Article 854 at 08/08/18 17:37:19 From: hhuan@biigroup.cn Subject: [users:00854] Re: help explain:IPv6-core protocol self

Index: [Article Count Order] [Thread]
Date: Mon, 18 Aug 2008 16:37:21 +0800 From: "Huan Huan" <hhuan@biigroup.cn> Subject: [users:00854] Re: help explain:IPv6-core protocol self_testfor icmpv6 (RFC4443) To: "users" <users@tahi.org> Message-Id: <200808181637105006671@biigroup.cn> References: <48A1337A.3010309@redhat.com>, <20080818114216.dfffadd8.akisada@tahi.org> X-Mail-Count: 00854
Hi Wang Jiabo,

It seems your configure is well and some problems were caused by your NUT but not all, what I mean is your OS kernel bug. But I haven't tested in a RedHat OS ever, so I can't give your a clearly explain for it.

Kindly Regards
Huan

2008-08-18 



Huan Huan 
Engineer
IPv6 Test Center

BII Group
2508,Tower A,Times Fortune Building,
No.6 Shuguangxili, Chaoyang District,
Beijing, China 100028,
Tel:8610 58678188-161,
Mobile:8610 15810532975
Email:hhuan@biigroup.cn



窟周�繁� wang_jiabo 
窟僕扮寂� 2008-08-18  13:30:08 
辺周�烹� users 
貝僕� 
麼籾� [users:00844] Re: help explain:IPv6-core protocol self_testfor icmpv6 (RFC4443) 
 
Hi, Yukiyo Akisada:
    I think my confiugre file on tn has some problem, because 

3:45:58.605302 IP6 fe80::200:ff:fe00:100 > localhost6.localdomain6:
ICMP6, echo request, seq 0, length 14
03:45:58.605349 IP6 localhost6.localdomain6 > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
is my tn computer(freebsd 7.0).
    so could you tell me I should care what, when I configure tn
Thanks
Best regards
wang jiabo

Yukiyo Akisada 亟祇: 
Hi, Wang Jiabo.

Please refer RFC 4291 (IP Version 6 Addressing Architecture).

That says,

    472 2.5.3.  The Loopback Address
    473
    474    The unicast address 0:0:0:0:0:0:0:1 is called the loopback address.
    475    It may be used by a node to send an IPv6 packet to itself.  It must
    476    not be assigned to any physical interface.  It is treated as having
    477    Link-Local scope, and may be thought of as the Link-Local unicast
    478    address of a virtual interface (typically called the "loopback
    479    interface") to an imaginary link that goes nowhere.
    480
    481    The loopback address must not be used as the source address in IPv6
    482    packets that are sent outside of a single node.  An IPv6 packet with
    483    a destination address of loopback must never be sent outside of a
    484    single node and must never be forwarded by an IPv6 router.  A packet
    485    received on an interface with a destination address of loopback must
    486    be dropped.

So you must ignore the packet regarding to line 484-486.

Thanks,


On Tue, 12 Aug 2008 14:53:46 +0800
wang_jiabo <jiabwang@redhat.com> wrote:

  
I donot think my test is wrong

when I test in icmpv6(RFC4443), I get failure in " Request send to
loopback address" section.

but I check the tcpdump message, I don't think my test is wrong. so who
can help me to get correct answer for the question:my link-local sent echo request to localhost,
and get echo reply. but TAHI need that echo request donot need get echo reply. please tell me why?

my tcpdump message:

tcpdump -r 7.html.Link0.dump
reading from file 7.html.Link0.dump, link-type EN10MB (Ethernet)
03:45:58.561963 IP6 fe80::200:ff:fe00:100 > fe80::21d:fff:fe0f:be4e:
ICMP6, echo request, seq 0, length 14
03:45:58.562793 IP6 fe80::21d:fff:fe0f:be4e > ff02::1:ff00:100: ICMP6,
neighbor solicitation, who has fe80::200:ff:fe00:100, length 32
03:45:58.583718 IP6 fe80::200:ff:fe00:100 > fe80::21d:fff:fe0f:be4e:
ICMP6, neighbor advertisement, tgt is fe80::200:ff:fe00:100, length 32
03:45:58.583767 IP6 fe80::21d:fff:fe0f:be4e > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
03:45:58.605302 IP6 fe80::200:ff:fe00:100 > localhost6.localdomain6:
ICMP6, echo request, seq 0, length 14
03:45:58.605349 IP6 localhost6.localdomain6 > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
03:45:58.626733 IP6 fe80::200:ff:fe00:100 > ff02::1: ICMP6, neighbor
advertisement, tgt is fe80::200:ff:fe00:100, length 32
03:45:58.637448 IP6 fe80::200:ff:fe00:100 > fe80::21d:fff:fe0f:be4e:
ICMP6, echo request, seq 0, length 14
03:45:58.637495 IP6 fe80::21d:fff:fe0f:be4e > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
03:46:03.637488 IP6 fe80::21d:fff:fe0f:be4e > fe80::200:ff:fe00:100:
ICMP6, neighbor solicitation, who has fe80::200:ff:fe00:100, length 32
03:46:04.637798 IP6 fe80::21d:fff:fe0f:be4e > fe80::200:ff:fe00:100:
ICMP6, neighbor solicitation, who has fe80::200:ff:fe00:100, length 32
03:46:05.637988 IP6 fe80::21d:fff:fe0f:be4e > fe80::200:ff:fe00:100:
ICMP6, neighbor solicitation, who has fe80::200:ff:fe00:100, length 32


[TAHI] tcpdump message:

tcpdump -r 71.html.Link0.dump
reading from file 71.html.Link0.dump, link-type EN10MB (Ethernet)
04:30:19.486863 IP6 fe80::200:ff:fe00:100 > fe80::200:2ff:fe00:27cd:
ICMP6, echo request, seq 0, length 14
04:30:19.487287 IP6 fe80::200:2ff:fe00:27cd > ff02::1:ff00:100: ICMP6,
neighbor solicitation, who has fe80::200:ff:fe00:100, length 32
04:30:19.694252 IP6 fe80::200:ff:fe00:100 > fe80::200:2ff:fe00:27cd:
ICMP6, neighbor advertisement, tgt is fe80::200:ff:fe00:100, length 32
04:30:19.694627 IP6 fe80::200:2ff:fe00:27cd > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
04:30:19.903842 IP6 fe80::200:ff:fe00:100 > localhost6.localdomain6:
ICMP6, echo request, seq 0, length 14
04:30:25.115860 IP6 fe80::200:ff:fe00:100 > ff02::1: ICMP6, neighbor
advertisement, tgt is fe80::200:ff:fe00:100, length 32
04:30:25.219835 IP6 fe80::200:ff:fe00:100 > fe80::200:2ff:fe00:27cd:
ICMP6, echo request, seq 0, length 14
04:30:25.220171 IP6 fe80::200:2ff:fe00:27cd > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
04:30:30.218676 IP6 fe80::200:2ff:fe00:27cd > fe80::200:ff:fe00:100:
ICMP6, neighbor solicitation, who has fe80::200:ff:fe00:100, length 32
04:30:31.218447 IP6 fe80::200:2ff:fe00:27cd > fe80::200:ff:fe00:100:
ICMP6, neighbor solicitation, who has fe80::200:ff:fe00:100, length 32
04:30:32.218247 IP6 fe80::200:2ff:fe00:27cd > fe80::200:ff:fe00:100:
ICMP6, neighbor solicitation, who has fe80::200:ff:fe00:100, length 32



thanks 
best regards
854_2.html (attatchment)(tag is disabled)