[WinMac] Re: NT suddenly invisible to my Mac
Ari Davidow(ari[at]ivritype.com)
Tue, 5 Jan 1999 14:09:50 -0400
>> For the last few months, I have been comfortably using a printer here
>> at the office, and communicating with NT servers in the office that have
>> Services for the Mac turned on. Then, we moved and changed IP addresses.
>> The Mac, using the new static IP, can see the Internet fine. But I can no
>> longer see the printer or the NT servers, even when I attempt to go to a
>> specific IP address in the Chooser. Did I squash something when I was
>> redoing my Mac TCP/IP settings? Is there something funky going on from
>> the change of IP addresses on the net?
Well, I found the problem, and thought I'd pass it back to the list
because it was rare, unlikely, and fascinating. It wasn't anything
easy like starting and stopping Services for Mac--I'd been there and
done that the first day. It was a "change ISPs don't forget to revisit
multihoming" problem.
As briefly as possible, when we moved, and moved to a new ISP, I
went around and changed the IP addresses of all the machines. This
was done correctly, and everyone was soon up on the new network.
There were two exceptions. First, I didn't change the printer's IP address.
Second, the main server was set to multi-home several IP addresses on the
net, and although I changed the IP addresses of the IIS services using
those IPs, I forgot to change them in the TCP/IP advanced settings.
Somehow, so long as those incorrect settings for TCP/IP remained in effect,
the printer could still be reached as though we were on two, comingled
networks. Yesterday, I finally got around to diagnosing the stopped
IIS services, discovered the IP address conflict, changed settings,
restarted the server (then discovered the printer problems which led
to its own odyssey). Once the addresses were sorted out and everyone
was really on the same network, the Mac had no problem seeing printers
and servers.
In this case, the Mac problem was a symptom of a larger, flakier network
issue, so I guess, if it comes up again, I'll be on the lookout for
NT-TCP/IP-related quirks.
Hope this helps the next victim,
ari
Ari Davidow
ari@ivritype.com
http://www.ivritype.com/
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on Tue Jan 05 1999 - 11:46:22 PST
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