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BGP-4[+] UPDATE Attribute Preprocessor Constants
================================================
This is a list of preprocessor constants that map to BGP attributes defined by
various BGP RFCs. In the code these are defined as BGP_ATTR_<ATTR>.
+-------+------------------+------------------------------------------+
| Value | Attribute | References |
+=======+==================+==========================================+
| 1 | ORIGIN | [RFC 4271] |
| 2 | AS_PATH | [RFC 4271] |
| 3 | NEXT_HOP | [RFC 4271] |
| 4 | MULTI_EXIT_DISC | [RFC 4271] |
| 5 | LOCAL_PREF | [RFC 4271] |
| 6 | ATOMIC_AGGREGATE | [RFC 4271] |
| 7 | AGGREGATOR | [RFC 4271] |
| 8 | COMMUNITIES | [RFC 1997] |
| 9 | ORIGINATOR_ID | [RFC 4456] |
| 10 | CLUSTER_LIST | [RFC 4456] |
| 11 | DPA | [draft-ietf-idr-bgp-dpa-05.txt(expired)] |
| 12 | ADVERTISER | [RFC 1863] |
| 13 | RCID_PATH | [RFC 1863] |
| 14 | MP_REACH_NLRI | [RFC 4760] |
| 15 | MP_UNREACH_NLRI | [RFC 4760] |
| 16 | EXT_COMMUNITIES | [RFC 4360] |
| 17 | AS4_PATH | [RFC 4893] |
| 18 | AS4_AGGREGATOR | [RFC 4893] |
+-------+------------------+------------------------------------------+
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