3 weeks ago
We have Avaya IP phones for which we use LLDP in a Cisco switch to provide the voice VLAN ID to the phone. Unfortunately, when the phones boot up, they first try DHCP on the data VLAN (untagged). We need to deny offering a lease if the requesting device is a phone. Once LLDP succeeds, the phones will try DHCP on the voice VLAN, succeed, and go on from there.
We've defined an IPv4 filter based on the existing fingerprint for "Avaya IP phone". So far, so good.
We can apply that filter, with an action of "deny lease" to one or more DHCP data subnet scopes and it works as desired.
We have not found a way to apply it to existing network containers. In IPAM, when editing a container, IPv4 Filters offers the Logic Filter List. The only filters that are available are class-based ones.
What are we missing? Or is there a better approach?