LAN problem

#1
Hello everyone,

I have a small problem, and for the life of me cannot figure it out.
I am doing an internship, and was granted access to the WiFi, which works great.
But for connectivity reasons a connection via an Ethernet cable would be better.
Once I plug in the cable, everything is fine, I get a connection, I can connect with everything inside the network (printers, other pc's, ...) And the network centre says I have internet.
But when I open something on the internet, it takes a while and then goes blank. Its not when you have no internet that it immediately goes blank, it takes a couple of secconds.
I tried everything I could think of (refresh, update network adapters, via cmd console refresh IP/DNS/...) nothing seems to work, any help?

Best regard,
Judge
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#2
Have a look at your ipconfig (Command screen and enter the command: ipconfig /all ). Display the output here if you need help interpreting it.
 


#3
Microsoft Windows [versie 6.1.7601]
Copyright (c) 2009 Microsoft Corporation. Alle rechten voorbehouden.

C:\Users\Mathias Q>cd\

C:\>ipconfig /all

Windows IP-configuratie

Hostnaam . . . . . . . . . . . . : MathiasQ-PC
Primair DNS-achtervoegsel . . . . :
Knooppunttype . . . . . . . . . . : hybride
IP-routering ingeschakeld . . . . : nee
WINS-proxy ingeschakeld . . . . . : nee
DNS-achtervoegselzoeklijst. . . . : INTERSIG.BE

Draadloos LAN-adapter voor Draadloze netwerkverbinding:

Mediumstatus. . . . . . . . . . . : medium ontkoppeld
Verbindingsspec. DNS-achtervoegsel: INTERSIG.BE
Beschrijving. . . . . . . . . . . : Atheros AR5B97 Wireless Network Adapter
Fysiek adres. . . . . . . . . . . : 1C-65-9D-55-3E-59
DHCP ingeschakeld . . . . . . . . : ja
Autom. configuratie ingeschakeld : ja

Ethernet-adapter voor LAN-verbinding:

Verbindingsspec. DNS-achtervoegsel: INTERSIG.BE
Beschrijving. . . . . . . . . . . : Atheros AR8151 PCI-E Gigabit Ethernet Con
troller (NDIS 6.20)
Fysiek adres. . . . . . . . . . . : B8-70-F4-98-A6-9A
DHCP ingeschakeld . . . . . . . . : ja
Autom. configuratie ingeschakeld : ja
Link-local IPv6-adres . . . . . . : fe80::4dfc:5ad7:7518:a46e%11(voorkeur)
IPv4-adres. . . . . . . . . . . . : 192.168.249.81(voorkeur)
Subnetmasker. . . . . . . . . . . : 255.255.252.0
Lease verkregen . . . . . . . . . : donderdag 5 maart 2015 11:04:13
Lease verlopen. . . . . . . . . . : zondag 8 maart 2015 16:20:13
Standaardgateway. . . . . . . . . : 192.168.250.254
DHCP-server . . . . . . . . . . . : 192.168.250.112
DHCPv6 IAID . . . . . . . . . . . : 236745992
DHCPv6-client DUID. . . . . . . . : 00-01-00-01-1B-D1-66-49-B8-70-F4-98-A6-9A

DNS-servers . . . . . . . . . . . : 192.168.250.112
192.168.250.113
NetBIOS via TCPIP . . . . . . . . : ingeschakeld

Tunnel-adapter voor isatap.INTERSIG.BE:

Mediumstatus. . . . . . . . . . . : medium ontkoppeld
Verbindingsspec. DNS-achtervoegsel: INTERSIG.BE
Beschrijving. . . . . . . . . . . : Microsoft ISATAP Adapter
Fysiek adres. . . . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP ingeschakeld . . . . . . . . : nee
Autom. configuratie ingeschakeld : ja

Tunnel-adapter voor Teredo Tunneling Pseudo-Interface:

Mediumstatus. . . . . . . . . . . : medium ontkoppeld
Verbindingsspec. DNS-achtervoegsel:
Beschrijving. . . . . . . . . . . : Teredo Tunneling Pseudo-Interface
Fysiek adres. . . . . . . . . . . : 00-00-00-00-00-00-00-E0
DHCP ingeschakeld . . . . . . . . : nee
Autom. configuratie ingeschakeld : ja

C:\>

Anything particular you need? everything is in dutch so that kinda sucks. I can translate/find if you tell me what you need.
 


Last edited:

patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#4
Try these two commands on the command screen:

ping 192.168.250.112
ping 192.168.250.113
 


#5
No packet loss, but the response times all were >1ms and the min, max and average were 0ms.
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#6
It seems your DNS connection is ok then - try the command

ping yahoo.com

to see if your dns lookup is successful.
 


#7
This is were the problem resides, 4 timeouts, 100% packet loss.
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#8
If the DNS lookups are failing there are two things to try. First try setting the DNS address to the address of the default gateway which is 192.168.250.254. If that does not help try setting your DNS server address to one of the Google public domain name servers, either 8.8.8.8 or 8.8.4.4.
 


#9
When I use the addresses you provided, I don't have an internet connection, when I use auto assign, I shows that I have an internet connection, but when I try to go on the internet, it won't.
Another thing I noticed, I don't if it is relevant, but it can't hurt to mention it.
When I'm on the WiFi, I have internet, when I plug in the ethernet cable and my WiFi is still on, poof,no more internet...
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#10
When I use the addresses you provided, I don't have an internet connection
That is very strange - the DNS server address should not determine whether or not you have a connect - it may determine whether or not a url may be translated to an IP address as that is its purpose but it should not affect whther you actuall connec to the internet. The loss of internet connection on wifi when you connect the wired ethernet cable may be caused by an ip address conflict. Have a look at your ipconfig, inparticular observing the host IP addresses with just one connected and compare it with the situation when both are connected.
 


#11
Everything is the same, except the IP-address, WiFi is 192,168,250,153
LAN is 192.168.250.81
This is probably because all devices in the network get assigned a static IP address.
When I troubleshoot whit the dns servers you provided I always get something about DNS server not responding or something similar. When I troubleshoot with auto assign, it says that the problem cannot be found...
 


patcooke

Microsoft MVP
Staff member
Premium Supporter
Microsoft MVP
#12
Remote debugging is never easy in what I guess is quite a large and complex setup and I suspect there are elements to the network which we are not aware of and you might be best off speaking to someone in networking suport services at your institution.
 


#13
I guessed as much, guess I'll start nagging a little more... Anyway, thanks a lot for your help and quick responses.

Best regards,
Judge
 


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