Re: OSPF host route

Point-To-Multipoint and Point-To-Multipoint non-broadcast treat things as a
series of p2p links and change the next-hop. Broadcast/non-broadcast do not
change next-hop. So, in a typical hub and spoke with routers A, B, C where
B is a hub

1) With point-to-multipoint or point-to-multipoint nonbroadcast C would see
A's routes with a next hop of B and visa versa
2) with broadcast/nonbroadcast C would see A's routes with a next-hop of A
and visa versa

In other words, point-to-multipoint takes into account the layer 2 topology
whereas broadcast/non-broadcast assume everybody is reachable off the same
"segment". This is also why with point-to-multipoint you don't necessarily
need frame-relay maps for the other spoke -- so long as the next-hop (hub)
is mapped, you have reachability

HTH

On Thu, Oct 13, 2011 at 1:34 AM, me you <anunda19_at_gmail.com> wrote:

> I am looking for information on how the different OSPF network handle
> nexthop and host routes. From what I understand Point-to-mulitpoint will
> install a specific host route for each destination network, and it will
> also
> change the next-hop address. Tried google but I did not find anything
> explaining how the different network types work in the regards.
>
> If someone could point me in the right direction I would appreciated it,
> but
> it would be better if you spoon-feed me and tell me what, so I don't have
> to
> read or think.
>
> Thank you
> Rob
>
>
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Regards,
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CCIE #24347
Blog: http://astorinonetworks.com
"He not busy being born is busy dying" - Dylan
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