From: Long Kwok (lkwok@ccieunix.com)
Date: Sun May 01 2005 - 18:21:39 GMT-3
Thanks for the link Pierre, that is a very good explanation of how the
broadcast mechanism works not only in multicast , but over nbma in
general. I still have doubts / curiosities of when to use the "ip pim
nbma-mode" feature though , so let me ask it another way , if you know
the solution is going to be pim sparse or sparse-dense mode , would you
always put "ip pim nbma-mode" on the hubs multipoint interface weather
that interface is the physical interface or a logical multipoint
subinterface , if no why not ?
TIA , Long
-----Original Message-----
From: Pierre-Alex Guanel [mailto:paguanel@hotmail.com]
Sent: Sunday, May 01, 2005 1:55 PM
To: Long Kwok
Subject: Re: Multicast "ip pim nbma-mode" Scenarios
When using ip pim nbma-mode ONLY use sparse-mode and put it on the hub
AND
the spokes
example bellow:
http://www.cisco.com/en/US/tech/tk828/technologies_white_paper09186a0080
0d6b61.shtml#xtocid9
Good luck
Pierre-Alex
----- Original Message -----
From: "Long Kwok" <lkwok@ccieunix.com>
To: <ccielab@groupstudy.com>
Sent: Sunday, May 01, 2005 9:02 PM
Subject: Multicast "ip pim nbma-mode" Scenarios
> The "ip pim nbma-mode" from what I understand is used to change the
> queuing mechanism on a frame-relay configured interface , and to also
> change the way that a hub router with multicast enabled reacts to
> dense-mode receivers prune messages ? So then exactly in what
scenarios
> is ip pim nbma-mode required ? Would it be safe to say if I have a
> partially meshed frame-relay topology with say R1 the hub and R2
through
> R6 possible receivers , would you always put ip pim nbma-mode on R1's
> serial interface , in either sparse or sparse-dense mode ?
>
>
>
> TIA , Long
>
>
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