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  DSR±¸¼ºÀ» À§ÇÑ loopback ¼³Á¤ ÀÛ¼ºÀÏ : 2010/03/25 08:14
 
  • ±Û¾´ÀÌ : ÁÁÀºÁøÈ£ ( http://coffeenix.net/ )
  • Á¶È¸¼ö : 27103
          [ ÀÌÀüÈ­¸é / ¼öÁ¤ ]   ºñ¹Ð¹øÈ£ :     Àμâ¿ë È­¸é
      Á¦  ¸ñ : DSR±¸¼ºÀ» À§ÇÑ loopback ¼³Á¤
    ÀÛ¼ºÀÚ : ÁÁÀºÁøÈ£(truefeel, http://coffeenix.net/ )
    ÀÛ¼ºÀÏ : 2010.3.12(±Ý)

    DSR(Direct Server Return)±¸¼ºÀº
    1) ÆÐŶÀÌ µé¾î¿Ã ¶§´Â L4½ºÀ§Ä¡³ª ·Îµå ¹ë·±¼­(Load Balancer)¸¦ ÅëÇؼ­ µé¾î¿ÀÁö¸¸,
    2) ÆÐŶÀÌ   ³ª°¥ ¶§´Â L4½ºÀ§Ä¡³ª ·Îµå ¹ë·±¼­(Load Balancer)¸¦ °ÅÄ¡Áö ¾Ê°í ¹Ù·Î ³ª°¡´Â ±¸¼ºÀÌ´Ù.



    loopback¿ë IP(L4ÀÇ DSR±¸¼º½Ã¿¡ VIP¿¡ ÇØ´ç)°¡ 192.168.123.20À̶ó°í ÇÒ ¶§ ¼³Á¤ ¿¹ÀÌ´Ù.


    1. Linux¿¡¼­ (CentOS, RHEL)

    1) /etc/sysconfig/network-scripts/ifcfg-lo:0 ¸¦ ¼³Á¤ÇÑ´Ù. ifcfg-lo ÆÄÀÏÀ» º¹»çÇؼ­ ¼³Á¤ÇÏ¸é ½±°Ô ÇÒ ¼ö ÀÖ´Ù.

    [ Çü½Ä ]
     
    DEVICE=lo:0
    IPADDR=< VIP >
    NETMASK=255.255.255.255
    NETWORK=< ³×Æ®¿÷´ë¿ª >
    BROADCAST=< Broadcast IP >
    ONBOOT=yes
     


    [ ¼³Á¤ ¿¹ ]
     
    DEVICE=lo:0
    IPADDR=192.168.123.20
    NETMASK=255.255.255.255
    NETWORK=192.168.123.0
    BROADCAST=192.168.123.255
    ONBOOT=yes
     


    2) /etc/sysctl.conf ¿¡ ´ÙÀ½À» Ãß°¡ÇÑ´Ù. (ARP¹®Á¦·Î ÀÎÇØ ÇÊ¿ä½Ã. Ä¿³Î 2.6)

     
    net.ipv4.conf.lo.arp_ignore = 1
    net.ipv4.conf.lo.arp_announce = 2
    net.ipv4.conf.all.arp_ignore = 1
    net.ipv4.conf.all.arp_announce = 2
     


    3) ½©¿¡¼­ loopback ¼³Á¤Àº ´ÙÀ½°ú °°ÀÌ ÇÑ´Ù. (ARP¹®Á¦·Î ÀÎÇØ ÇÊ¿ä½Ã)

     
    # sysctl net.ipv4.conf.lo.arp_ignore=1
    # sysctl net.ipv4.conf.lo.arp_announce=2
    # sysctl net.ipv4.conf.all.arp_ignore=1
    # sysctl net.ipv4.conf.all.arp_announce=2
    #
    # ifconfig lo:0 192.168.123.20 netmask 255.255.255.255
     



    2. FreeBSD¿¡¼­

    1) /etc/rc.conf ¿¡ ´ÙÀ½ ¼³Á¤À» Ãß°¡ÇÑ´Ù.

     
    ifconfig_lo0_alias0="inet 192.168.123.20 netmask 255.255.255.255"
     


    2) /etc/sysctl.conf ¿¡ net.inet.ip.check_interface À» 0À¸·Î ¼³Á¤Çϰųª, ¼³Á¤ ÀÚü¸¦ ¾ø¾Ø´Ù. (default°ªÀº 0)

     
    net.inet.ip.check_interface=0
     


    3) ºÎÆà ÈÄ ifconfigÀ» È®ÀÎÇÑ´Ù. ¸®´ª½º¿Í ´Ù¸£°Ô, loopback ¼³Á¤ÀÌ ´«¿¡ Àß ¶çÁö ¾ÊÀ¸´Ï ÀÚ¼¼È÷ »ìÆìºÁ¾ß ÇÑ´Ù.

     
    # ifconfig ¶Ç´Â ifconfig lo0
    ... »ý·« ...
    lo0: flags=8049<UP,LOOPBACK,RUNNING,MULTICAST> metric 0 mtu 16384
    ¡¡¡¡¡¡inet 127.0.0.1 netmask 0xff000000
    ¡¡¡¡¡¡inet 192.168.123.20 netmask 0xffffffff  <-- loopback ¼³Á¤ÀÌ µÇ¾î ÀÖ´Ù.
     


    4) ºÎÆþøÀÌ ½©¿¡¼­ loopback IP¸¦ Ãß°¡, »èÁ¦ÇÏ´Â ¹æ¹ý

       - Ãß°¡ : ifconfig lo0 inet 192.168.123.20 netmask 255.255.255.255 alias
       - »èÁ¦ : ifconfig lo0 inet 192.168.123.20 netmask 255.255.255.255 delete


    ¡Ø loopback¼³Á¤¿¡ ´ëÇØ Á÷Á¢ ¹®ÀÇÇϽô ºÐÀÌ °è¼Å¼­ Á¤¸®Çß´Ù.
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