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 <jiabwang@redhat.com> wrote:
> 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 ??:
> > 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
> >>
> >>
> >>
> >>
> >
> >
> >
>
>
--
Yukiyo Akisada <akisada@tahi.org>