Hi all, I have discovered the problem with IP6 ND RA receiving side - it can be observed on Windows 10/7/UBNT airos8 and some others. Issue not observed on the Debian 11+nmcli. Configuration is pretty straightforward. Tested with VPP 22.06, 22.10. Issue persists. VPP configuration is the default, tested on APU4D4 and a few others. No linuxcp/nl is used.
1. configure VPP: > set interface ip address GigabitEthernet3/0/0 2a01:500::1/64 > set interface state GigabitEthernet3/0/0 up > create loopback interface > set interface state loop0 up > set interface ip address loop0 2a01:400::1/64 > ip6 nd GigabitEthernet3/0/0 prefix 2a01:500::/64 default > ip6 nd GigabitEthernet3/0/0 no ra-suppress > vpp# show version vpp v22.10-release built by root on 89a4591888eb at 2022-10-26T14:00:30 2. connect host Windows7/10/ubnt to the GigabitEthernet3/0/0 and you can observe weird behavior - RA from VPP is received, IP6 address is installed. Icmp echo to the VPP link local address and configured 2a01:500::1 works. - RA from VPP is received, IP6 default route is installed and works. Icmp echo to the 2a01:400::1 works. *Issue*: After stopping all icmp echo for a few seconds/minutes, IP6 default route is removed from the host system, and the path to the 2a01:400::1 is unknown for the host. The default route is removed - the host device ignores ra-lifetime. LinuxCP/NL + RADVD sollution test: I have already tried to solve this problem by using linuxcp/nl and RADVD, but there is another issue. When radvd start, communication from the external host to the link-local address stop passing. The host device successfully receives prefix and default route, but the default route is via the link-local address and the vpp link-local address is inaccessible from the host device after radvd start. Best regards Petr Boltik
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