Date: Mon, 18 Aug 2008 13:25:55 +0800 From: wang_jiabo <jiabwang@redhat.com> Subject: [users:00844] Re: help explain:IPv6-core protocol self_test for icmpv6 (RFC4443) To: users@tahi.org Message-Id: <48A907E3.5070004@redhat.com> In-Reply-To: <20080818114216.dfffadd8.akisada@tahi.org> References: <48A1337A.3010309@redhat.com> <20080818114216.dfffadd8.akisada@tahi.org> X-Mail-Count: 00844Hi, 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 >> >> >> >> > > >844_2.html (attatchment)(tag is disabled)