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High Availability

  • GRES-IRB support (PTX10008)—Starting in Junos OS Evolved Release 21.3R1, Graceful Routing Engine Switchover (GRES) is supported, in the existing IRB support, on PTX10008 routers. GRES enables a router with redundant Routing Engines to continue forwarding packets even if one Routing Engine fails. GRES preserves interface and kernel information. Traffic is not interrupted. GRES is supported only on dual Routing Engine platforms. GRES allows you to eliminate network downtime, reduce operating costs, and deliver higher levels of services.

    [See Understanding Graceful Routing Engine Switchover.]

  • NSR support for RSVP-TE dynamic tunnels (PTX10004, PTX10008)—Starting in Junos OS Release 21.3R1, we support NSR for RSVP-TE dynamic tunnels.

    [See Nonstop Active Routing System Requirements.]

  • Support for VRRP functionality (QFX5700)—Starting in Junos OS Evolved Release 21.3R1, the VRRP functionality is supported on QFX5700 switch. The following features are supported as part of this functionality:

        •  Interface: VRRP is supported for physical (ge, xe, et), AE, and IRB interfaces.

        •  Protocol Version: Both V2 and V3 protocols are supported.
        •  IP Type Support: VRRP is supported over both IPv4 and IPv6.
        •  Inheritance: VRRP session inheritance is supported.
        •  Tracking: Both track route and track interface are supported.
        •  Only centralized mode is supported.
        •  Ethernet tagging: Untagged and single tag are supported.
        •  SNMP and OC are supported.

    [See Understanding VRRP.]