Parameter Data Precedence

If a given parameter is administered in multiple places, the last server to provide the parameter has precedence. The precedence, from lowest to highest, is:

1. LLDP,
2. Manual administration, with the two exceptions described for the system parameter STATIC,
3. DHCP, except as indicated in Table 7:  DHCPACK Setting of System Values.
4. HTTP,
5. the Avaya Media Server, and finally,
6. Backup files, if administered and if permitted.

Settings the IP telephone receives from backup files or the media server overwrite any previous settings, including manual settings. The only exception to this sequence is in the case of VLAN IDs. In the case of VLAN IDs, LLDP settings of VLAN IDs are the absolute authority. Then the usual sequence applies through HTTP. If the VLAN ID after HTTP is not zero, any VLAN ID from the media server is ignored.

NOTE: For the L2QVLAN and L2Q system values, LLDP settings of VLAN IDs are the absolute authority only if the LLDP task receives the VLAN IDs before DHCP and HTTP, and the DHCP client of the telephone is activated at all. If the LLDP task receives the VLAN IDs after DHCP negotiation, several criteria must be successful before the telephone accepts VLAN IDs from LLDP. For more information, see Link Layer Discovery Protocol (LLDP).