Hi David, Please let me know any other mailing list or persons I need to add.
Thanks, Sundeep On Fri, Jan 5, 2018 at 12:07 PM, sundeep subbaraya <sundeep.l...@gmail.com> wrote: > Hi, > > I am quite new to IPv6. > I ran to one problem hope you guys can help me. > I have multiple ethernet port box which runs by Altera's Cyclone 5. > I am using source based policy routing for ipv6. > The problem is when there is "default via <gateway>" entry in per interface > routing table then ping to a link local address of directly connected PC from > that interface fails. > > # ip -6 rule > 0: from all lookup local > 16383: from all oif eth2 lookup eth2 > 16383: from 2001::200 lookup eth2 > 32766: from all lookup main > > # ip -6 route show table eth2 > 2001::/64 dev eth2 src 2001::200 metric 1024 pref medium > default via 2001::5 dev eth2 metric 1024 pref medium > > # ping6 fe80::21b:cdff:fe03:1357 -I eth2 > PING fe80::21b:cdff:fe03:1357(fe80::21b:cdff:fe03:1357) from > fe80::2b0:aeff:fe03:7c1c eth2: 56 data bytes > From fe80::2b0:aeff:fe03:7c1c icmp_seq=1 Destination unreachable: > Address unreachable > From fe80::2b0:aeff:fe03:7c1c icmp_seq=2 Destination unreachable: > Address unreachable > From fe80::2b0:aeff:fe03:7c1c icmp_seq=3 Destination unreachable: > Address unreachable > ^C > --- fe80::21b:cdff:fe03:1357 ping statistics --- > 5 packets transmitted, 0 received, +3 errors, 100% packet loss, time 4007ms > > # ip -6 route del default dev eth2 table eth2 > # ping6 fe80::21b:cdff:fe03:1357 -I eth2 > PING fe80::21b:cdff:fe03:1357(fe80::21b:cdff:fe03:1357) from > fe80::2b0:aeff:fe03:7c1c eth2: 56 data bytes > 64 bytes from fe80::21b:cdff:fe03:1357: icmp_seq=1 ttl=64 time=0.285 ms > 64 bytes from fe80::21b:cdff:fe03:1357: icmp_seq=2 ttl=64 time=1.73 ms > 64 bytes from fe80::21b:cdff:fe03:1357: icmp_seq=3 ttl=64 time=1.75 ms > ^C > --- fe80::21b:cdff:fe03:1357 ping statistics --- > 3 packets transmitted, 3 received, 0% packet loss, time 2001ms > rtt min/avg/max/mdev = 0.285/1.258/1.755/0.688 ms > > From Wireshark captures, though I ping link local first Neighbor > solicitation for default > gateway ip 2001::5 goes on wire. Since that gateway is not present > ping does not work. > If gateway is present and reply with Neighbor Advertisement then echo > request and replies with > link local happens properly after that. > Why does Neighbor Solicitation for default gateway happens though we > ping link local address ? > I assume link local ping should work despite of unavailable default gateway. > Please correct me if am wrong. Also let me know how to change this behavior. > > I am using 4.1.22-ltsi kernel. > > Thanks, > Sundeep
