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Configuring Module Redundancy for a Virtual Chassis

By default, a router or switch uses link redundancy for aggregated Ethernet interfaces (bundles) configured with targeted traffic distribution. Starting in Junos OS Release 13.2, as an alternative to using link redundancy, you can configure module redundancy, also known as FPC redundancy, for a Virtual Chassis configured with targeted traffic distribution for IP demux or VLAN demux subscribers on aggregated Ethernet interfaces.

In a Virtual Chassis, module redundancy assigns the primary link and backup link to different MPC/MIC modules or line cards, regardless of the Virtual Chassis role (primary or backup) of the member device in which the module is installed. Module redundancy provides redundancy protection if a module or a link in the Virtual Chassis fails.

Before you begin:

To configure module redundancy:

  1. Log in to the console on the primary device of the Virtual Chassis.
  2. Specify that you want to configure the demux logical interface.
  3. Enable targeted distribution for the interface.
  4. Specify the aggregated Ethernet bundle for which you want to configure module redundancy.
  5. Enable module (FPC) redundancy for the specified aggregated Ethernet bundle.
Best Practice:

We recommend that you do not configure both module (FPC) redundancy and chassis redundancy for the same aggregated Ethernet interface in the Virtual Chassis. If you do, module redundancy takes precedence over chassis redundancy.

Related Documentation

Release History Table
Release
Description
13.2
Starting in Junos OS Release 13.2, as an alternative to using link redundancy, you can configure module redundancy, also known as FPC redundancy, for a Virtual Chassis configured with targeted traffic distribution for IP demux or VLAN demux subscribers on aggregated Ethernet interfaces.