Hi Alex
In point-to-multipoint network, a DR will be elected and the DR will
multicast the message to all the ospf routers. Where else in point-to-point
network, there are no DR selection and thats why either we rely on the
inverse arp or manually configure it.
----William
""Alex Lee"" wrote in message
[EMAIL PROTECTED]">news:[EMAIL PROTECTED]...
> Still do not understand,
>
> Building Scalable Cisco Networks, CiscoPress, page 123
> ".... However,bcause the point-to-multipoint mode treats the network as a
> collection of point-to-point links, multicast hello packets discover
> neighbors dynamically, and statically configuring neighbors is not
> required."
>
> Routing TCP/IP, Vol. 1, page 433
> "On broadcast and point-to-point network types, hellos are multicast to
> AllSPFRouters (224.0.0.5). On NBMA, point-to-multipoint, and virtual link
> network types, hello are unicast to individual neighbors. The implication
of
> unicasting is that router must first learn of the existence of its
neighbors
> either through manual configuration or an underlying mechanism such as
> Inverse ARP."
>
> What have I missed ?
Message Posted at:
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