goose DHCP clients to new address Was: DHCP Problem

[Geert Stappers <stappers@stappers.nl>]

On Sun, Dec 03, 2023 at 12:30:53PM -0700, Charles Curley wrote:
> I am installing a new router which seems to work well so far.
 
I assume that the previous router is disconnected from the LAN.


> I have changed the DHCP server to use the new router's address, and shut
> the server down and restarted it. Existing clients insist on using the
> old router anyway. Is there any way to goose clients into using the new
> one short of manually using the ip route command?

The DHCProtocol has "release" for such goosing.
At DHCPclient do "stop DHCP", over the wire goes DHCPRELEASE [0]
The DHCPclient should forget ( "release" ) previous settings.
At DHCPclient do "start DHCP", client should get fresh config,
including the setting for the fresh router.


If that is already done, provide information to enable further help.
Such as name of the DHCP client program  and DHCP lease time.

Oh, DHCP lease time:  What lease time is the DHCP server providing?


Groeten
Geert Stappers

[0] https://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol#DHCP_message_types
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