topic Re: DHCP Garbage Collection - or lack thereof? in General Topics

DHCP Garbage Collection - or lack thereof?

bporter62 — Wed, 27 Jul 2011 18:37:18 GMT

I may have misunderstood the PAN tech support rep, but I believe he told me about an hour ago that there is no garbage collection routine on expired DHCP leases in PanOS. First of all, did I misunderstand the rep, and if not, how are you handling cleanup of expired DHCP leases? Are you going out and clearing the dhcp leases periodically my manual CLI? Are there scripts out there that would do the cleanup? If so, how do you schedule them to run on PanOS?

Re: DHCP Garbage Collection - or lack thereof?

bporter62 — Wed, 27 Jul 2011 18:38:17 GMT

That should have said by manual CLI

Re: DHCP Garbage Collection - or lack thereof?

pkruse — Mon, 08 Aug 2011 19:42:00 GMT

Hello and thank you for yur question.

The PaloAlto device does not have a garbage script, instead we set the lease time and rely on the client side to renew in accordance with the RFC. The timer begins running as soon as the lease begins so even if your client was to receive an 8 hour lease, logout and walk away for 4 hours they clock is still running. Once the lease has expired the IP will be returned to the pool unless the client side renews the lease.

Thank you,

Phil Kruse