Multilple leases with same client identifier

[Simon Hobson]

Christian Kratzer wrote:

>We have one specific device that sends identical ethernet addresses 
>and uid for all the requests the different vlans.
>
>When the device requests 3 leases one for each vlan it is on. The 
>DHCP server releases the previously assigned leases as it assumes 
>that the device has moved to a another network.

That's not default behaviour - do you have (IIRC) 
one-lease-per-client turned on ?

AFAIK it's valid to use the same MAC address and ClientID on multiple 
VLANs - if you think about it, if it is just different VLANs then the 
ethernet interface is the same (so same MAC) and there's no reason 
for the ClientID to vary.

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Simon Hobson

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