Operation; Precedence Rule And Stickiness Control - Avaya 1110 Fundamentals

Provisioning the IP Phones

Operation

This section describes the automatic provisioning feature operation.

Precedence rule and stickiness control

The Avaya 2007 IP Deskphone, Avaya 1100 Series IP Deskphones, and Avaya 1200 Series
IP Deskphones can obtain provisioning information from many sources at various times. A
precedence rule can resolve the possible conflict when different values are specified in various
sources for one parameter. The 2001 IP Phone, 2002 IP Phone, and 2004 IP Phone do not
support the precedence rule, therefore the phones use the last value received.
Provisioning information from a provisioning source with high priority can overwrite the
provisioning information from a provisioning source with low priority. The manual provisioning
has highest priority. The other provisioning sources are auto-provisioning sources.
Automatic provisioning defines provisioning control for each parameter. You can either
manually or automatically provision each parameter. Each provisioning parameter provides an
attribute that specifies if the parameter was previously provisioned manually or
automatically.
The default value of the stickiness attribute is AUTO. If the provisioning parameter is AUTO,
the IP Phone can receive the value from automatic provisioning sources based on the
precedence rule. If you manually change the parameter, the attribute value is MANUAL. If the
attribute is MANUAL, the provisioning information from automatic provisioning sources is
ignored, except for the standard DHCP parameters. To manually reconfigure the attribute for
an individual parameter or attributes for all parameters to AUTO, use the Set to Factory Default
function.
If you enable DHCP, then the IP address, the subnet mask, the default gateway, which the IP
Phone obtains from the DHCP server, overwrites the manually configured value. The value for
EAP device ID and password can also overwrite the manually configured value.
If you configure stickiness and the current provisioning source does not provide the
provisioning information for the particular parameter, the last received provisioning value is
used.
DHCP precedence overrule capability enables the user to obtain the DSCP values from the
Call Server or from the provisioning info block and to ignore any DSCP values provided by the
LLDP Network Policy TLV. If this feature is enabled the phone ignores any DSCP value
received from the Network Policy TLV. The precedence order for source selection of
provisioning DSCP, from highest priority to lowest priority becomes: manual entry, Info Block
through the provisioning file, Info Block through DHCP, Call Server (for example, Telephony
Manager and Element Manager, or both). If this feature is not enabled then the default
486 IP Deskphones Fundamentals
Comments? infodev@avaya.com
February 2013