2ef2109a_oftware__End_of_Sale_____Cisco_efix_length_Field_Descriptions_Field
[Description] Autonomous system (AS) path that was received for the path. If the AS path is empty, then “Local” is displayed. This is the case for paths that are locally generated on this router or on a neighboring router within the same AS. [Field] 
AS Path
Cisco ASR 9000 Series Aggregation Services Router Routing Command Reference, Release 4.1 - BGP Commands [Cisco IOS XR Software (End-of-Sale)] - Cisco