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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