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How To Enable Phone-Home Provisioning on a Virtual Chassis


On a Virtual Chassis that supports phone-home provisioning, if you set up the Virtual Chassis according to the steps listed here, a phone-home client (PHC) process starts up automatically on the Virtual Chassis primary member.

To enable phone-home provisioning on a Virtual Chassis:

  1. Ensure that all Virtual Chassis members have the factory-default configuration and are powered off.

    You can run the request system zeroize Junos OS CLI command to return a device to its factory-default state.


    The Virtual Chassis can’t be a mixed-mode Virtual Chassis because mixed mode is never set in the factory-default configuration.

  2. Interconnect the Virtual Chassis members in a ring topology using only dedicated or default-configured Virtual Chassis ports (VCPs) on each member device.

    Keep in mind that the PHC process works only if the Virtual Chassis is initially formed with VCPs that do not need to be explicitly configured (dedicated VCPs or ports that are VCPs in the factory-default configuration). See VCP Options by Switch Type for details on which ports are dedicated and default-configured VCPs on different devices that support Virtual Chassis. See the hardware guide for the device to locate those ports on the device.

  3. Connect the Virtual Chassis management interface (me0) or any network-facing port on any Virtual Chassis member to the network.

    After the PHC starts up on the Virtual Chassis, it uses this connection to access a PHS over the network and retrieve the bootstrapping information for this Virtual Chassis.

    For details about how the management interfaces work on a Virtual Chassis, see Understanding Global Management of a Virtual Chassis.

  4. Power on the members of the Virtual Chassis.

Figure 1 shows an example of a Virtual Chassis topology that can support phone-home provisioning—a four-member EX4300 Virtual Chassis cabled in a ring topology using default-configured VCPs (in this case, two of the 40-Gigabit Ethernet QSFP+ ports on each device).

Figure 1: Sample Virtual Chassis That Can Support Phone-Home Provisioning
Sample Virtual Chassis
That Can Support Phone-Home Provisioning

Usually you don’t need to do anything else for the phone-home provisioning process to proceed and complete successfully. If you don’t see successful completion status or the Virtual Chassis isn’t up and operating as expected at the end of the process, read on to learn details about how the PHC works to help troubleshoot the issues.