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Hi, Yukiyo Akisada:<br>
when I change localhost6.localdomain6 to localhost7.localdomain7 in
/etc/hosts on TN, and test again:<br>
I read the tcpdump like following:<br>
<br>
<pre wrap="">03:45:58.605302 IP6 fe80::200:ff:fe00:100 > localhost7.localdomain7:
ICMP6, echo request, seq 0, length 14
03:45:58.605349 IP6 localhost7.localdomain7 > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14
so I think NUT didnot echo reply the localhost, echo reply is from TN.
Thanks
</pre>
wang_jiabo 写道:
<blockquote cite="mid:48A93B24.2060203@redhat.com" type="cite">
<meta content="text/html;charset=ISO-8859-1" http-equiv="Content-Type">
Hi, Yukiyo Akisada:<br>
I donot think NUT sends Echo Reply from ::1<br>
because when I remark the ::1line in /etc/hosts file in TN, and test
again, localhost6.localdomain6 change ::1,<br>
and ::1 send echo request and echo reply to TN, NUT didnot do
anything. like this:<br>
<br>
<pre wrap="">03:45:58.605302 IP6 fe80::200:ff:fe00:100 > ::1 :
ICMP6, echo request, seq 0, length 14
03:45:58.605349 IP6 ::1 > fe80::200:ff:fe00:100:
ICMP6, echo reply, seq 0, length 14</pre>
so in my opinion, NUT didnot do anything<br>
<br>
<br>
<br>
<br>
<br>
<br>
Yukiyo Akisada 写道:
<blockquote cite="mid:20080818145152.1e05b400.akisada@tahi.org"
type="cite">
<pre wrap="">Hi, Wang Jiabo.
TN has the correct behavior.
TN exactly sends Echo Request to ::1 according to your tcpdump,
and NUT sends Echo Reply from ::1.
In this case,
NUT must ignore this Echo Request and must not transmit Echo Reply.
So, NUT is wrong.
Thanks,
On Mon, 18 Aug 2008 13:25:55 +0800
wang_jiabo <a moz-do-not-send="true" class="moz-txt-link-rfc2396E"
href="mailto:jiabwang@redhat.com"><jiabwang@redhat.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">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 ??:
</pre>
<blockquote type="cite">
<pre wrap="">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 <a moz-do-not-send="true" class="moz-txt-link-rfc2396E"
href="mailto:jiabwang@redhat.com"><jiabwang@redhat.com></a> wrote:
</pre>
<blockquote type="cite">
<pre wrap="">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
</pre>
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<pre wrap="">
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<pre wrap=""> </pre>
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