From: Scott Morris (swm@emanon.com)
Date: Fri Mar 12 2004 - 16:23:59 GMT-3
That is the part of nbma-mode we most think about. The other half of it has
to do with not process-switching multicast packets and treating them as
"pseudobroadcasts" where they go out the broadcast hardware queue and
potentially tie up your line.
That's just a function of handling broadcast/multicast packets over an
nbma-type network when using your routing protocols and the 'broadcast'
parameter on map statements (or the like).
HTH,
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@emanon.com/smorris@ipexpert.net
http://www.ipexpert.net
PS.
http://www.cisco.com/en/US/tech/tk828/tk363/technologies_white_paper09186a00
800d6b61.shtml
-----Original Message-----
From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
Brian McGahan
Sent: Friday, March 12, 2004 12:50 PM
To: 'Packet Man'; ccielab@groupstudy.com
Subject: RE: IP PIM nbma-mode
If there is only a single circuit on the interface it would not be
appropriate to configure nbma mode, however it wouldn't really do anything
bad.
The point of nbma mode is to associate a particular circuit in the
outgoing list instead of the interface itself. This is accomplished by
associating the neighbor IP address instead of the interface. In the case
that there is only one neighbor on the interface, associating either the
interface or the neighbor ip address in the OIL would accomplish the same
thing.
HTH,
Brian McGahan, CCIE #8593
bmcgahan@internetworkexpert.com
Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> Of Packet Man
> Sent: Friday, March 12, 2004 11:39 AM
> To: ccielab@groupstudy.com
> Subject: IP PIM nbma-mode
>
> Hi guys,
>
> In Solie's PS II, his example shows "ip pim nbma-mode" configured on
> all p2m interfaces connected to the F/R network. I thought this was
> only needed on the hub router - not on the spoke routers.
>
> Is this a mistake in my thinking or has Solie made another mistake?
>
> Also, if this command is needed on the spoke routers, could someone
> explain why.
>
> Thanks in advance, pm
>
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