Re: Frame Relay

Hi Faizan,
if your question is "can a broadcast/multicast go from spoke R4 to spoke R5
passing through hub R3", the answer is no.
You cannot form spoke to spoke neighborship using multicast.

To obtain spoke to spoke rechability you have (at least) two option:
1) trust on IGP features/design like "eigrp next-hop self at hub" or "ospf
point-to-multipoint[-broadcast] type"
2) leave inalterate IGP next-hop at hub, and use additional frame-realay map
on each spokes to reach next-hop through hub pvc.

HTH,
mirco.

On Sun, May 30, 2010 at 12:51 PM, faizan khurshid <
faizankhurshid921_at_hotmail.com> wrote:

> To Group :
>
>
> Want to resolve ambiguity
>
>
> In HUB & SPOKE topology if you try communicate between spoke to spoke
> and
> protocol your are using for communicate use broadcast and Multicast for
> their
> update use must add broadcast in frame-relay map command
> reason in frame relay treat each PVC treat as diff broadcast domain
>
>
> in other sources i read
>
>
> if you try to communicate between spokes let say R5 (spoke)want to
> communicate R4(spoke)and R3 is (hub)
>
> if R5 add broadcast keyword in frame-relay mapping and use R4 IP add
> when it reaches to R3 hub it has no idea where i have to send because
> of
> destination address is broadcast
> so we left off broadcast keyword to success-full communication
>
>
>
>
>
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Received on Mon May 31 2010 - 22:59:43 ART