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TCP/IP problem

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7 replies

by ragavansarma

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Our Company is running NT Server4.0 with DNS,WINS & DHCP.Recently a client Workstation was removed from the network which had a static IP & it's name was abc(say).
We installed a cisco router for RAS & assigned the same IP address that was used by the discontinued computer.
Every thing worked fine BUT, when I try to ping the router's IP it resolves along with the old computer name.(I use ping -a x.y.z.81).
Where should I check this old entry?
Any ideas pleas!!!

7 replies

by sfo farmer

Have you deleted the record in WINS and DNS?

You may need to tombstone the host name from wins...

do a nslookup on the ip address(reverse lookup) or by name and see if the host name shows up- if it does delete in DNS

If its not there and it's still pingable- most likey it is still in the WINS database.

G' Luck SFO

by mckaytech

I think it's most likely a stale WINS entry. Go to WINS manager, click on Mappings, then Show Database. Set the filter to either the name or the IP address and see what shows up. In particular, if there is a check in the S column, it means that was a static entry and will have to be deleted on the server that owns it (if you have multiple WINS servers).

You'll also want to make sure that the IP address is outside the scope of the DHCP leases or that it has a reservation.

If that hasn'tsolve the problem, then it's either DNS or an LMHOSTS file and you'll want to look at those possibilities.

But I'd bet on the WINS....

paul

by shepherr

Everyone has offered some of the obvious suggestions. One thing to remember though, is that the HOSTS file in c:\winnt\system32\drivers\etc could still have an entry in it as well.

What I'd check in order is:

DNS, WINS, HOSTS, LMHOSTS

DNS and WINS are obvious, but people forget that your server still needs to know where these IPs are.

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