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<TITLE>RE: [rbak-nsp] ipv6 - strange ?? (ping)</TITLE>
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<P><FONT SIZE=2>Can you paste output of your "show nd int" and "show nd neighbor" ?<BR>
<BR>
------------------------------------------------<BR>
David Freedman<BR>
Group Network Engineering<BR>
Claranet Limited<BR>
<A HREF="http://www.clara.net">http://www.clara.net</A><BR>
<BR>
<BR>
<BR>
-----Original Message-----<BR>
From: Marcin Kuczera [<A HREF="mailto:marcin@leon.pl">mailto:marcin@leon.pl</A>]<BR>
Sent: Sun 3/29/2009 13:39<BR>
To: David Freedman<BR>
Cc: redback-nsp@puck.nether.net<BR>
Subject: Re: [rbak-nsp] ipv6 - strange ?? (ping)<BR>
<BR>
David Freedman wrote:<BR>
><BR>
> Your output is a bit hard to parse , but I can see you have two link<BR>
> local addresses the same :<BR>
><BR>
> > Intf name: vlan101<BR>
> > Link local addr:fe80::230:88ff:fe12:59f Number of Bound Circuits<BR>
> ><BR>
> > Intf name: vlan102<BR>
> > Link local addr:fe80::230:88ff:fe12:59f Number of Bound Circuits<BR>
<BR>
you are right, that's strage.. but - assigned automatically<BR>
<BR>
> Can you ping vlan201 (which has a different link-local)?<BR>
<BR>
nope..<BR>
[bgp1]RedBack_SE100#ping 2a02:c40:1::1<BR>
PING6 2a02:c40:1::1 : 8 data bytes<BR>
timeout is 1 second, source 2a02:c40:1::1<BR>
.....<BR>
--- 2a02:c40:1::1 ping6 statistics ---<BR>
5 packets transmitted, 0 packets received, 100% packet loss<BR>
[bgp1]RedBack_SE100#<BR>
<BR>
> According to RFC, these should be "scoped" if they are going to be<BR>
> shared, but I don't<BR>
> see any evidence of scoping going on here.<BR>
><BR>
> As a test, can you try changing link-local address of one of the vlans<BR>
> to something else?<BR>
<BR>
I did, but it didn't help...<BR>
<BR>
Marcin<BR>
<BR>
<BR>
<BR>
> Dave.<BR>
><BR>
><BR>
> ------------------------------------------------<BR>
> David Freedman<BR>
> Group Network Engineering<BR>
> Claranet Limited<BR>
> <A HREF="http://www.clara.net">http://www.clara.net</A><BR>
><BR>
><BR>
><BR>
> -----Original Message-----<BR>
> From: Marcin Kuczera [<A HREF="mailto:marcin@leon.pl">mailto:marcin@leon.pl</A>]<BR>
> Sent: Sun 3/29/2009 12:58<BR>
> To: David Freedman<BR>
> Cc: redback-nsp@puck.nether.net<BR>
> Subject: Re: [rbak-nsp] ipv6 - strange ?? (ping)<BR>
><BR>
> David Freedman wrote:<BR>
> ><BR>
> > What is the source IPv6 interface for your pings?<BR>
><BR>
> Look - the ping goes to the other end of p2p interface (vlan102 is p2mp,<BR>
> because it is IX).<BR>
> So - i.e. for vlan101 if I ping 2a01:1d8:7fff:fffd:1::16, the source is<BR>
> 2a01:1d8:7fff:fffd:1::15 (from outgoing interface, just like in ipv4).<BR>
><BR>
> > Is it reachable by all the destinations you are pinging?<BR>
><BR>
> yes, I'am pinging point-to-point ends..<BR>
> The biggest problem is with... pinging myself !<BR>
><BR>
> > Also, do you have an admin acl in place on the context?<BR>
><BR>
> no ACLs.<BR>
><BR>
> At the first interface setup (vlan101) both ends were responding, after<BR>
> adding vlan102 ipv6 everything started behaving strange..<BR>
><BR>
> Regards,<BR>
> Marcin<BR>
><BR>
><BR>
><BR>
> ><BR>
> > ------------------------------------------------<BR>
> > David Freedman<BR>
> > Group Network Engineering<BR>
> > Claranet Limited<BR>
> > <A HREF="http://www.clara.net">http://www.clara.net</A><BR>
> ><BR>
> ><BR>
> ><BR>
> > -----Original Message-----<BR>
> > From: redback-nsp-bounces@puck.nether.net on behalf of Marcin Kuczera<BR>
> > Sent: Sun 3/29/2009 11:41<BR>
> > To: redback-nsp@puck.nether.net<BR>
> > Subject: [rbak-nsp] ipv6 - strange ?? (ping)<BR>
> ><BR>
> ><BR>
> ><BR>
> > Look at that, I have IPv6 /32 prefix, advertised via BGP.<BR>
