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Ç¥ÁعøÈ£ TTAE.IF-RFC6793 ±¸Ç¥ÁعøÈ£
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ÇѱÛÇ¥Áظí 4 ¿ÁÅÝ ÀÚÀ² ½Ã½ºÅÛ(AS) ¹øÈ£ °ø°£À» À§ÇÑ BGP Áö¿ø
¿µ¹®Ç¥Áظí BGP Support for Four-Octet Autonomous System (AS) Number Space
Çѱ۳»¿ë¿ä¾à ¡®NEW BGP¡¯ ½ºÇÇÄ¿´Â 4-¿ÁÅÝ AS ¹øÈ£¸¦ Áö¿øÇÔÀ» ÀÌ¿ôµé¿¡°Ô ¾Ë¸®±â À§Çؼ­ BGP CA(Capabilities Advertisement)¸¦ »ç¿ëÇÑ´Ù. º» ¹®¼­´Â ¡®OLD BGP¡¯ ½ºÇÇÄ¿¸¦ ÅëÇØ 4-¿ÁÅÝ AS ¹øÈ£°¡ Æ÷ÇÔµÈ AS °æ·Î Á¤º¸¸¦ º¸³¾ ¼ö ÀÖµµ·Ï ¼±ÅÃÀû Àüȯ(optional transitive) ¼Ó¼ºÀÎ AS4_PATH ¼Ó¼ºÀ» Á¤ÀÇÇÑ´Ù. ÀÌ¿Ü¿¡µµ ¼±ÅÃÀû Àüȯ AS4_AGGREGATOR ¼Ó¼ºµµ Á¤ÀÇÇÑ´Ù. ¡®NEW BGP¡¯ ½ºÇÇÄ¿ °£ »óÈ£µ¿ÀÛ°ú ¡®NEW BGP¡¯ ½ºÇÇÄ¿¿Í ¡®OLD BGP¡¯ ½ºÇÇÄ¿ °£ »óÈ£µ¿ÀÛÀ¸·Î ±¸ºÐÇؼ­ ±â¼úÇÑ´Ù. ¡®NEW BGP¡¯ ½ºÇÇÄ¿ °£ »óÈ£ µ¿ÀÛ¿¡¼­´Â ¡®NEW BGP¡¯ ½ºÇÇÄ¿°¡ BGP CA¸¦ »ç¿ëÇؼ­ Åë½Å »ó´ë(peer)¿¡°Ô ±¤°íÇÏ°í »ó´ë Åë½Å »ó´ë(Peer)·ÎºÎÅ͵µ µ¿ÀÏÇÑ ±â´ÉÀ» ¼ö½ÅÇϸé AS_PATH ¼Ó¼º°ú AS_AGGREGATOR ¼Ó¼º¿¡ 4-¿ÁÅÝ AS ¹øÈ£¸¦ Æ÷ÇÔ½ÃÄѼ­ º¸³½´Ù. ¡®NEW BGP¡¯ ½ºÇÇÄ¿¿Í ¡®OLD BGP¡¯ ½ºÇÇÄ¿ °£ »óÈ£ µ¿ÀÛÀº ¡®NEW BGP¡¯ ½ºÇÇÄ¿°¡ 2-¿ÁÅÝ AS ¹øÈ£¸¦ °®°í ÀÖÀ» ¶§¸¸ °¡´ÉÇÏ´Ù. ¡®NEW BGP¡¯ ½ºÇÇÄ¿°¡ ¡®OLD BGP¡¯ ½ºÇÇÄ¿¿Í Åë½ÅÇÏ´Â °æ¿ì 2-¿ÁÅÝ AS ¹øÈ£¸¦ »ç¿ëÇØ¾ß Çϸç AS4_PATH ¼Ó¼º¿¡ AS °æ·Î Á¤º¸¸¦ Æ÷ÇÔ½ÃŲ´Ù.
¿µ¹®³»¿ë¿ä¾à A NEW BGP Speaker uses the BGP Capabilities Advertisement to advertise to its neighbors that it supports four-octet AS number extensions. To preserve the AS path information with four-octet AS numbers across OLD BGP speakers, this document defines the optional transitive AS4_PATH attribute. Also, the optional transitive AS4_AGGREGATOR attribute is defined. The operation is described for the cases of the interaction between NEW BGP speakers and the interaction between NEW and OLD BGP speakers. In the interaction between NEW BGP speakers, a NEW BGP speaker shall advertise its capability to its peers using BGP Capabilities Advertisements and, if it receives from that peer the advertisement of such a capability, it MUST encode four-octet AS numbers in the AS_PATH attribute and the AGGREGATOR attribute. In the interaction between NEW and OLD BGP speakers, peering between a NEW BGP speaker and an OLD BGP speaker is possible only if the NEW BGP speaker has a two-octet AS number. When communicating with an OLD BGP speaker, a NEW BGP speaker MUST use two-octet AS numbers and include the AS path information in the AS4_PATH attribute.
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°ü·ÃÆÄÀÏ TTAE.IF-RFC6793_[1].pdf TTAE.IF-RFC6793_[1].pdf            

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