Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1136

Complete Software Guide for Junos
role
Syntax
Hierarchy Level
Release Information
Description
Options
1032
®
OS for EX Series Ethernet Switches, Release 10.4
role (line-card | routing-engine);
[edit virtual-chassis preprovisioned member member-id]
Statement introduced in Junos OS Release 9.0 for EX Series switches.
In a preprovisioned EX4200 Virtual Chassis configuration, specify the role to be performed
by each EX4200 member switch. Associate the role permanently with the member's
serial number.
In an EX8200 Virtual Chassis configuration, specify the role to be performed by each
XRE200 External Routing Engine and each EX8200 member switch. Associate the role
permanently with the member's serial number.
(EX4200 Virtual Chassis only) When you use a preprovisioned configuration, you cannot
modify the mastership priority or member ID of member switches through the user
interfaces. The mastership priority value is generated by the software, based on the
assigned role:
A member configured as
A member configured as
A member listed in the preprovisioned configuration without an explicitly specified role
is assigned the mastership priority
The configured role specifications are permanent. If both
a member cannot take over as master of the Virtual Chassis configuration. You
line-card
must delete the preprovisioned configuration to change the specified roles in an EX4200
Virtual Chassis. An EX8200 Virtual Chassis cannot function when both external Routing
Engines which have to be configured in the
Explicitly configure two members as
as members of the preprovisioned Virtual Chassis by specifying only their serial numbers
in an EX4200 Virtual Chassis. If you do not explicitly configure the role of the additional
members, they function in a linecard role by default. In that case, a member that is
functioning in a linecard role can take over mastership if the members functioning as
master and backup (routing-engine role) both fail.
—Enables the member to be eligible to function only in the linecard role. Any
line-card
member of the Virtual Chassis configuration other than the master or backup functions
in the linecard role and runs only a subset of Junos OS for EX Series switches. A member
functioning in the linecard role does not run the control protocols or the chassis
management processes.
An EX4200 Virtual Chassis configuration must have at least three members in order
to include a member that functions in the linecard role.
In an EX8200 Virtual Chassis configuration, all member switches must be in the linecard
role.
routing-engine is assigned the mastership priority
is assigned the mastership priority
line-card
128 .
routing-engine
and configure additional switches
routing-engine
129 .
.
0
members fail,
routing-engine
role have failed.
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