*Ping/ICMP communication between two peers is not working when using ipv6 link local address* The VPP version is 19.01.2 and vppsb router plugin used: Platform is Linux-Debian.
1st Device: Linux: root@rad:/# ip addr show vpp2 10: vpp2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 00:08:a2:09:5a:fe brd ff:ff:ff:ff:ff:ff inet 11.11.11.11/24 brd 11.11.11.255 scope global vpp2 valid_lft forever preferred_lft forever inet6 fe80::208:a2ff:fe09:5afe/64 scope link valid_lft forever preferred_lft forever root@rad:/# VPP: vpp# show ip6 interface GigabitEthernet0/14/2 GigabitEthernet0/14/2 is admin up Link-local address(es): fe80::208:a2ff:fe09:5afe Joined group address(es): ff02::1 ff02::2 ff02::16 Advertised Prefixes: MTU is 1790 ICMP error messages are unlimited ICMP redirects are disabled ICMP unreachables are not sent ND DAD is disabled ND advertised reachable time is 0 ND advertised retransmit interval is 0 (msec) ND router advertisements are sent every 200 seconds (min interval is 150) ND router advertisements live for 600 seconds Hosts don't use stateless autoconfig for addresses ND router advertisements sent 8 ND router solicitations received 0 ND router solicitations dropped 0 vpp# 2nd Device: Linux: root@rad:/etc/vpp# ip addr show vpp0 10: vpp0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether 00:08:a2:0c:bb:42 brd ff:ff:ff:ff:ff:ff inet 11.11.11.1/24 brd 11.11.11.255 scope global vpp0 valid_lft forever preferred_lft forever inet6 fe80::208:a2ff:fe0c:bb42/64 scope link valid_lft forever preferred_lft forever root@rad:/etc/vpp# vpp# show ip6 interface GigabitEthernet0/14/0 GigabitEthernet0/14/0 is admin up Link-local address(es): fe80::208:a2ff:fe0c:bb42 Joined group address(es): ff02::1 ff02::2 ff02::16 Advertised Prefixes: MTU is 1790 ICMP error messages are unlimited ICMP redirects are disabled ICMP unreachables are not sent ND DAD is disabled ND advertised reachable time is 0 ND advertised retransmit interval is 0 (msec) ND router advertisements are sent every 200 seconds (min interval is 150) ND router advertisements live for 600 seconds Hosts don't use stateless autoconfig for addresses ND router advertisements sent 8 ND router solicitations received 0 ND router solicitations dropped 0 vpp# /* If ping from second device to 1st device(and vice versa) from Linux it is not working. */ root@ewn:/etc/vpp# ping fe80::208:a2ff:fe09:5afe%vpp0 PING fe80::208:a2ff:fe09:5afe%vpp0(fe80::208:a2ff:fe09:5afe%vpp0) 56 data bytes --- fe80::208:a2ff:fe09:5afe%vpp0 ping statistics --- 11 packets transmitted, 0 received, 100% packet loss, time 10225ms ^Croot@ewn:/etc/vpp# Please advise.
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