route cacheing for gif(4) should be optional

[Gleb Smirnoff]

On Thu, Nov 25, 2004 at 09:55:10PM -0500, James wrote:
J> On Thu, Nov 25, 2004 at 05:06:41PM +0300, Gleb Smirnoff wrote:
J> >   Back to this problem:
J> > 
J> > http://freebsd.rambler.ru/bsdmail/freebsd-net_2004/msg01305.html
J> > 
J> > I've found two more people who dislike this feature of gif(4).
J> > So I'd like to make it optional. 
J> > 
J> > We already have LINK2 flag removing sourceroute filter from gif(4),
J> > which is commonly used in asymmetrically routed networks. I suggest
J> > to use this flag also for disabling route cacheing, since asymmetricity
J> > often appears in dynamically routed networks, and if one runs dynamic
J> > routing, he probably wants to remove route cacheing, too.
J> 
J> I'd think we should create a separate option for removing the route
J> cache. Sometimes, certain people want to use the tunnel at the highest
J> maximum performance possible with both sourceroute filter disabled
J> and tunneling routes allocated at their creation time. Perhaps link3 is a
J> good place for this option?

There is no LINK3 flag :)

However, gif(4) does not use LINK0 flag. It was used in past. We can utilize
it now. Any objections? 

-- 
Totus tuus, Glebius.
GLEBIUS-RIPN GLEB-RIPE