Hi, >>>>> On Sat, 03 Nov 2007 00:05:07 +0900 >>>>> Byung-Hee HWANG <[EMAIL PROTECTED]> said:
bh> To Whom It May Concern: (Cc'ed [EMAIL PROTECTED]) bh> Usually i prefer 6to4(stf(4)) to 6over4(gif(4)) because some bh> tunnel providers like to limit bandwidth too musch. So until my bh> upstream ISP give me native ipv6 addresses (it's take long time maybe), bh> i'm going to use 6to4 instead of 6over4 continuous. bh> Here is my shot using 6to4: bh> [EMAIL PROTECTED]:~> uname -a bh> FreeBSD viola.izb.knu.ac.kr 7.0-BETA1 FreeBSD 7.0-BETA1 #0: bh> Fri Nov 2 12:13:10 KST 2007 bh> [EMAIL PROTECTED]:/usr/obj/usr/src/sys/GENERIC i386 bh> [EMAIL PROTECTED]:~> ifconfig rl0 | grep 2002 bh> inet6 2002:9be6:9d5d:2:20b:6aff:fe56:969f prefixlen 64 autoconf bh> [EMAIL PROTECTED]:~> ping6 -c 5 mx.jp.freebsd.org. bh> PING6(56=40+8+8 bytes) bh> 2002:9be6:9d5d:2:20b:6aff:fe56:969f --> 2001:218:422:1::15 bh> 16 bytes from 2001:218:422:1::15, icmp_seq=0 hlim=49 time=225.297 ms bh> 16 bytes from 2001:218:422:1::15, icmp_seq=1 hlim=49 time=224.591 ms bh> 16 bytes from 2001:218:422:1::15, icmp_seq=2 hlim=49 time=237.175 ms bh> 16 bytes from 2001:218:422:1::15, icmp_seq=3 hlim=49 time=230.540 ms bh> 16 bytes from 2001:218:422:1::15, icmp_seq=4 hlim=49 time=224.681 ms bh> --- mx.jp.freebsd.org ping6 statistics --- bh> 5 packets transmitted, 5 packets received, 0.0% packet loss bh> round-trip min/avg/max/std-dev = 224.591/228.457/237.175/4.889 ms bh> [EMAIL PROTECTED]:~> traceroute6 mx.jp.freebsd.org. bh> traceroute6 to mx.jp.freebsd.org (2001:218:422:1::15) from bh> 2002:9be6:9d5d:2:20b:6aff:fe56:969f, 64 hops max, 12 byte packets bh> 1 2002:9be6:9d5d:2:250:4dff:fe00:5df3 1.541 ms 0.949 ms 1.154 ms bh> [......] bh> 23 v6.imgsrc.co.jp 264.635 ms 226.812 ms 232.207 ms bh> 24 castle.jp.FreeBSD.org 427.683 ms 219.659 ms 222.862 ms bh> [EMAIL PROTECTED]:~> bh> And from now on, i would give you one question. Why is 7.0-BETA1 bh> different from another -RELEASE in hostname resolving order? AFAIK, at bh> least on 6.2-RELEASE, the order is first IPv6 and then IPv4. However, bh> 7.0-BETA1 try to lookup in first IPv4 than IPv6. Here is the evidence: bh> [EMAIL PROTECTED]:~> uname -srm bh> FreeBSD 6.2-RELEASE-p8 i386 bh> [EMAIL PROTECTED]:~> telnet mx.jp.freebsd.org 25 bh> Trying 2001:218:422:1::15... bh> Connected to mx.jp.freebsd.org. bh> Escape character is '^]'. bh> [......] bh> [EMAIL PROTECTED]:~> ssh -v mx.jp.freebsd.org. bh> debug1: Connecting to mx.jp.freebsd.org. [2001:218:422:1::15] bh> ^C bh> bh> And bh> [EMAIL PROTECTED]:~> uname -srm bh> FreeBSD 7.0-BETA1 i386 bh> [EMAIL PROTECTED]:~> telnet mx.jp.freebsd.org 25 bh> Trying 210.226.20.15... bh> Connected to mx.jp.freebsd.org. bh> Escape character is '^]'. bh> [......] bh> [EMAIL PROTECTED]:~> ssh -v mx.jp.freebsd.org. bh> debug1: Connecting to mx.jp.freebsd.org. [210.226.20.15] bh> ^C bh> What happended? Is there anyone to dislike IPv6 in src committers? bh> Please let me know the correct answer to this puzzle ;; The Default Address Selection is turned on by default after 6.2-RELEASE was out. According to RFC 3484, the default policy is as follows: Prefix Prec Label ::1/128 50 0 ::/0 40 1 2002::/16 30 2 ::/96 20 3 ::ffff:0.0.0.0/96 10 4 It means that communicating with native IP address is preferred over 6to4 address when source address and destination adddress are not 6to4 address. If you want not to treat 6to4 address as special, you can omit the line of 2002::/16 by putting the following lines into your /etc/ip6addrctl.conf: ::1/128 50 0 ::/0 40 1 ::/96 20 3 ::ffff:0.0.0.0/96 10 4 Then, run `/etc/rc.d/ip6addrctl restart'. Please refer the ip6addrctl(8) manpage and RFC 3484 for detail. Sincerely, -- Hajimu UMEMOTO @ Internet Mutual Aid Society Yokohama, Japan [EMAIL PROTECTED] [EMAIL PROTECTED],jp.}FreeBSD.org http://www.imasy.org/~ume/ _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-stable To unsubscribe, send any mail to "[EMAIL PROTECTED]"
