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    T4000 Router High Availability Features

    High availability features include Routing Engine redundancy, graceful Routing Engine switchover (GRES), nonstop active routing (NSR), graceful restart for routing protocols, and unified in-service software upgrade (ISSU).

    Note: For more information about high availability feature requirements and limitations, see the Junos OS High Availability Library for Routing Devices.

    Table 1: High Availability Features Supported in T4000 Routers





    Standalone T4000 router

    12.1R2 and later

    12.1R2 and later

    13.2 and later

    T4000 LCC in a TX Matrix Plus routing matrix with 3D SIBs

    13.1 and later

    13.1 and later

    14.1 and later

    Published: 2014-04-30