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Ç¥ÁعøÈ£ TTAE.IF-RFC6264 ±¸Ç¥ÁعøÈ£
Á¦°³Á¤ÀÏ 2014-12-17 ÃÑÆäÀÌÁö 26
ÇѱÛÇ¥Áظí IPv6 ÀüȯÀ»À§ÇÑ Á¡ÁøÀû ij¸®¾î±Þ NAT
¿µ¹®Ç¥Áظí An Incremental Carrier-Grade NAT (CGN) for IPv6 Transition
Çѱ۳»¿ë¿ä¾à ±Û·Î¹ú IPv6 È®»êÀº ¿¹»óº¸´Ù ´À¸®°Ô ÁøÇàµÇ¾ú´Ù. IPv4 ÁÖ¼Ò °í°¥ÀÌ ´Ù°¡¿È¿¡ µû¶ó, IPv4¿¡¼­ IPv6·ÎÀÇ Àüȯ ¹®Á¦°¡ ´õ Áß¿äÇØÁ³°í, ´Ù·ç±â ¾î·Á¿î À̽´°¡ µÇ°í ÀÖ´Ù. µà¾ó ½ºÅà ȯ°æ¿¡¼­ »ç¿ëµÇ´Â È£½ºÆ® ±â¹Ý Àüȯ ¸ÞÄ¿´ÏÁòÀ¸·Î´Â ¸ðµç Àüȯ ¿ä±¸ »çÇ×À» ÃæÁ· ÇÒ ¼ö ¾ø´Ù. ´ëºÎºÐÀÇ ¿£µå »ç¿ëÀÚ°¡ È£½ºÆ® ±â¹Ý º¯È¯ ¸ÞÄ¿´ÏÁòÀ» ±¸¼ºÇϰųª À¯ÁöÇÒ Á¤µµÀÇ ÃæºÐÇÑ Àü¹®°¡°¡ ¾Æ´Ï´Ù. ÅëÇÕ Àüȯ ¸ÞÄ¿´ÏÁòÀ» °®´Â ÁõºÐ ij¸®¾î±Þ NAT ÀåÄ¡°¡ IPv4¿¡¼­ IPv6·ÎÀÇ ÀüȯµÉ ¶§±îÁö ȤÀº °øÁ¸ÇÏ´Â ±â°£ µ¿¾È ¿î¿µ Ãø¸é¿¡¼­ÀÇ º¯È­¸¦ ÁÙÀÏ ¼ö ÀÖ´Ù.
ÀÌ ¹®¼­´Â IPv6 ÀüȯÀ» À§ÇÑ Á¡ÁøÀûÀΠij¸®¾î±Þ NAT ±â¹ýÀ» Á¦¾ÈÇÑ´Ù. ÀÌ ±â¹ýÀ» ÅëÇØ IPv4/IPv6 ÀüÈ­ ÃÊ±â ´Ü°è µ¿¾È ·¹°Å½Ã ISP ³×Æ®¿öÅ©¸¦ À¯Áö½ÃÅ°¸é¼­ IPv6 È£½ºÆ®¿¡°Ô IPv6 ¾×¼¼½º ¼­ºñ½º¸¦ IPv4 È£½ºÆ®¿¡°Ô IPv4 ¾×¼¼½º ¼­ºñ½º¸¦ Á¦°øÇÒ ¼ö ÀÖ´Ù. ´Üµ¶ ij¸®¾î±Þ NAT¿Í ´Þ¸® Á¡ÁøÀûÀΠij¸®¾î±Þ NAT´Â µà¾ó½ºÅà ȤÀº IPv6-Only ISP ³×Æ®¿öÅ©·ÎÀÇ ¿øÈ°ÇÑ ÀüȯÀ» Áö¿øÇÏ°í ±ÇÀåÇÑ´Ù. ÁýÀû ±¸¼º ij¸®¾î±Þ NAT ÀåÄ¡ ¹× ÀûÀÀ °¡Á¤ °ÔÀÌÆ®¿þÀÌ (HG) ÀåÄ¡°¡ ¼³¸íµÈ´Ù. µÑÀº ¿©·¯ ¾÷±×·¹À̵带 ÇÇÇÏ°í, ´Ù¸¥ ÀüÀÌ ´Ü°è¿¡¼­ Àç»ç¿ë ÇÒ ¼ö ÀÖ´Ù. ÀÌ°ÍÀº IPv6ÀÇ ¸¶À̱׷¹À̼ÇÀÌ Á¡ÁøÀûÀ¸·Î ½ÇÁ¦ »ç¿ëÀÚÀÇ ¿ä±¸¿¡ µû¶ó ´Þ¼º µÉ ¼ö ÀÖ´Ù. ÅëÇÕÀûÀ¸·Î ±¸¼º °¡´ÉÇÑ Ä³¸®¾î±Þ NAT µð¹ÙÀ̽º¿Í ÀûÀÀÀûÀΠȨ °ÔÀÌÆ®¿þÀÌ µð¹ÙÀ̽º¿¡ ´ëÇؼ­ ±â¼úÇÑ´Ù(µà¾ó½ºÅà Ȩ °ÔÀÌÆ®¿þÀÌ(Home Gateway)¿Í µà¾ó½ºÅà ij¸®¾î±Þ NAT). Á¡ÁøÀûÀΠij¸®¾î±Þ NAT´Â ÀÌ µÎ °¡Áö Àåºñ¸¦ »ç¿ëÇϴµ¥ ÀÌ ÀåºñµéÀº ¼­·Î ´Ù¸¥ Àüȯ ±â°£ µ¿¾È¿¡ Àç»ç¿ë µÉ ¼ö ÀÖ´Ù. µû¶ó¼­, Àüȯ °úÁ¤ µ¿¾È ÀåºñÀÇ ±³Ã¼ ¾øÀÌ ¾÷±×·¹À̵峪 Àç¼³Á¤À» ÅëÇØ Àü ±â°£¿¡ »ç¿ëµÉ ¼ö ÀÖ´Ù. À̸¦ ÅëÇØ ½ÇÁ¦ »ç¿ëÀÚ ¿ä±¸Á¶°Ç¿¡ ºÎÀÀÇϸ鼭 ´Ü°èÀûÀ¸·Î ÀÌ·ïÁö´Â IPv6 ÀüȯÀ» °¡´ÉÇÏ°Ô ÇÑ´Ù.
¿µ¹®³»¿ë¿ä¾à Global IPv6 deployment has been slower than originally expected. As IPv4 address exhaustion approaches, IPv4 to IPv6 transition issues become more critical and less tractable. Host-based transition mechanisms used in dual-stack environments cannot meet all transition requirements. Most end users are not sufficiently experienced to configure or maintain host-based transition mechanisms. Carrier-Grade NAT (CGN) devices with integrated transition mechanisms can reduce the operational changes required during the IPv4 to IPv6 migration or coexistence period.
This document proposes an incremental CGN approach for IPv6 transition. It can provide IPv6 access services for IPv6 hosts and IPv4 access services for IPv4 hosts while leaving much of a legacy ISP network unchanged during the initial stage of IPv4 to IPv6 migration. Unlike CGN alone, incremental CGN also supports and encourages a smooth transition towards dual-stack or IPv6-only ISP networks. An integrated configurable CGN device and an adaptive home gateway (HG) device are described. Both are reusable during different transition phases, avoiding multiple upgrades. This enables IPv6 migration to be incrementally achieved according to real user requirements.
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°ü·ÃÆÄÀÏ TTAE.IF-RFC6264_[1].pdf TTAE.IF-RFC6264_[1].pdf            

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