Troubleshooting Virtual Chassis Port Connectivity On An Ex4200 Switch; Virtual Chassis Port (Vcp) Connection Does Not Work - Juniper EX4200 Hardware Manual

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Symptoms: When you check the status with the CLI command show interfaces ge or with the J-Web user
interface, the disabled port is not listed.
Cause
By default, the SFP+ and SFP+ MACsec uplink modules operate in the 10-gigabit mode and support only
SFP+ transceivers. The operating mode for the module is incorrectly set.
Solution
Either SFP+ or SFP transceivers can be installed in the uplink modules. You must configure the operating
mode of the SFP+ or SFP+ MACsec uplink module to match the type of transceiver you want to use. For
SFP+ transceivers, configure the 10-gigabit operating mode and for SFP transceivers, configure the 1-gigabit
operating mode. See Setting the Mode on an SFP+ or SFP+ MACSec Uplink Module .

Troubleshooting Virtual Chassis Port Connectivity on an EX4200 Switch

This topic provides troubleshooting information for specific problems related to uplink module ports on
EX4200 switches.

Virtual Chassis port (VCP) connection does not work | 247

1.
Virtual Chassis port (VCP) connection does not work
Problem
Description: The Virtual Chassis port (VCP) connection configured in an EX4200 switch does not work.
Environment: A port of the uplink module is set as a VCP.
Cause
The uplink module installed in the switch was replaced.
Solution
Set a port in the uplink module as a VCP. See Setting an Uplink Port on an EX Series or QFX Series Switch as
a Virtual Chassis Port.