. "This is the path encoded with 4-octet\nAS numbers in the optional transitive AS4_PATH attribute.\nThis value is populated with the received or sent attribute\nin Adj-RIB-In or Adj-RIB-Out, respectively. It should not\nbe populated in Loc-RIB since the Loc-RIB is expected to\nstore the effective AS-Path in the as-path leaf regardless\nof being 4-octet or 2-octet." . "Reference : RFC 6793 - BGP Support for Four-octet AS Number Space" .