Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 998

Complete Software Guide for Junos
Virtual Chassis Ports (VCPs)
Master Role
894
®
OS for EX Series Ethernet Switches, Release 10.4
Chassis features, it is also true that any individual EX4200 switch has some Virtual Chassis
components.
This topic covers:
Virtual Chassis Ports (VCPs) on page 894
Master Role on page 894
Backup Role on page 895
Linecard Role on page 895
Member Switch and Member ID on page 896
Mastership Priority on page 896
Virtual Chassis Identifier (VCID) on page 897
There are two dedicated Virtual Chassis ports (VCPs) on the rear panel of the EX4200
switch that are used exclusively to interconnect EX4200 switches in a Virtual Chassis
configuration. The interfaces for these dedicated ports are operational by default when
the ports are properly cabled. For an example of two EX4200 switches interconnected
with their dedicated VCPs, see "Example: Configuring an EX4200 Virtual Chassis with a
Master and Backup in a Single Wiring Closet" on page 917. In addition, you can interconnect
the switch with another EX4200 switch across a wider distance by installing an optional
SFP, SFP+, or XFP uplink module in an EX4200 switch or by using the network interfaces
in an EX4200-24F switch. To do this using uplink module ports, you need to install one
uplink module in at least one EX4200 switch at each end of the link. You must set the
uplink module ports or the EX4200-24F network interfaces to function as VCPs in order
for the interconnected switches to be recognized as members of the same Virtual Chassis
configuration. This procedure includes setting the uplink module ports or EX4200-24F
network ports of a standalone EX4200 switch as VCPs prior to interconnecting the new
member switch with the existing Virtual Chassis configuration. For an example of EX4200
switches interconnected with the uplink ports functioning as VCPs, see "Example:
Configuring an EX4200 Virtual Chassis Interconnected Across Multiple Wiring Closets"
on page 932.
You can display the status of both the dedicated VCP interfaces and the uplink ports
configured as VCP interfaces with the show virtual-chassis vc-port command.
The member that functions in the master role in an EX4200 Virtual Chassis:
Manages the member switches.
Runs Juniper Networks Junos operating system (Junos OS) for Juniper Networks EX
Series Ethernet Switches in a master role.
Runs the chassis management processes and control protocols.
Represents all the member switches interconnected within the Virtual Chassis
configuration. (The hostname and other properties that you assign to this switch during
setup apply to all members of the Virtual Chassis configuration.)
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