On Mon, Nov 03, 1997 at 11:27:41AM -0700, Yakov Rekhter wrote:
On Mon, Nov 03, 1997 at 01:49:13PM -0500, Sean M. Doran wrote:
One of the ways to make it and renumbering seamless is to understand that IP addresses are subject to change over time and topological distance.
Wel, yes... <sigh>, but as I've noted before, that's an assumption that the current design of the Internet does _not_ require.
Quoting RFC2101 ("IPv4 Address Behavior Today") Section 4.2:
To summarize, since the development and deployment of DHCP and PPP, and since it is expected that renumbering is likely to become a common event, IP address significance has indeed been changed. Spatial uniqueness should be the same, so addresses are still effective locators. Temporal uniqueness is no longer assured. It may be quite short, possibly shorter than a TCP connection time.
Um, the RFC notwithstanding, there are _acres_ of stacks out there that keep track of a connection by an {IPaddr, protocol, port} tuple, and don't expect to have to rewrite any of that during a connection. Can anyone document a stack that _does_ deal correctly with an IP address changing during a connection session? Between sessions sure... but during? Cheers, -- jra -- Jay R. Ashworth jra@baylink.com Member of the Technical Staff Unsolicited Commercial Emailers Sued The Suncoast Freenet "Pedantry. It's not just a job, it's an Tampa Bay, Florida adventure." -- someone on AFU +1 813 790 7592