Problem dhcp roaming within diff networks

[Guest]

Windows 2000 Pro

When I roam through different WiFi networks, i have problems obtaining an ip address. ipconfig /renew -> hangs and then gives error "DHCP server unavailable"

Other computers are getting IP addresses through Cabled of WiFi connections with no problem.

I also assured I am getting a good WiFi link quality.

DHCP servers are broadband NAT boxes ( 2 dlink routers and 1 SMC )
There is no limitation setup on the routers. I.E.: no MAC filtering, no WEP

Ipconfig /all shows the DHCP server to be 255.255.255.0, so it does broadcast to obtain an ip address.

I can obtain an IP address on 1 of the dlink routers after several release/renew commands.

but doesnt work on the other routers
I ensured that the is no configuration problems on the routers.


If someone can give advice it would be much appreciated.

Thanks in advance.

 

[Ace Fekay [MVP]]

In

Windows 2000 Pro

When I roam through different WiFi networks, i have problems
obtaining an ip address. ipconfig /renew -> hangs and then gives
error "DHCP server unavailable"

Other computers are getting IP addresses through Cabled of WiFi
connections with no problem.

I also assured I am getting a good WiFi link quality.

DHCP servers are broadband NAT boxes ( 2 dlink routers and 1 SMC )
There is no limitation setup on the routers. I.E.: no MAC filtering,
no WEP

Ipconfig /all shows the DHCP server to be 255.255.255.0, so it does
broadcast to obtain an ip address.

I can obtain an IP address on 1 of the dlink routers after several
release/renew commands.

but doesnt work on the other routers
I ensured that the is no configuration problems on the routers.


If someone can give advice it would be much appreciated.

Thanks in advance.

What's probably happening is that your are trying to ask a different
DHCPserver to renew an address that was obtained from another.
When in a new area with a different DHCP server, try:

ipconfig /release
ipconfig /renew

The /release will release the previous leased address so you can obtain a
brand new one with the /renew.

--
Regards,
Ace

Please direct all replies ONLY to the Microsoft public newsgroups
so all can benefit.

This posting is provided "AS-IS" with no warranties or guarantees
and confers no rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

HAM AND EGGS: A day's work for a chicken;
A lifetime commitment for a pig.

 

[Guest]

i did before posting

In

What's probably happening is that your are trying to ask a different
DHCPserver to renew an address that was obtained from another.
When in a new area with a different DHCP server, try:

ipconfig /release
ipconfig /renew

The /release will release the previous leased address so you can obtain a
brand new one with the /renew.

--
Regards,
Ace

Please direct all replies ONLY to the Microsoft public newsgroups
so all can benefit.

This posting is provided "AS-IS" with no warranties or guarantees
and confers no rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

HAM AND EGGS: A day's work for a chicken;
A lifetime commitment for a pig.

 

[Ace Fekay [MVP]]

In

i did before posting

I apologize. I mis-read it.

If you can get it after repeatedly releasing and renewing, it seems that the
routers may be overloaded? Just an assumption at this point, unless the
scopes are used up? Otherwise, DHCP should just work, whether its a router
or MS DHCP handling it.

I'm not sure what you mean by this from your post:

Ipconfig /all shows the DHCP server to be
255.255.255.0, so it does broadcast to
obtain an ip address.

A broadcast for DHCP would be on 255.255.255.255 on port 68.

If you can possibly sniff the traffic and see exactly what the client is
doing and what the DHCP responses are during the times it does not work,
that would be beneficial in nailing this down.

--
Regards,
Ace

Please direct all replies ONLY to the Microsoft public newsgroups
so all can benefit.

This posting is provided "AS-IS" with no warranties or guarantees
and confers no rights.

Ace Fekay, MCSE 2000, MCSE+I, MCSA, MCT, MVP
Microsoft Windows MVP - Active Directory

HAM AND EGGS: A day's work for a chicken;
A lifetime commitment for a pig.