> > Both peers are UP.<BR>
> > Neighbor AS MsgRcvd MsgSent TblVer InQ OutQ Rst<BR>
> > Up/Down PfxRcvd/Sent<BR>
> > 2001:7f8:42::a500:8545:1 8545 3095 3491 22392 0 0<BR>
> > 14 2d01h 38 1<BR>
> > 2a01:1d8:7fff:fffd:1::16 15744 11432 7919 22392 0 0<BR>
> > 4 2d08h 1579 1<BR>
> ><BR>
> > My interfaces:<BR>
> ><BR>
> > Intf name: vlan101<BR>
> > Intf state: Up IPv6 MTU: 1500<BR>
> > Description: Silweb<BR>
> > Address: 2a01:1d8:7fff:fffd:1::15 Prefix len: 126<BR>
> > Link local addr:fe80::230:88ff:fe12:59f Number of Bound Circuits<BR>
> > (incl. dynamic) = 1<BR>
> ><BR>
> > Intf name: vlan102<BR>
> > Intf state: Up IPv6 MTU: 1500<BR>
> > Description: PLIX<BR>
> > Address: 2001:7f8:42::a501:3000:1 Prefix len: 64<BR>
> > Link local addr:fe80::230:88ff:fe12:59f Number of Bound Circuits<BR>
> > (incl. dynamic) = 1<BR>
> ><BR>
> > Intf name: vlan201<BR>
> > Intf state: Up IPv6 MTU: 1500<BR>
> > Description: serwerownia komercyjna<BR>
> > Address: 2a02:c40:1::1 Prefix len: 48<BR>
> > Link local addr:fe80::230:88ff:fe12:5a0 Number of Bound Circuits<BR>
> > (incl. dynamic) = 1<BR>
> ><BR>
> > ##################<BR>
> > now - the problem (vlan101):<BR>
> > [bgp1]RedBack_SE100#ping 2a01:1d8:7fff:fffd:1::15<BR>
> > PING6 2a01:1d8:7fff:fffd:1::15 : 8 data bytes<BR>
> > timeout is 1 second, source 2a01:1d8:7fff:fffd:1::15<BR>
> > .....<BR>
> > --- 2a01:1d8:7fff:fffd:1::15 ping6 statistics ---<BR>
> > 5 packets transmitted, 0 packets received, 100% packet loss<BR>
> > [bgp1]RedBack_SE100#ping 2a01:1d8:7fff:fffd:1::16<BR>
> > PING6 2a01:1d8:7fff:fffd:1::16 : 8 data bytes<BR>
> > timeout is 1 second, source 2a01:1d8:7fff:fffd:1::15<BR>
> > .....<BR>
> > --- 2a01:1d8:7fff:fffd:1::16 ping6 statistics ---<BR>
> > 5 packets transmitted, 0 packets received, 100% packet loss<BR>
> ><BR>
> > 1 2a01:1d8:7fff:fffd:1::15 3.955 ms 3.489 ms 3.761 ms<BR>
> > [bgp1]RedBack_SE100#trace 2a01:1d8:7fff:fffd:1::16<BR>
> > traceroute6 to 2a01:1d8:7fff:fffd:1::16 from 2a01:1d8:7fff:fffd:1::15,<BR>
> > 30 hops max, 12 byte packets<BR>
> > 1 * * *<BR>
> > ^C[bgp1]RedBack_SE100#trace 2a01:1d8:7fff:fffd:1::15<BR>
> > traceroute6 to 2a01:1d8:7fff:fffd:1::15 from 2a01:1d8:7fff:fffd:1::15,<BR>
> > 30 hops max, 12 byte packets<BR>
> > 1 2a01:1d8:7fff:fffd:1::15 4.172 ms 1.481 ms 1.656 ms<BR>
> ><BR>
> > (vlan102):<BR>
> > [bgp1]RedBack_SE100#ping 2001:7f8:42::a500:8545:1<BR>
> > PING6 2001:7f8:42::a500:8545:1 : 8 data bytes<BR>
> > timeout is 1 second, source 2001:7f8:42::a501:3000:1<BR>
> > !!!!!<BR>
> ><BR>
> > --- 2001:7f8:42::a500:8545:1 ping6 statistics ---<BR>
> > 5 packets transmitted, 5 packets received, 0% packet loss<BR>
> > round-trip min/avg/max/std-dev = 6.649/7.014/7.445/0.317 ms<BR>
> > [bgp1]RedBack_SE100#ping 2001:7f8:42::a501:3000:1<BR>
> > PING6 2001:7f8:42::a501:3000:1 : 8 data bytes<BR>
> > timeout is 1 second, source 2001:7f8:42::a501:3000:1<BR>
> > .....<BR>
> > --- 2001:7f8:42::a501:3000:1 ping6 statistics ---<BR>
> > 5 packets transmitted, 0 packets received, 100% packet loss<BR>
> > [bgp1]RedBack_SE100#trace 2001:7f8:42::a501:3000:1<BR>
> > traceroute6 to 2001:7f8:42::a501:3000:1 from 2001:7f8:42::a501:3000:1,<BR>
> > 30 hops max, 12 byte packets<BR>
> > 1 2001:7f8:42::a501:3000:1 3.839 ms 2.355 ms 2.785 ms<BR>
> ><BR>
> ><BR>
> > What is going wrong ???<BR>
> > Is it so unstable or what ???<BR>
> > SEOS 6.1.4.1.p4<BR>
> ><BR>
> ><BR>
> > Regards,<BR>
> > Marcin<BR>
> ><BR>
> ><BR>
> ><BR>
> > _______________________________________________<BR>
> > redback-nsp mailing list<BR>
> > redback-nsp@puck.nether.net<BR>
> > <A HREF="https://puck.nether.net/mailman/listinfo/redback-nsp">https://puck.nether.net/mailman/listinfo/redback-nsp</A><BR>
> ><BR>
><BR>
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