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Date:      Wed, 29 Aug 2001 12:28:34 -0600
From:      Nate Williams <nate@yogotech.com>
To:        Toshihiko ARAI <toshi@jp.FreeBSD.org>
Cc:        nate@yogotech.com (Nate Williams), freebsd-mobile@FreeBSD.org, imp@FreeBSD.org
Subject:   Re: Documentation for rc.conf's removable_interfaces?
Message-ID:  <15245.13394.275183.61715@nomad.yogotech.com>
In-Reply-To: <200108281005.f7SA5bR50146.toshi@jp.FreeBSD.org>
References:  <15228.2988.181554.313833@nomad.yogotech.com> <200108200357.f7K3vMn18594.toshi@jp.FreeBSD.org> <15233.22136.524384.459698@nomad.yogotech.com> <200108211348.f7LDmTh30188.toshi@jp.FreeBSD.org> <15234.48176.6699.983659@nomad.yogotech.com> <200108231653.f7NGrO802605.toshi@jp.FreeBSD.org> <15237.14941.939157.115769@nomad.yogotech.com> <200108251732.f7PHWst26260.toshi@jp.FreeBSD.org> <15240.7812.511063.822660@nomad.yogotech.com> <200108281005.f7SA5bR50146.toshi@jp.FreeBSD.org>

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> > True.  However, it doesn't hurt to leave this route in place if there is
> > only one network card, because there can only be one 'default_router' in
> > the current configuration setup.
> 
> It is the truth in the simplest case, but we use more than one
> cards by a location (office, my home, etc...).

Good point.

> Of course cards
> to use simultaneously are always one.  In this case I can employ
> more than one default route by environment.  I assume a situation
> as follows.
> 
> A) ed1: static routing (non DHCP)
> 
> ifconfig_ed1="inet 10.0.4.1 netmask 255.255.255.0"
> static_routes_ed1="net1 net2"
> route_net1="default 10.0.4.2"
> route_net2="-net 10.0.5 10.0.4.3"
> 
> B) aue0: using DHCP
> 
> ifconfig_aue0="DHCP"
> 
> C) wi0: static routing
> 
> ifconfig_wi0="inet 192.168.0.1 netmast 255.255.255.0"
> static_routes_wi0="net3"
> route_net3="default 192.168.0.2"
> and I prepare '/etc/start_if.wi0'.
> 
> In this case, if I put 'removable_route_flush=YES', old route
> surely is eliminated including a case of DHCP.

Except there is no 'removalble_route_flush' variable in -stable
anymore. 

> >> > In particular, in one situation, I have 2 network cards in my computer.
> >> > If one type of card is removed (my test network), the routes should not
> >> > be touched.  However, if I remove/insert one the other cards (wireless
> >> > and/or ethernet for connection to the net), I need the route added
> >> > and/or removed.
> >> 
> >> In this case you can use static_routes_<interface> for replacement
> >> of defaultrouter.  This variable is the thing which I added anew,
> >> you replace it in real interface name and describe it in rc.conf as
> >> follows.
> 
> > Good idea.  I'm so used to hardcoding the default route on my desktop
> > boxes I never thought to modify the route.
> 
> 'static_routes_<interface>' exists only with /etc/pccard_ether.
> 'static_routes' is usable in /etc/rc.network.

*duh*  I should look more closely.

I still think it would be nice if we could 'backout' any routing changes
from static_routes_<interface> when a card was removed, which I think
would be the 'optimal' solution.

> > Very much agreed, but don't feel that it's solely your responsibility to
> > document everything.
> 
> Old document exists, but it is a thing about PAO.  Contents are
> considerably old, too.  In addition, good translation is
> necessary.

Certainly static_routes_<interface> should be documented.


Nate

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