Wireless Laptops and DHCP

To the newsgroup:



Currently, a client has 5 laptops on an 802.11g network. We've noticed
slight delays at times when passing off from one WAP to another in the
building and the issue appears to be that a new IP address is requested from
the server and there is a DHCP error. At first, the DHCP server (the Small
Business Server 2000) does not give out an IP address but then the server
does. And you notice the lag time.



To test, I've manually set the IP addresses on 3 laptops, still connecting
wirelessly and the delays disappear, and this makes sense, less DHCP errors.
The DNS server is still 192.168.16.2, my IP forwarders are correct on the
server.



I am going to set the DHCP server on to Auto again so the client can go to
their hotspots.



Is there a way to reduce this delay on either the client or server?



Here is the typical error:







Your computer was not able to renew its address from the network (from the
DHCP Server) for the Network Card with network address xxxxxxxxxxxxx. The
following error occurred:

The operation was canceled by the user. . Your computer will continue to try
and obtain an address on its own from the network address (DHCP) server.



Your tips would be appreciated.

Smith

Kevin
Sat Nov 06 15:05:08 CST 2004

no ideas on the issue at hand, but if setting the laptops to fixed IP
addresses resolves the problem, then maybe you should look into te
MultiNetworkManager (globesoft.com) for your laptops. This should allow you
to define to different network setups for these laptops - one when they are
in the office and need their fixed ip addr, and another when they are on the
road using a hotspot and need a dhcp ip address to be handed out to them.

--
Kevin Weilbacher [SBS-MVP]

"The days pass by so quickly now, the nights are seldom long"
"Smith" <Smith@donotreply.org> wrote in message
news:A09jd.87490$bk1.53996@fed1read05...
> To the newsgroup:
>
>
>
> Currently, a client has 5 laptops on an 802.11g network. We've noticed
> slight delays at times when passing off from one WAP to another in the
> building and the issue appears to be that a new IP address is requested
> from the server and there is a DHCP error. At first, the DHCP server (the
> Small Business Server 2000) does not give out an IP address but then the
> server does. And you notice the lag time.
>
>
>
> To test, I've manually set the IP addresses on 3 laptops, still connecting
> wirelessly and the delays disappear, and this makes sense, less DHCP
> errors. The DNS server is still 192.168.16.2, my IP forwarders are correct
> on the server.
>
>
>
> I am going to set the DHCP server on to Auto again so the client can go to
> their hotspots.
>
>
>
> Is there a way to reduce this delay on either the client or server?
>
>
>
> Here is the typical error:
>
>
>
>
>
>
>
> Your computer was not able to renew its address from the network (from the
> DHCP Server) for the Network Card with network address xxxxxxxxxxxxx. The
> following error occurred:
>
> The operation was canceled by the user. . Your computer will continue to
> try and obtain an address on its own from the network address (DHCP)
> server.
>
>
>
> Your tips would be appreciated.
>
> Smith
>
>
>
>

Henry
Sat Nov 06 15:34:37 CST 2004

If you're running Wireless LAN Internally on the SBServer and not
connecting having the AP External and using VPN into the Domain, then
I'd definitely be using Fixed IP Addresses with reservations on both the
server and the APs.

--
Henry Craven {SBS-MVP}
Melbourne Australia

"Smith" <Smith@donotreply.org> wrote in message
news:A09jd.87490$bk1.53996@fed1read05...
> To the newsgroup:
>
>
>
> Currently, a client has 5 laptops on an 802.11g network. We've noticed
> slight delays at times when passing off from one WAP to another in the
> building and the issue appears to be that a new IP address is
requested from
> the server and there is a DHCP error. At first, the DHCP server (the
Small
> Business Server 2000) does not give out an IP address but then the
server
> does. And you notice the lag time.
>
>
>
> To test, I've manually set the IP addresses on 3 laptops, still
connecting
> wirelessly and the delays disappear, and this makes sense, less DHCP
errors.
> The DNS server is still 192.168.16.2, my IP forwarders are correct on
the
> server.
>
>
>
> I am going to set the DHCP server on to Auto again so the client can
go to
> their hotspots.
>
>
>
> Is there a way to reduce this delay on either the client or server?
>
>
>
> Here is the typical error:
>
>
>
>
>
>
>
> Your computer was not able to renew its address from the network (from
the
> DHCP Server) for the Network Card with network address xxxxxxxxxxxxx.
The
> following error occurred:
>
> The operation was canceled by the user. . Your computer will continue
to try
> and obtain an address on its own from the network address (DHCP)
server.
>
>
>
> Your tips would be appreciated.
>
> Smith

