Configuring Chassis Redundancy for a Virtual Chassis

By default, the router 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 chassis redundancy for an MX Series Virtual Chassis configured with targeted traffic distribution for IP demux or VLAN demux subscribers on aggregated Ethernet interfaces.

In an MX Series Virtual Chassis, chassis redundancy assigns the backup link to an MPC/MIC module in a member router other than the member router on which the primary link resides. For example, in a two-member MX Series Virtual Chassis where the primary link for the aggregated Ethernet bundle is on an MPC/MIC module in the primary router, chassis redundancy assigns the backup link for the bundle to an MPC/MIC module in the backup router. Chassis redundancy provides protection if the MPC/MIC module containing the primary link fails. In this event, the subscriber connections fail over to the backup link on the MPC/MIC module in the other member router.

Unlike link redundancy and module redundancy, each of which are supported for both standalone routers and Virtual Chassis member routers, chassis redundancy is available only for member routers in an MX Series Virtual Chassis.