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    T640 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 T640 Routers






    7.0 and later

    8.4 and later

    9.0 and later

    T640 LCC in a TX Matrix routing matrix

    7.0 and later

    8.4 and later

    9.3 and later

    Published: 2014-04-30