Hi, Thanks for your reply.
I did a packet capture using Wireshark to compare RA from the VPP/MikroTik/Radvd. There is no problem with routing advertisements from VPP, but with Neighbor Advertisement when RA is enabled. ICMP v6 flag is not set correctly - The Router flag is NOT set on the VPP side. Debian 11 ignores this, Windows and a few others remove the default gateway after receiving this neighbor advertisement. Wireshark .pcapng in the link. I use the Kea6 dhcp6 server for prefix delegation + VPP for RA (not using radvd - only for testing). Many users want to use VPP as a home gateway and IPv6 RA not working correctly with various end-user devices (like windows for this testing scenario). VPP RA+ND - line 914 MikroTik RA+ND - line 819 https://easyupload.io/m/xwvqjj If I missed something in the configuration of VPP, please let me know. I did not find any relevant CLI Best regards Petr pá 4. 11. 2022 v 13:25 odesílatel Benoit Ganne (bganne) via lists.fd.io <bganne=cisco....@lists.fd.io> napsal: > Hi Petr, > > Unfortunately I can't confirm the issue, but I do not think it is a very > commonly tested scenario so it is not really surprising... > What could help understand the issue would be if you could capture the RA > traffic in both scenarios (VPP vs radvd) so we can compare. > > Best > ben > > > -----Original Message----- > > From: vpp-dev@lists.fd.io <vpp-dev@lists.fd.io> On Behalf Of Petr Boltík > > Sent: Friday, November 4, 2022 12:50 > > To: vpp-dev <vpp-dev@lists.fd.io> > > Subject: Re: [vpp-dev] Bug report - IP6 ND RA default route disappear > from > > host device > > > > Hi all, > > > > Can someone please confirm this VPP IP6 RA issue? Any idea is welcome. I > > already tested the latest VPP build v23.02-rc0~96-ge69d97438~b598 with no > > success. Installed default IP6 GW on Windows7/10/UBNTairOS disappeared > > after a short time. Thanks > > > > Best regards > > Petr B. > > > > pá 28. 10. 2022 v 18:37 odesílatel Petr Boltík <petr.bol...@gmail.com > > <mailto:petr.bol...@gmail.com> > napsal: > > > > > > 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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