Date: Tue, 9 Oct 2018 07:34:14 +0700 From: Victor Sudakov <vas@mpeks.tomsk.su> To: Alan Somers <asomers@freebsd.org> Cc: Kevin Oberman <rkoberman@gmail.com>, FreeBSD Net <freebsd-net@freebsd.org>, citrin+bsd@citrin.ru Subject: Re: why rtsold ? Message-ID: <20181009003414.GA86342@admin.sibptus.ru> In-Reply-To: <CAOtMX2h48S8jrJ0KFzVe=N%2B8u3yAW_CbreanRdrjcK0KYY%2B_0w@mail.gmail.com> References: <20180930022007.GA2041@admin.sibptus.ru> <cf43783f-80ac-11e0-0080-44ee9bb45606@citrin.ru> <20181008170044.GA80041@admin.sibptus.ru> <CAN6yY1vD7fOA1LPL2aq8yjkhSJh9q1n-g4n4_3t3jPUxG-X1aA@mail.gmail.com> <20181009001644.GA86174@admin.sibptus.ru> <CAOtMX2h48S8jrJ0KFzVe=N%2B8u3yAW_CbreanRdrjcK0KYY%2B_0w@mail.gmail.com>
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Alan Somers wrote: > > > > > > When running FreeBSD as an IPv6 host im SLAAC mode, is > > > > > > "rtsold_enable=YES" really necessary? I did not enable rtsold and > > IPv6 > > > > > > still works fine only with > > > > > > > > > > rtsold is needed to write DNS server address from RDNSS RA option to > > > > > /etc/resolv.conf > > > > > > > > > > man rtsold > > > > > /-R > > > > > > > > On my test IPv6-only host, /etc/resolv.conf was successfully created > > > > without any explicit "rtsold_enable=YES". > > > > > > > > -- > > > > Victor Sudakov, VAS4-RIPE, VAS47-RIPN > > > > 2:5005/49@fidonet http://vas.tomsk.ru/ > > > > > > > Remember that DHCPv6 can provide DNS server and other information even > > when > > > SLAAC is used for address configuration. If it is, it is possible to run > > > SLAAC without rtsold, but it may not prove stable as it is not possible > > to > > > > The case is that my IPv6 lab (actually a number of FreeBSD hosts in > > bhyve) does not have a DHCPv6 server. Still, the /etc/resolv.conf on > > IPv6-only hosts is successfully populated from the router. The latter > > is running only rtadvd with the following config: > > > > > > bridge0:rdnss="2001:470:20::2,2001:4860:4860::8888,2001:4860:4860::8844":dnssl=" > > sibptus.ru": > > > > Magick? > > > > Not at all. rtsol will populate /etc/resolv.conf just fine. I see. As I come to think about it, I even don't know how to enable a DHCPv6 client. In my test IPv6-only host, I keep only the following in rc.conf.local: ifconfig_vtnet0="" ifconfig_vtnet0_ipv6="inet6 accept_rtadv" ipv6_privacy="YES" > But it only does it once. rtsold is needed in case router info > changes, or your address times out. -Alan Now I understand, thank you. -- Victor Sudakov, VAS4-RIPE, VAS47-RIPN 2:5005/49@fidonet http://vas.tomsk.ru/
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