Date: Wed, 17 Dec 2008 16:30:28 +0800 From: "Rommel Laranjo" <rslaranjo@gmail.com> Subject: [users:01050] Re: Question about IPv6 Ready Phase 2 Interoperability To: users@tahi.org Message-Id: <f051005f0812170030q53cf0ef1r8b6bbae4215a06e0@mail.gmail.com> In-Reply-To: <ba28e1060812162131q181d9a78q37aa7402b0cac87e@mail.gmail.com> References: <f051005f0812161905t3371c3a5w888cc10bd85fcd9b@mail.gmail.com> <494873F0.7050408@redhat.com> <f051005f0812161949ud67991ch5402979c92a616a6@mail.gmail.com> <ba28e1060812162131q181d9a78q37aa7402b0cac87e@mail.gmail.com> X-Mail-Count: 01050On Wed, Dec 17, 2008 at 1:31 PM, TCP IP <tcp.ip.ip6@gmail.com> wrote: > > Hello, > > Even when i test i got 33% of packet loss., but i think that is worng. > becuse the n/w topology looks as follows. > > MC1 > | > ----------+------------+--------------------- N/W1 MTU 1500 > | > MC2 > | > ---------+----------------+-------------------- N/W2 MTU 1280 > | > MC3 > | > -----+-------------------+----------------------- N/W3 MTU 1500 > | > MC4 > > In script we ping 3 time from MC4 to MC1 as follows. > Ping -c 1 -c 1452 MC1 ( 100% packet loss) > Ping -c 1 -c 1452 MC1 ( 100% packet loss) > Ping -c 3-c 1452 MC1 ( 33% packet loss) > > > Yes, 1st ping will get too big messge from MC3 and MC4 will reduce its PMTU to 1280. > and 2nd ping will reach MC1. The MC1 will try to reply with MTU 1500, so it > also will get Too big message from MC2.( 2packet lost ) > > Now, MC1 and MC4 knows it PMTU, the last ping has to 0 % packet loss right? > > Am i missiing anything here? > > > > > > > On 12/17/08, Rommel Laranjo <rslaranjo@gmail.com> wrote: >> >> Thank you so much wang_jiabo for your reply. So now I think there is >> something wrong with my setup cause I experience huge percentage of packet >> drop. >> From my packet sniff on Network1, I've seen several ICMPv6 Echo reply but >> only few were received by TAR-Router1. >> >> Thanks alot, >> >> Rommel >> >> >> >> On Wed, Dec 17, 2008 at 11:37 AM, wang_jiabo <jiabwang@redhat.com> wrote: >> >>> Hello, Rommel Laranjo: >>> my test result for 1.6 part D: >>> >>> Rommel Laranjo ping6 -I eth0 -c 3 -s 1500 3ffe:501:ffff:104::1 > >>> 1.6.D.RedHat.Cisco.result >>> >>> PING 3ffe:501:ffff:104::1(3ffe:501:ffff:104::1) from >>> 3ffe:501:ffff:100:210:18ff:fe32:56e2 eth0: 1500 data bytes >>> From 3ffe:501:ffff:100::1 icmp_seq=0 Packet too big: mtu=1280 >>> 1508 bytes from 3ffe:501:ffff:104::1: icmp_seq=1 ttl=62 time=2.06 ms >>> 1508 bytes from 3ffe:501:ffff:104::1: icmp_seq=2 ttl=62 time=2.13 ms >>> >>> --- 3ffe:501:ffff:104::1 ping statistics --- >>> 3 packets transmitted, 2 received, +1 errors, 33% packet loss, time >>> 2000ms >>> rtt min/avg/max/mdev = 2.061/2.100/2.139/0.039 ms, pipe 2 >>> >>> >>> [H3CMSR2020]ping ipv6 -s 1500 3ffe:501:ffff:100:210:18ff:fe32:56e2 >>> PING 3ffe:501:ffff:100:210:18ff:fe32:56e2 : 1500 data bytes, press >>> CTRL_C to break >>> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2 >>> bytes=1500 Sequence=1 hop limit=62 time = 2 ms >>> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2 >>> bytes=1500 Sequence=2 hop limit=62 time = 2 ms >>> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2 >>> bytes=1500 Sequence=3 hop limit=62 time = 3 ms >>> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2 >>> bytes=1500 Sequence=4 hop limit=62 time = 3 ms >>> Reply from 3FFE:501:FFFF:100:210:18FF:FE32:56E2 >>> bytes=1500 Sequence=5 hop limit=62 time = 3 ms >>> >>> --- 3ffe:501:ffff:100:210:18ff:fe32:56e2 ping statistics --- >>> 5 packet(s) transmitted >>> 5 packet(s) received >>> 0.00% packet loss >>> round-trip min/avg/max = 2/2/3 ms >>> >>> I hope this can help you. >>> jiabo >>> >>> Hello to all tahi users, >>>> >>>> I know this post is not related to using the TAHI script because I'm >>>> doing manual IPv6 Interoperability Testing. >>>> But I just hope someone would be kind enough to share their expert >>>> knowledge about Interoperability Testing. >>>> >>>> I am now performing Test IP6Interop.1.6: Path MTU Discovery and >>>> Fragmentation Part D steps 23 to 27. My question is this, is it normal to >>>> see packet loss about 90% or sometimes 80% when I ping from TAR-Router1 to >>>> TAR-Host1 ? and from TAR-Host1 to TAR-Router1 ? >>>> If there would be packet loss, how much would be the expected value? >>>> I gladly appreciate your replies. >>>> >>>> >>>> Thanks, >>>> >>>> Rommel >>>> >>>> >>> >>> >> >1050_2.html (attatchment)(tag is disabled)