internet connection in a network randomly crashes

[mark]

hi, i have a laptop and everytime i connect to our network the internet
connect of the whole network will crash for 30 seconds and then the internet
goes back for about 3 minutes then goes out for another 30 seconds. can
anybody help.

 

[Robert L. \(MS-MVP\)]

Have you scanned any virus and spyware? Also any errors when running
nslookup command?

--
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

 

[mark]

hi robert,

i have scanned it with AVG 8.0 and the result was clean.
nslookup showed DNS request timed out, can't find server name and default
servers not available

 

[Robert L. \(MS-MVP\)]

Posting the result of nslookup may help. Or check this troubleshooting;

NslookupNslookup.exe is a tool for testing and troubleshooting DNS servers.
Example. To query for the Chicagotech.net MX record, type the following:
C:\> nslookup . ...
www.chicagotech.net/nslookup.htm


--
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

 

[mark]

hi robert

this is the result of the nslookup:

can't find server name for address 192.168.70.101: non-existent domain
can't find server name for address 203.115.130.8: non-existent domain
default servers are not available
default servers: unknown
address: 192.168.70.101