IP4 Space

Steven Bellovin smb at cs.columbia.edu
Wed Mar 24 21:44:03 CDT 2010

On Mar 24, 2010, at 10:14 PM, Bill Stewart wrote:

>>> it seems to me that we'll have widespread ipv4 for +10 years at least,
>> How many 10 year old pieces of kit do you have on your network?
>> Ten years ago we were routing appletalk and IPX.  Still doing that now?
> Ten years ago I was still telling a few customers that Novell Netware had
> supported TCP/IP since the early 90s and it was really time to shut off IPX,
> and the Appletalk users were at least running over IP, not LocalTalk,
> so I didn't have to care much, and the Windows people were probably
> already arguing about Active Directory and LDAP and whether to do DNS,
> DLSW was Not Dead Yet, and 1/3 of my X.25 customers acknowledged
> that it was way obsolete and time to join the 1990s (the other two were
> state governments who viewed it as Somebody Else's Emulation Problem.)
> The last time I was dealing with high-end Layer 1 access problems was
> a couple of years ago, but in addition to normal IPv4 and MPLS,
> I had customers running Fiber Channel and other SAN protocols on the WAN.
> There'll be enough IPv4 to keep antiques dealers in business for a while yet.

As of (at least) 2002, the FBI was still using bisync for communications.  If you're a data communications professional and haven't heard of bisync, that proves my point...  I suspect that some members of this list weren't born by the time it was considered obsolete.

		--Steve Bellovin, http://www.cs.columbia.edu/~smb

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