Administrator Guide

Audio Visual Bridging Commands 1138
All IEEE 802.1AS interfaces must reside on the same stack member.
Propagation of timing information across a stack is not supported.
IEEE 802.1AS must also be enabled globally as well as on an interface to
become operational.
Command History
Introduced in version 6.2.0.1 firmware.
Example
console(config)#interface gi1/0/1
console(config-if-Gi1/0/1)#dot1as
dot1as priority
Use this command to globally configure the priority 1 or priority 2 value. Use
the no form of the command to return the priority value to the default.
Syntax
dot1as priority [ 1 | 2 ] [ priority-value]
no dot1as priority [ 1 | 2 ]
• priority [ 1 | 2 ] — Selects the priority value to configure. Priority 1 and 2
are used in the selection of the grand master clock.
Default Configuration
By default, priority 1 is 246 and priority 2 is 248.
Command Mode
Global Configuration
User Guidelines
The best master clock algorithm considers the priority1 attribute before any
other attributes; therefore, the priority1 attribute can be used to force a
desired ordering of time-aware end stations with respect to best master clock
selection.
IEEE 802.1AS must also be enabled globally as well as on an interface to
become operational.