nanog mailing list archives
Re: quietly....
From: Owen DeLong <owen () delong com>
Date: Tue, 1 Feb 2011 18:03:38 -0800
On Feb 1, 2011, at 3:41 PM, Karl Auer wrote:
On Tue, 2011-02-01 at 13:38 -0800, Owen DeLong wrote:NAT solves exactly one problem. It provides a way to reduce address consumption to work around a shortage of addresses.Devil's advocate hat on: NAT (in its most common form) also permits internal addressing to be independent of external addressing.
Which is a bug, not a feature.
The side effects of that are not necessarily desirable (loss of end-to-end connectivity, performance issues, limitations on simultaneous connections etc etc).
Exactly.
It seems to me that it is this property of NAT that people are most loath to lose. And why ULA looks tantalisingly delicious.
Yeah, but, if we take a step back and look for what they actually want that they are willing to give up everything else to get, it usually boils down to two things: 1. Obfuscation of host addresses 2. Ability to move an entire topology from one number space to another without reconfiguring the topology. IPv6 solves 1 with privacy addresses. These are horrible and I hope nobody really uses them, but, they're better than NAT. The solution to number 2 depends again on the circumstance. IPv6 offers a variety of tools for this problem, but, I have yet to see an environment where the other tools can't offer a better solution than NAT. Owen
Current thread:
- Re: quietly...., (continued)
- Re: quietly.... Roland Perry (Feb 04)
- Re: quietly.... Lamar Owen (Feb 04)
- Re: quietly.... Derek J. Balling (Feb 04)
- Re: quietly.... Mark Andrews (Feb 04)
- Re: quietly.... Jared Mauch (Feb 04)
- Re: quietly.... Mark Andrews (Feb 04)
- Re: quietly.... Mark Andrews (Feb 04)
- Re: quietly.... Mark Andrews (Feb 02)
- Re: quietly.... Jack Bates (Feb 01)
- Re: quietly.... Karl Auer (Feb 01)
- Re: quietly.... Owen DeLong (Feb 01)
- Re: quietly.... Chris Adams (Feb 01)
- Re: quietly.... Owen DeLong (Feb 01)
- Re: quietly.... Dave Israel (Feb 01)
- Re: quietly.... Jack Bates (Feb 01)
- Re: quietly.... Owen DeLong (Feb 02)
- Re: quietly.... John Payne (Feb 02)
- Re: quietly.... Owen DeLong (Feb 02)
- Re: quietly.... John Payne (Feb 02)
- Re: quietly.... Brian Johnson (Feb 02)
- Re: quietly.... Dave Israel (Feb 02)