Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?


nonstop-bridging (Ethernet Switching)


Hierarchy Level


For switches with two Routing Engines or for Virtual Chassis, configure a primary Routing Engine to switch over gracefully to a backup Routing Engine and preserve Layer 2 protocol information for the Layer 2 protocols that support nonstop bridging (NSB). For a list of the EX Series switches and Layer 2 protocols that support nonstop bridging, see EX Series Switch Software Features Overview.

Required Privilege Level

interface—To view this statement in the configuration.

interface-control—To add this statement to the configuration.

Release Information

Statement introduced in Junos OS Release 11.3.