2ef2109a_oftware__End_of_Sale_____Cisco_efix_length_Field_Descriptions_Field
[Description] Next hop for the path. If the next hop is known by a mechanism outside BGP (for example, for redistributed paths), then 0.0.0.0 is displayed. After the next hop, the neighbor from whom the path was received is displayed, along with the neighbor’s router-id. If the path was locally generated (for example, an aggregate or redistributed path), then 0.0.0.0 is displayed for the neighbor address. [Field] 
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Cisco ASR 9000 Series Aggregation Services Router Routing Command Reference, Release 4.1 - BGP Commands [Cisco IOS XR Software (End-of-Sale)] - Cisco