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Hierarchy Level


Use to enable a BGP peer that uses a 4-Byte to interact with another BGP peer old speaker that uses 2-Byte.


We recommend that you configure disable-4byte-as only if the BGP peer does not support or ignores the capability advertisement of 4byte-as, and brings up the session as a 2byte AS.

Required Privilege Level

routing—To view this statement in the configuration.

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

Release Information

Statement introduced before Junos OS Release 19.3.