Date: Sun, 30 Sep 2018 06:34:51 -0700 From: alan somers <asomers@gmail.com> To: Victor Sudakov <vas@mpeks.tomsk.su> Cc: Alan Somers <asomers@freebsd.org>, FreeBSD Net <freebsd-net@freebsd.org> Subject: Re: why rtsold ? Message-ID: <CAOtMX2jTaWTyyk=FDZkj=Q=XNDDOVr4oG4_=U3g%2BmFUNmKLkFQ@mail.gmail.com> In-Reply-To: <20180930052402.GA2335@admin.sibptus.ru> References: <20180930022007.GA2041@admin.sibptus.ru> <CAOtMX2gDVSmEacBacumPjthNU-RxoxLanjp%2BEhPb=nefX2m5cg@mail.gmail.com> <20180930052402.GA2335@admin.sibptus.ru>
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On Sat, Sep 29, 2018, 11:24 PM Victor Sudakov <vas@mpeks.tomsk.su> wrote: > 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 > > > > > > fconfig_re0="" > > > ifconfig_re0_ipv6="inet6 accept_rtadv" > > > > > > What would be the point of enabling rtsold then? > > > > The router may send a router advertisement whenever it wants. That's why > > your machine seems to work even without rtsold. However, SLAAC addresses > > expire after a certain amount of time. rtsold will ask the router for a > > new advertisement before your address expires. You aren't guaranteed to > > have problems if you don't run rtsold, but you aren't guaranteed not to > > have problems if you don't. Best to let it run. > > I see the point but who on earth sent the initial router solicitation > on boot if I never enabled rtsold? > > I have not found rtsold in /etc/rc.d/netif or similar startup script. > > -- > Victor Sudakov, VAS4-RIPE, VAS47-RIPN > 2:5005/49@fidonet http://vas.tomsk.ru/ The rtsol command will send a single router solicitation. It's probably getting invoked on startup. Or, you might've just gotten lucky and heard an unsolicited router advertisement.
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