> Second, using default routes in the same option type of specific routes
> means that they'd share the same faith - if specific routes are wrongly
> configured in the same section of the config file, there is a risk that
> the default route is wrongly configured too.  Or, the default route is
> something of last resort, so it would be better to have it configured in
> a different place, communicated with a different ORO type.

Operationally it is always better for things to completely fail than to 
partially fail, because you see the problem immediately.   In the case of a 
DHCP server configuration problem, it's hard to see why it would be easier to 
misconfigure a DHCP server when there is a single option than when there are 
two.

> Third, if a single way of configuring default an specific routes with
> DHCP then this means that a bigger software implementation would be
> needed even for lightweight devices.  Or, lightweight devices only use a
> single route - the default route.

Do you know of any specific devices that have this problem?

> I suggest we separate the default route ORO from the specific routes ORO.

I think this is a good way to solve the problem you have described, but I don't 
think the problem needs to be solved.   I'd be interested to hear a specific, 
concrete use case for this.
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