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Hierarchy Level


Configure Layer 2 control protocols to enable features such as Layer 2 protocol tunneling or nonstop bridging.

You can configure destination MAC address using tunnel-destination-mac <destination mac address>.

The remaining statements are explained separately. See CLI Explorer.


For a detailed description of configuring the nonstop-bridging statement, see the Junos OS High Availability User Guide. When you configure this statement on routing platforms with two Routing Engines, a primary Routing Engine switches over gracefully to a backup Routing Engine and preserves Layer 2 Control Protocol (L2CP) information.

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 8.4.

bpdu-block statement added in Junos OS Release 9.4.

enable-all-if statement added in Junos OS Release 13.3.

Statement introduced in Junos OS Release 14.1X53-D10 for EX4300 switches.

tunnel-destination-mac statement added in Junos OS Evolved Release 21.3R1.