Juniper JUNOS OS 10.3 - SOFTWARE Manual page 1118

Complete Software Guide for Junos
Configuring Mastership Using a Configuration File That Is Not Preprovisioned
Related
Documentation
1022
®
OS for EX Series Ethernet Switches, Release 10.3
NOTE: You cannot directly modify the mastership priority value when you
are using a preprovisioned configuration. The mastership priority values
are generated automatically and controlled by the role that is assigned
to the member switch in the configuration file. The two members assigned
the routing-engine role are assigned the same mastership priority value
( 128 ). However, the member that was powered on first has higher
prioritization according to the master election algorithm. See
"Understanding How the Master in a Virtual Chassis Configuration Is
Elected" on page 928. Only two members can be specified with the
routing-engine
List the serial numbers of any other member switches that you want to include in the
5.
Virtual Chassis configuration. You may also specify their role as
To configure mastership of the Virtual Chassis through a configuration that is not
preprovisioned:
Power on only the switch that you want to function in the master role (SWA-0).
1.
Configure the highest possible mastership priority value (
2.
you want to function in the master role:
[edit virtual-chassis]
user@SWA-0# set member 0 mastership-priority 255
Configure the same mastership priority value (continue to edit the Virtual Chassis
3.
configuration on the master) for the member that you want to be the backup (SWA-1):
[edit virtual-chassis]
user@SWA-0# set member 1 mastership-priority 255
NOTE: We recommend that the master and backup have the same
mastership priority value to prevent the master and backup status from
switching back and forth between master and backup members in failover
conditions.
Use the default mastership priority value (
4.
or configure the mastership priority to a value that is lower than the value specified
for members functioning in the master and backup roles.
Example: Configuring a Virtual Chassis Using a Preprovisioned Configuration File on
page 982
Example: Expanding a Virtual Chassis Configuration in a Single Wiring Closet on page 952
role.
) for the remaining member switches
128
Copyright © 2010, Juniper Networks, Inc.
linecard , if desired.
) for the member that
255