A router must have at least one IP address in it somewhere, be it
bound to a loopback or whatnot.
There's nothing wrong with advertising it in multiple areas, though
particular implementations may or may not let you do so. Putting it
in only one area and advertising a summary into other areas would have
the same effect at forwarding time.
Lots of room for implementation choices here.
--Dave
On Aug 10, 2009, at 12:59 PM, Joakim Tjernlund wrote:
I got routers which only have unnumbered PtoP interfaces and I wonder
how to advertise a host route as described in RFC 2328:
[2]It is possible for all of a router's interfaces to be unnumbered
point-to-point links. In this case, an IP address must be assigned
to the router. This address will then be advertised in the
router's
router-LSA as a host route.
The first that comes to mind is to just assign an IP address/32 to
the loopback or dummy interface and start OSPF on that I/F. However,
you
can only assign one area to that I/F. How have other people
solved this?
Ideally there would be a command that lets me assign a
IP address which will be advertised in all areas.
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