DHCP Lease

[JED2021]

MX250 running DHCP

Our lease for a subnet is 24 hrs

A host was on subnet 1 and has an assignment

I want it moved to subnet 6 via a tagged interface with VLAN6 set to native

It continues to get allocated the VLAN 1 IP address.

can you flush an entry?

[Brash]

As the client has already been given an IP address, it will typically hold onto it until expiration.

It would be up to the client to request a new IP from the DHCP server.

Most operating systems will support this in one way or another but you'll need to log onto the client directly.

Worst case scenario, rebooting the client should also force it to pull a new IP.

[BlakeRichardson]

If you have simply changed to VLAN tagging on the port the client is connected to and have not physically moved the switch port its plugged into then you will need to renew the DHCP lease on the client itself. 

Easiest way would be the restart the device. 

[JED2021]

no

[DarrenOC]

command prompt

ipconfig /renew

[DarrenOC]

Or bounce the switchport that the device is connected to

[JED2021]

no i tried this

[cmr]

@JED2021 are you saying that shutting the switchport that the device is connected to did not get it to ask for a new DHCP address?  If so, then that device is not behaving as it should and needs to be looked at, as opposed to concentrating on the network infrastructure.

[hydr0gen]

Lest this question be forgotten by the sands of time, I propose a possible alternative as to why a new DHCP address isn't being handed out.  Seems it may have to do more with the DHCP lease behavior of the MX250.  Just throwing it out there.

 https://documentation.meraki.com/MX/DHCP/DHCP_Lease_Behavior_Upon_Client_Disconnection