The value of tbgp4PathAttrASPathSegment indicates the sequence of Autonomous System (AS) path segments. Each AS path segment is represented by a triple <type, length, value>. The type is a 1-octet field which has two possible values: 1 AS_SET: unordered set of ASs a route in the UPDATE message has traversed 2 AS_SEQUENCE: ordered set of ASs a route in the UPDATE message has traversed. The length is a 1-octet field containing the number of ASs in the value field. The value field contains one or more 4-byte AS numbers. Each AS is represented in the octet string as four octets.
Sources for this description
Multiple manufacturers; see the original MIB MIB copies (LibreNMS/Observium Community)Netdisco MIB archive copiesNokia networking MIB copies (LibreNMS/Observium Community)