nanog mailing list archives
Re: IPv4 address length technical design
From: "Fred Baker (fred)" <fred () cisco com>
Date: Sat, 6 Oct 2012 01:06:06 +0000
On Oct 5, 2012, at 4:34 PM, Barry Shein wrote:
Well, XNS (Xerox Networking System from PARC) used basically MAC addresses. Less a demonstration of success than that it has been tried. But it's where ethernet MAC addresses come from, they're just XNS addresses and maybe this has changed but Xerox used to manage the master 802 OUI list and are assigned OUIs 000000...000009. Not insignificant in their effect.
You need a memory refresh. XNS used a three part address: network number, host identifier, and socket number. "Socket" was in essence the TCP/UDP Port Number. the host identifier was as you say a 48 bit number and generally took as its value the MAC address on one of the interfaces - and the same MAC address was used on all interfaces. Hence, no need for ARP/ND. The network number was a 32 bit number assigned to a LAN subnet. A multihomed host essentially implemented ILNP. The issue with the network number was, of course, that it couldn't be aggregated in any useful way. But XNS was not ethernet bridging on a wide scale.
Current thread:
- Re: IPv4 address length technical design, (continued)
- Re: IPv4 address length technical design George Herbert (Oct 04)
- Re: IPv4 address length technical design Jay Ashworth (Oct 04)
- Re: IPv4 address length technical design Barry Shein (Oct 05)
- Re: IPv4 address length technical design Jay Ashworth (Oct 05)
- RE: IPv4 address length technical design nanog (Oct 06)
- Re: IPv4 address length technical design William Herrin (Oct 05)
- RE: IPv4 address length technical design Spurling, Shannon (Oct 05)
- RE: IPv4 address length technical design Siegel, David (Oct 05)
- Re: IPv4 address length technical design John Levine (Oct 05)
- Re: IPv4 address length technical design Barry Shein (Oct 05)
- Re: IPv4 address length technical design Fred Baker (fred) (Oct 05)
- Re: IPv4 address length technical design Cutler James R (Oct 03)
- Re: IPv4 address length technical design William Herrin (Oct 04)
- Re: IPv4 address length technical design Cutler James R (Oct 04)
- Re: IPv4 address length technical design William Herrin (Oct 04)
- Re: IPv4 address length technical design Owen DeLong (Oct 03)
- Re: IPv4 address length technical design George Herbert (Oct 03)
- Re: IPv4 address length technical design Tony Finch (Oct 04)
- Re: IPv4 address length technical design Owen DeLong (Oct 04)
- Re: IPv4 address length technical design Barry Shein (Oct 03)
- Re: IPv4 address length technical design Cutler James R (Oct 03)