Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1129

mastership-priority
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Copyright © 2010, Juniper Networks, Inc.
mastership-priority number ;
[edit virtual-chassis member member-id]
Statement introduced in Junos OS Release 9.0 for EX Series switches.
(On EX4200 Virtual Chassis only) The mastership priority value is the most important
factor in determining the role of the EX4200 member switch within the Virtual Chassis
configuration. Other factors (see "Understanding How the Master in an EX4200 Virtual
Chassis Is Elected" on page 898) also affect the election of the master.
The mastership priority value takes the highest precedence in the master election
algorithm. The member switch with highest mastership priority becomes the master of
the Virtual Chassis configuration. Toggling back and forth between master and backup
status in failover conditions is undesirable, so we recommend that you assign the same
mastership priority value to both the master and the backup. Secondary factors in the
master election algorithm determine which of these two members (that is, the two
members that are assigned the highest mastership priority value) functions as the master
of the Virtual Chassis configuration.
This statement is not used for the EX8200 Virtual Chassis, which determines mastership
by external Routing Engine uptime. See "Understanding Virtual Chassis Roles in an
EX8200 Virtual Chassis" on page 1078.
128
number —Mastership priority value.
Range: 1 through 255
system—To view this statement in the configuration.
system-control—To add this statement to the configuration.
Example: Configuring an EX4200 Virtual Chassis with a Master and Backup in a Single
Wiring Closet on page 917
Example: Configuring an EX4200 Virtual Chassis Interconnected Across Multiple Wiring
Closets on page 932
Configuring an EX4200 Virtual Chassis (CLI Procedure) on page 981
Configuring an EX4200 Virtual Chassis (J-Web Procedure) on page 985
Chapter 42: Configuration Statements for EX4200 Virtual Chassis
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