Dhcp not updating lease

The wifi and Net Motion connections employ Infoblox DHCP scopes to obtain their IP and network settings (the Verizon connections are managed separately via a private IP setup with Verizon, and don't come into play in this issue).

The wifi scope has a lease length of 8 days; the Net Motion client scope has a lease length of 2 hours.

If the lease expires, the client must immediately discontinue its use of the current IP address.

The DHCP client then begins the DHCP lease discovery process in an attempt to lease a new IP address.

[j] DHCP client sends a DHCPREQUEST packet 2J DHCP Serverl sends a DHC PACK packet Definitions Purpose of the DHCP lease renewal process Lease period ILLEGAL FOR NON-TRAINER USE The DHCP lease renewal process is the process by which the DHCP client renews or updates its IP address configuration data with the DHCP server.

The DHCP client renews its IP configuration data prior to the expiration of the lease time.

We have a set of mobile PCs which connect via Verizon when in the field, but via wifi when the vehicles in which they are mounted drive into the facility.

Having DHCP maintain this information means that you can manage IP addressing from the DHCP server.

Seems to me it would work if we disabled DDNS updates for the wifi scope - but we would have to figure out how to move those devices to a different scope - which would involve a lot of AP config etc.

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The thought process was that yes once every 4 days, the wifi lease would expire and yes, DNS might get updated to the wifi IP temporarily, but within an hour at most, the Net Motion lease would expire/renew, and the IP would be updated back to the Net Motion IP for the device.

We could live with that max 1 hour/avg 1/2 hour window of the "wrong" IP in DNS. Are there priorities negotiated between the scopes in terms of DDNS updates, which one "wins"?

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