a /20 (in addition to the original /22) if their growth warrants it.
Sure. We are starting to do that. We are trying to put into practice following allocation strategy: 1) when allocating, leave enough holes so the address space can be grown within that /16. For example, leaving next three spaces unallocated when assigning /24. We try to guess at who'll be growing and how much. It's not perfect, but it's better than nothing. 2) if the site returns /24, or /23, or /22, and we can't grow that address block, we try to see if we can recycle the old block and assign a new larger block. This way, if our internal routing changes, and our old aggregation scheme breaks, we keep renumbering to the minimum. -dorian ______________________________________________________________________________ Dorian Kim Email: dorian () cic net 2901 Hubbard Drive Network Engineer Phone: (313)998-6976 Ann Arbor MI 48105 CICNet Network Systems Fax: (313)998-6105 http://www.cic.net/~dorian
Current thread:
- Re: CIDR FAQ, (continued)
- Re: CIDR FAQ Gary Wright (Aug 17)
- Re: CIDR FAQ Arnold Nipper (Aug 17)
- Re: CIDR FAQ Curtis Villamizar (Aug 17)
- Re: CIDR FAQ Arnold Nipper (Aug 18)
- Re: CIDR FAQ Curtis Villamizar (Aug 17)
- Re: CIDR FAQ Sean Doran (Aug 17)
- Re: CIDR FAQ Sean Doran (Aug 17)
- Re: CIDR FAQ Sean Doran (Aug 17)
- Re: CIDR FAQ Dave Siegel (Aug 17)
- Re: CIDR FAQ Sean Doran (Aug 17)
- Re: CIDR FAQ Hank Nussbacher (Aug 17)
- Re: CIDR FAQ Dorian Rysling Kim (Aug 17)
- Re: CIDR FAQ Elise Gerich (Aug 18)
- Re: CIDR FAQ Dorian Rysling Kim (Aug 17)
- Re: CIDR FAQ Hank Nussbacher (Aug 17)
- Re: CIDR FAQ Guy T Almes (Aug 18)
- Re: CIDR FAQ Kent W. England (Aug 18)
- Re: CIDR FAQ Yakov Rekhter (Aug 18)
- Re: CIDR FAQ Ross Veach (Aug 18)
- Re: CIDR FAQ Ross Veach (Aug 18)
- Re: CIDR FAQ Dave Siegel (Aug 18)