Multiple IP addresses, same Netbios name! What's going on?

  • Thread starter Thread starter Saitosan
  • Start date Start date
S

Saitosan

(Please view in fixed width font. It'll look more organized that way.)

I've got a win2k domain with several computers on it, and I'm trying
to track down which computer has a certain netbios name...
Unfortunately, it appears that several computers have the same name,
or at least several ip addresses resolve to the same name. I'll print
out the results of my investigation below, but it seems like some
pretty freaky stuff...

1. nslookup 192.168.100.186 ----> oldlaptop.DOMAIN.COM
2. nslookup 192.168.100.187 ----> oldlaptop.DOMAIN.COM
3. nslookup 192.168.100.188 ----> oldlaptop.DOMAIN.COM

Pinging the above IP Addresses is successful. But another mystery is
below.

4. ping oldlaptop.DOMAIN.COM ----> 192.168.100.199 (no response)
5. ping oldlaptop ----> 192.168.100.199 (no response)
6. ping 192.168.100.199 ----> (no response)
7. nslookup 192.168.100.199 ----> newlaptop.DOMAIN.COM
8. ping newlaptop.DOMAIN.COM ----> resolves to 192.168.100.197
(responds)
9. ping newlaptop ----> resolves to 192.168.100.197
(responds)
10. ping 192.168.100.197 ----> (responds)

So the questions are why do several ip addresses appear to have the
same netbios name (lines 1-3) and why does one IP resolve to a netbios
name that responds with a different IP (lines 7-10)? I know the
newlaptop runs XP Pro, in case this is the behavior of some crazy
internet connection firewall setting...

What do you think?
 
You could find more info in the logs of both old and new laptops and in DNS
log. Open DNS snap-in and ensure Reverse lookup zone for your network
exists. Edit both Reverse and Forward zones. Flush local cache as 'ipconfig
/flushdns'.
 
Jetro said:
You could find more info in the logs of both old and new laptops and in DNS
log. Open DNS snap-in and ensure Reverse lookup zone for your network
exists. Edit both Reverse and Forward zones. Flush local cache as 'ipconfig
/flushdns'.
Click to expand...

I don't know which logs to check, and flushing both local and server
dns with ipconfig did not help. However, manually going into the
reverse zone and deleting a bunch of entries in there seemed to work.
I just assume they'll come back as needed... Thanks for the help
Jetro.

Saito
 
You're welcome.
Wow, the Internet is slowing down from day to day... I've responded on May 7
:o)
 
Back
Top