JohnMcCoy
Wed Nov 10 19:45:02 CST 2004

Have you updated the NIC card drivers?

It is just a thought

"Smith" wrote:

> To the newsgroup:
>
>
>
> Currently, a client has 5 laptops on an 802.11g network. We've noticed
> slight delays at times when passing off from one WAP to another in the
> building and the issue appears to be that a new IP address is requested from
> the server and there is a DHCP error. At first, the DHCP server (the Small
> Business Server 2000) does not give out an IP address but then the server
> does. And you notice the lag time.
>
>
>
> To test, I've manually set the IP addresses on 3 laptops, still connecting
> wirelessly and the delays disappear, and this makes sense, less DHCP errors.
> The DNS server is still 192.168.16.2, my IP forwarders are correct on the
> server.
>
>
>
> I am going to set the DHCP server on to Auto again so the client can go to
> their hotspots.
>
>
>
> Is there a way to reduce this delay on either the client or server?
>
>
>
> Here is the typical error:
>
>
>
>
>
>
>
> Your computer was not able to renew its address from the network (from the
> DHCP Server) for the Network Card with network address xxxxxxxxxxxxx. The
> following error occurred:
>
> The operation was canceled by the user. . Your computer will continue to try
> and obtain an address on its own from the network address (DHCP) server.
>
>
>
> Your tips would be appreciated.
>
> Smith
>
>
>
>
>

Smith
Fri Dec 03 22:04:12 CST 2004

Yes, most definitely. First thing we do. We found out that on some HP
laptops, we had to roll back the NIC drivers for SP2 compatibility. And
these were new HP Centrino Laptops. Very odd.

Smith

"John McCoy" <JohnMcCoy@discussions.microsoft.com> wrote in message
news:A65F800D-D8DA-4724-A4CB-D8F027014523@microsoft.com...
> Have you updated the NIC card drivers?
>
> It is just a thought
>
> "Smith" wrote:
>
>> To the newsgroup:
>>
>>
>>
>> Currently, a client has 5 laptops on an 802.11g network. We've noticed
>> slight delays at times when passing off from one WAP to another in the
>> building and the issue appears to be that a new IP address is requested
>> from
>> the server and there is a DHCP error. At first, the DHCP server (the
>> Small
>> Business Server 2000) does not give out an IP address but then the server
>> does. And you notice the lag time.
>>
>>
>>
>> To test, I've manually set the IP addresses on 3 laptops, still
>> connecting
>> wirelessly and the delays disappear, and this makes sense, less DHCP
>> errors.
>> The DNS server is still 192.168.16.2, my IP forwarders are correct on the
>> server.
>>
>>
>>
>> I am going to set the DHCP server on to Auto again so the client can go
>> to
>> their hotspots.
>>
>>
>>
>> Is there a way to reduce this delay on either the client or server?
>>
>>
>>
>> Here is the typical error:
>>
>>
>>
>>
>>
>>
>>
>> Your computer was not able to renew its address from the network (from
>> the
>> DHCP Server) for the Network Card with network address xxxxxxxxxxxxx. The
>> following error occurred:
>>
>> The operation was canceled by the user. . Your computer will continue to
>> try
>> and obtain an address on its own from the network address (DHCP) server.
>>
>>
>>
>> Your tips would be appreciated.
>>
>> Smith
>>
>>
>>
>>
>>