From: Manuel Berrocal (manueliux@xxxxxxxxx)
Date: Tue Apr 04 2000 - 13:56:01 GMT-3
the command "ip ospf network point-to-multipoint" is not doing anything to
the interface (e.g. like making it multipoint), it's just telling OSPF to
treat that interface as if it were a point to multipoint interface. OSPF
behaves differently based on the interface type you specify (or its default).
You can use subinterfaces with Frame Relay for example, to tie together a set
of virtual circuits to form a virtual interface, which acts as a single IP
subnet. Usually all systems within the subnet should be fully meshed, but if
you use the ip ospf network point-to-multipoint command then you don't
require a fully-meshed topology. Also in the same interface you can make
another subinterface and tie together another set of VCs acting as a
different single subnet...
--- Aaron DuShey <adushey@yahoo.com> wrote:
> r6(config)#int se0.1 ?
> multipoint Treat as a multipoint link
> point-to-point Treat as a point-to-point link
>
> r6(config)#int se0.1 multi
>
> interface Serial0
> ip address 10.0.1.1 255.255.255.0
> ip ospf network point-to-multipoint non-broadcast
> encapsulation frame-relay
> no keepalive
> frame-relay local-dlci 200
> frame-relay map ip 10.0.1.3 202
> frame-relay map ip 10.0.1.4 203
> frame-relay map ip 10.0.1.5 204
>
> Where would the subinterface multipoint be useful? What is the difference
> between a multipoint sub-interface and a multipoint ospf network interface?
> thanks
>
> Aaron DuShey
>
>
>
>
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