NBNS Name query failure - Why?

[Danckel]

Hi,
I have the following local network problem. I got two computers
connected by an Internet/Router which acts as the DHCP Server and is
called "fritz.box" with fixed IP 192.168.178.1. Both computers run
Windows XP. Computer 1 is called "Inspiron" and gets the IP
192.168.178.20. Compuer 2 gets the IP 192.168.178.21. Until recently
everything worked fine, but now the two computers are unable to
connect (network-browsing).

I observed the following:
ping www.yahoo.com: works fine
ping fritz.box: works fine (fritz.box is the router)
ping inspiron: does not work (inspiron has IP: 192.168.178.20 )
ping 192.168.178.20: works!!!!
nslookup inspiron: works!!???!!! Returns the right IP:
192.168.178.20 .
net view inspiron: does not work (system error 53)
net view 192.168.178.20: works!!!!

Wireshark reports the following network packages exchange following
the command "ping inspiron":

192.168.178.21 192.168.178.1 NBNS Name query NB INSPIRON<00>
192.168.178.1 192.168.178.21 ICMP Destination unreachable (Port
unreachable)

same kind of response about my network "MSHOME"
192.168.178.21 192.168.178.1 NBNS Refresh NB MSHOME<1e>
192.168.178.1 192.168.178.21 ICMP Destination unreachable (Port
unreachable)

"ping fritz.box" returns
192.168.178.21 192.168.178.1 DNS Standard query A fritz.box
192.168.178.1 192.168.178.21 DNS Standard query response A
192.168.178.1
with the subsequent Echo ICMPs

I turned off any firewall.

My question is: which device is at fault and how can I repair it? I
have no idea and would be grateful for any advice

danckel

 

[Danckel]

Found the solution and I think it interesting enough to report it
here:

Cause of the problem: Node type is setup Peer-Peer (reported by
ipconfig /all)

Solution: go to Start | Run | regedit.
Go to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netbt\Parameters

If either of the following values are present, delete them:

NodeType;
DhcpNodeType.
Then re-boot.

Answer found at http://www.chicagotech.net/Networking/nodetypeissue1.htm

I have no idea how the registry entry entered into my system. Would
love to know how and why. Anyway, perhaps it will help some other
victim.

best,
Danckel

 

[Robert L [MVP - Networking]]

Thank you for the feedback. We have found some software may change the node type.

Bob Lin, MS-MVP, MCSE & CNE
Networking, Internet, Routing, VPN Troubleshooting on http://www.ChicagoTech.net
How to Setup Windows, Network, VPN & Remote Access on http://www.HowToNetworking.com
Found the solution and I think it interesting enough to report it
here:

Cause of the problem: Node type is setup Peer-Peer (reported by
ipconfig /all)

Solution: go to Start | Run | regedit.
Go to:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Netbt\Parameters

If either of the following values are present, delete them:

NodeType;
DhcpNodeType.
Then re-boot.

Answer found at http://www.chicagotech.net/Networking/nodetypeissue1.htm

I have no idea how the registry entry entered into my system. Would
love to know how and why. Anyway, perhaps it will help some other
victim.

best,
Danckel