On Mon, Mar 24, 2025 at 09:03:49AM -0600, Diana Eichert wrote:
> inline
>
> On Sun, Mar 23, 2025 at 10:30???PM Philipp Buehler
> <e1c1bac6253dc54a1e89ddc046585...@posteo.net> wrote:
> >
> > Am 24.03.2025 00:24 schrieb Diana Eichert:
> > > Am I missing something or is this the only way to automatically bring
> > > up a pair(4) patch?
> > >
> > > find /etc -name '*.pair*' -print -exec cat {} \;
> > > /etc/hostname.pair0
> > > rdomain 0
> >
> > > group pair
> > > lladdr 00:00:C0:44:44:00
> >
> > group and lladdr is optional
>
> yep, just thought I'd post the entire file. I have a weird quirk
> where I set lladdr on network interfaces to Western Digital OUI
> values, allows me to look at network device cam tables for my
> systems.
>
> > > inet 10.1.1.0/31
> > > up
> > up is implied when setting inet/inet6
that's not always true anymore.
having address config imply bringing an interface up is awkward from an
error reporting and recovery point of view (if you get an error, is it
because adding the address changed or was it cos fiddling with the
interface failed?), and because it reaches across subsystems.
> yep, I was part of a thread on @tech where this was discussed. To
> many years in network engineer where you explicitly bring an
> interface / port online.
i think it's a good habit.
> > > /etc/hostname.pair44
> > > rdomain 44
> > > group pair
> > > patch pair0
> >
> > this is the key line to "patch" those two together
>
> yep, the "issue" is the order interfaces are brought up, pair0
> comes up first, but I can't put "patch pair44" in that config
> because pair44 isn't up yet. I realize "patch pair44" isn't
> required, it is an artifact from the typo that took 6 days to
> discover.
/etc/netstart should create the pair interfaces before they're
configured. that's done in this bit of the file:
1.195 rpe 396:# Create all the pseudo interfaces up front.
1.191 dlg 397: vifscreate
and then they get configured via the ifmstart line just under this:
399: # Configure all the non-loopback interfaces which we
know about, but
1.127 deraadt 400: # do not start interfaces which must be delayed. Refer
to hostname.if(5)
1.217 dlg 401: ifmstart "" "aggr trunk svlan vlan carp pppoe tun tap
gif etherip gre egre nvgre eoip vxlan pflow wg"
you should read line 401 as "start everything except aggr, trunk,
svlan, etc".
> > > lladdr 00:00:C0:44:00:44
> > > inet 10.1.1.1/31
> > > up
> > > !ifconfig pair0 patch pair44
> >
> > and the above would just do the same again as 'patch pair0'
> >
> > > !route -q -T 0 add -inet 44.31.83.0/24 10.1.1.1
> >
> > So not much to reduce - yet that extra !ifconfig could be painful when
> > you start changing things inconsistently
> > --
> > pb
>
> yep, I should remove "!ifconfig pair0 patch pair44" from
> /etc/hostname.pair44 . Because I want the route added when the pair
> comes up I have to be aware of consistent destroy / add interfaces.
>
> thanks for your input,
you can also try rport(4) to replace pair(4) for p2p links between
rdomains.
> diana
>
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