Thread: DHCP Lease
View Single Post
  #2  
Old 08-25-2015, 06:41 AM
markgallagher markgallagher is offline
Legend
.
 
Join Date: May 2010
Posts: 578
markgallagher has 25 to 49 reputation pointsmarkgallagher has 25 to 49 reputation pointsmarkgallagher has 25 to 49 reputation pointsmarkgallagher has 25 to 49 reputation points
Default

Just did a quick test and you are correct, the lease time when using the IP Office itself for DHCP is 3 days.

The phone will check its lease halfway through that period and if allowed (ie. the IP Office is still supporting DHCP and the address hasn't been assigned to any other device) will renew the lease. So effectively the lease is checked and extended every one and half days.

The frequent restarts would only be caused by DHCP if for some reason the DHCP signalling was being blocked. But if that were the case then the phone would keep cycling until you statically addressed it. My suspicion would be elsewhere (assuming the IP Office is the only server on the network doing DHCP?). [You can see and track the DHCP leases in IP Office Monitor, and the phone restarts to see if they coincide]

The obvious one with IP Office is that the phones will go through a restart each time the IP Office is restarted (and whilst it is improving a lot of IP Office config changes still require a system restart).
Reply With Quote