Hoi, I have found with both VPP and DANOS (another open source routing platform with DPDK under the covers), that some IPv6 neighbors consistently do not make their way into the Linux neighbors list (but they are fine in VPP, as you showed).
If you pre-populate the IPv6 neighbor table in the LInux side, does the host respond? # sudo ip -6 nei replace 2401:1700:1:1::a1 lladdr <itsmac> dev xe1.914 groet, Pim On Mon, Jul 25, 2022 at 10:02 PM najieb <maimun.na...@gmedia.co.id> wrote: > Hi Petr, > > i didn't disable the ping plugin in vpp. but that only happens in some > vlan interfaces. in other vlan ping can work from vpp and host. > > vpp# show interface addr > TenGigabitEthernetb5/0/3.914 (up): > L3 2401:1700:1:1::a2/126 > > > vpp# show ip neighbors TenGigabitEthernetb5/0/3.914 > Time IP Flags Ethernet > Interface > 9829.2736 fe80::c6ad:34ff:fe4d:d2a8 D > c4:ad:34:4d:d2:a8 TenGigabitEthernetb5/0/3.914 > 9871.3363 2401:1700:1:1::a1 D > c4:ad:34:4d:d2:a8 TenGigabitEthernetb5/0/3.914 > > > vpp# ping 2401:1700:1:1::a1 > 76 bytes from 2401:1700:1:1::a1: icmp_seq=1 ttl=64 time=18.8173 ms > 76 bytes from 2401:1700:1:1::a1: icmp_seq=2 ttl=64 time=11.7815 ms > 76 bytes from 2401:1700:1:1::a1: icmp_seq=3 ttl=64 time=14.7457 ms > 76 bytes from 2401:1700:1:1::a1: icmp_seq=4 ttl=64 time=11.7331 ms > 76 bytes from 2401:1700:1:1::a1: icmp_seq=5 ttl=64 time=11.7573 ms > > > najib@DPDK:~$ ip nei show dev xe1.914 > 2401:1700:1:1::a1 lladdr c4:ad:34:4d:d2:a8 router REACHABLE > > > najib@DPDK:~$ ip addr show dev xe1.914 > 9: xe1.914@xe1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 9000 qdisc noqueue > state UP group default qlen 1000 > link/ether 3c:ec:ef:43:b3:1b brd ff:ff:ff:ff:ff:ff > inet6 2401:1700:1:1::a2/126 scope global > valid_lft forever preferred_lft forever > inet6 fe80::3eec:efff:fe43:b31b/64 scope link > valid_lft forever preferred_lft forever > > > najib@DPDK:~$ ping 2401:1700:1:1::a1 > PING 2401:1700:1:1::a1(2401:1700:1:1::a1) 56 data bytes > 64 bytes from 2401:1700:1:1::a1: icmp_seq=1 ttl=64 time=9.76 ms > 64 bytes from 2401:1700:1:1::a1: icmp_seq=2 ttl=64 time=9.84 ms > 64 bytes from 2401:1700:1:1::a1: icmp_seq=3 ttl=64 time=9.77 ms > 64 bytes from 2401:1700:1:1::a1: icmp_seq=4 ttl=64 time=9.80 ms > 64 bytes from 2401:1700:1:1::a1: icmp_seq=5 ttl=64 time=9.84 ms > ^C > --- 2401:1700:1:1::a1 ping statistics --- > 5 packets transmitted, 5 received, 0% packet loss, time 4008ms > rtt min/avg/max/mdev = 9.760/9.802/9.842/0.032 ms > > > > > -- Pim van Pelt <p...@ipng.nl> PBVP1-RIPE - http://www.ipng.nl/
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