High Availability

Inline micro-BFD support (QFX5130-32CD, QFX5130E-32CD, QFX5700, and QFX5700E)—You can use inline micro-BFD sessions to monitor the status of individual member links in a LAG bundle. To configure micro-BFD, use the set interfaces interface aggregated-ether-options bfd-liveness-detection configuration command.

The BFD local address is the loopback address of the source of the micro-BFD sessions. Micro-BFD sessions do not support ISSU or authentication.

[See Understanding Independent Micro BFD Sessions for LAG.]

In-service hitless graceful reboot (QFX5220, QFX5230-64CD, QFX5240-64OD, and QFX5240-64QD)—You can perform a hitless graceful reboot to minimize traffic loss and prevent interface flapping. Initiate the reboot with the request system reboot hitless command, or use the request system reboot hitless no-confirm option to bypass prompts. To review reboot details, use the show system software hitless-reboot command. The reboot operation will be canceled if another reboot is pending, upgrade tasks are active, graceful restart is not configured, or application configuration validation fails. Hitless reboot works only for protocols and configurations that are supported by unified in-service software upgrade (unified ISSU).

[See Unified ISSU for Junos OS Evolved.]

Fast Fast Boot-enabled unified ISSU (QFX5130-32CD, QFX5130-48C, QFX5130-48CM, and QFX5130E-32CD)—You can perform unified ISSU on with minimal disruption using Fast Fast Boot (FFB). FFB maintains forwarding with minimal traffic drop and control-plane outage. You can enable unified in-service software upgrade (unified ISSU) with the request system software add package-name restart command.

[See Understanding Unified ISSU.]