Juniper JUNOS OS 10.4 - FOR EX REV 1 Manual page 1025

Meaning
Purpose
Action
Meaning
Troubleshooting the Virtual Chassis
Problem
Solution
Copyright © 2010, Juniper Networks, Inc.
The show virtual-chassis status command lists the member switches interconnected
in a Virtual Chassis configuration with the member IDs that have been assigned by the
master, the mastership priority values, and the roles. It also displays the neighbor members
with which each member is interconnected. The output shows that SWA-0, member 0,
has been assigned default mastership priority 128. Because SWA-0 is the first member
to be powered on, it has the most seniority and is therefore assigned the role of master.
SWA-1 is powered on after member 0, so it is assigned the role of backup. The member
IDs are displayed on the front panel of the switches. Check and confirm whether the
default assignment is satisfactory.
Verifying That the VCPs Are Operational
Verify that the dedicated VCPs interconnecting the switches are operational.
Display the VCPs of all the members:
user@SWA-0> show virtual-chassis vc-port all-members
fpc0:
--------------------------------------------------------------------------
Interface Type
or
PIC / Port
vcp-0 Dedicated
vcp-1 Dedicated
fpc1:
--------------------------------------------------------------------------
Interface Type
or
PIC / Port
vcp-0 Dedicated
vcp-1 Dedicated
The show virtual-chassis vc-port command lists the interfaces that are enabled for the
member switches of the Virtual Chassis configuration and shows the status of the
interfaces. The output in this example shows that two of the VCPs are operational and
two VCPs are not. A single cable has been used to interconnect vcp-0 of member ID 0
and vcp-0 of member ID 1. That interconnection is sufficient for the switch to be
operational. However, we recommend that you connect the second set of VCPs for
redundancy.
To troubleshoot the configuration of a Virtual Chassis, perform these tasks:
Troubleshooting the Assignment of Roles
The master and backup roles are not assigned to the member switches that you want
to function in these roles.
Modify the mastership priority values.
Chapter 38: EX4200 Virtual Chassis—Configuration Examples
Status Speed Neighbor
(mbps) ID
Up 32000 1
Up 32000 1
Status Speed Neighbor
(mbps) ID
Up 32000 1
Up 32000 1
Interface
vcp-1
vcp-0
Interface
vcp-0
vcp-1
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