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Can obtain IP Address from DHCP , but cannot ping anything

 
 
Staunts
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      4th Jul 2006
Hi all,

I have a laptop that could always be plugged into our domain and obtain
an ip via dhcp. You could then browse, ping etc etc. I have a
wireless/wired network at home. If I go home I can use both the wired
and wireless network.

But when I come into the office and plug the lapop into our switch I
"seem" to get connected, i.e. I obtain the correct ipaddress via dhcp
but that's about it. I cannot ping ipaddresses or hostnames from the
laptop, I also cannot ping the laptop from the server that gave out the
ipaddress thru dhcp.

I have tried using the netsh utility and I have also tried deleting the
lan card and reinstalling - all to no avail.

can anyone help me get this thing going ?

cheers,

Adam

 
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=?Utf-8?B?S2FzcmEgQmVoYmFoYW5p?=
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      5th Jul 2006
Hi Adam,

This may cause because of 2 different reasones:

1. Network Cable Cat5 or Cat6 could not be more than 92 meter long. when
longer cables get connected to LAN NIC Card, UDP packets could be sent and
receive some times, and that's why you can get IP address from DHCP Server.
but TCP Packets could not be transfered using Switches or Hubs. that's why
you can not send and receive data.

2. because Ping command is using UDP, and you still couldn't ping other
computers, it seams that your network cable was not standard. look at the
socket of the cable that you are plugging into your laptop computer, there
are 8 wires, they should be placed correctly, sometimes testers may pass but
still old LAN NIC Cards could not connect.

"Staunts" wrote:

> Hi all,
>
> I have a laptop that could always be plugged into our domain and obtain
> an ip via dhcp. You could then browse, ping etc etc. I have a
> wireless/wired network at home. If I go home I can use both the wired
> and wireless network.
>
> But when I come into the office and plug the lapop into our switch I
> "seem" to get connected, i.e. I obtain the correct ipaddress via dhcp
> but that's about it. I cannot ping ipaddresses or hostnames from the
> laptop, I also cannot ping the laptop from the server that gave out the
> ipaddress thru dhcp.
>
> I have tried using the netsh utility and I have also tried deleting the
> lan card and reinstalling - all to no avail.
>
> can anyone help me get this thing going ?
>
> cheers,
>
> Adam
>
>

 
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