From: Ruhann (groupstudy@ru.co.za)
Date: Tue Mar 24 2009 - 08:56:27 ART
one big difference between a main and multipoint is the why they handle
interface state when receiving lmi.
a physical interface, connected to a frame switch will be up/up, if it
receives lmi from that frame switch, regardless of the dlci it is learning
or not learning.
this means that a physical interface can be up/up, even though you do not
have layer2 communication, because your dlcis are down.
whereas when you have a multi-point sub-interface with multiple dlcis
defined, and all dlci's are inactive, the interface will show down/down,
but when you have one single dlci up, the interface will show up/up.
hth :)
On Thu, Mar 19, 2009 at 8:06 PM, Hotmail <hussamkibbi@hotmail.com> wrote:
> Hi Experts,
>
> I just need a clarification about multipoint interfaces:
>
> Is there a difference between Frame-Relay main interface & Frame Relay
> multipoint subinterface?
>
> I mean both can terminate multiple layer 2 circuits and need Layer 3 to
> Layer 2 resolution mapping.
>
> I just can notice that in "main interface" adding the "broadcast" keyword
> in
> mapping won't add anything as neighbor command in routing protocols must be
> issued since it is non-broadcast ? right?
>
>
> Regards,
>
> Hussam
>
>
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