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RE: RE: IP PIM nbma-mode posted 03/13/2004
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For the join/leave portion of functionality that's correct.  For the
treatment of the multicasts in reference to the hardware queue and process
switching, that benefit will be seen whether you are in sparse or dense
mode.

 
Scott Morris, CCIE4 (R&S/ISP-Dial/Security/Service Provider) #4713, CISSP,
JNCIS, et al.
IPExpert CCIE Program Manager
IPExpert Sr. Technical Instructor
swm@xxxxxxxxxx/smorris@xxxxxxxxxxxx
http://www.ipexpert.net
 
 

-----Original Message-----
From: nobody@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf Of
Brian McGahan
Sent: Friday, March 12, 2004 2:57 PM
To: 'Richard Dumoulin'; ccielab@xxxxxxxxxxxxxx
Subject: RE: RE: IP PIM nbma-mode

         Technically it can also be used in a sparse-dense configuration,
but will only be applicable to groups that are in sparse mode, as it
requires the explicit join messages that are inherent to sparse-mode
operation.

HTH,

Brian McGahan, CCIE #8593
bmcgahan@xxxxxxxxxxxxxxxxxxxxxx 

Internetwork Expert, Inc.
http://www.InternetworkExpert.com
Toll Free: 877-224-8987 x 705
Outside US: 775-826-4344 x 705

________________________________________
From: Richard Dumoulin [mailto:richard.dumoulin@xxxxxxxx]
Sent: Friday, March 12, 2004 1:50 PM
To: richardyun@xxxxxxxxxxxx; Brian McGahan; 'Packet Man';
ccielab@xxxxxxxxxxxxxx
Subject: RE: RE: IP PIM nbma-mode

Hi
"This command applies to only PIM sparse mode configurations because its
functionality is dependent on the PIM sparse mode join message." 
taken from Scott's link,
--Richard
-----Mensaje original-----
De: richardyun@xxxxxxxxxxxx [mailto:richardyun@xxxxxxxxxxxx] Enviado el:
viernes, 12 de marzo de 2004 20:40
Para: Brian McGahan; 'Packet Man'; ccielab@xxxxxxxxxxxxxx
Asunto: Re: RE: IP PIM nbma-mode 

Hi Brian,
Isn't "ip pim nbma-mode" used primarily for "ip pim sparse-mode" and not for
"ip pim sparse-dense-mode"? 
Correct me if I'm wrong. 
Thanks,
Richard 
> 
> From: "Brian McGahan" <bmcgahan@xxxxxxxxxxxxxxxxxxxxxx>
> Date: 2004/03/12 Fri PM 01:27:13 EST
> To: "'Packet Man'" <ccie2b@xxxxxxxxxxx>,  <ccielab@xxxxxxxxxxxxxx>
> Subject: RE: IP PIM nbma-mode
> 
> > Now, just to be 100% sure, you're saying that on the spoke F/R 
> > routers, nbma-mode isn't needed, but having it there doesn't do any 
> > harm. And, as

> > long as it's configured on the hub F/R router everything's OK. correct? 
> 
>       It's best not to associate general rules with configuration.  
> Know what problem PIM NBMA mode is used to address.  If you see this 
> problem occur, then you know when it appropriate to use PIM in this
fashion.
> 
> > Also, if a F/R interface has p2m subinterfaces, does it matter 
> > whether
the 
> > multicast interface commands (ip pim sparse-dense-mode, ip pim
nbma-mode) 
> > are configured on the physcial interface or p2m sub-interfaces? 
> 
>       Yes is must be on the interface where the IP address is 
> configured and where PIM is enabled.
> 
> > PS: How do manage to keep so much info in your head?  It seems like 
> > you never suffer from leaky bucket syndrone.  How is that?
> 
>       Most of it I just make up, but no one seems to no the difference 
> ;)
> 
> 
> HTH,
> 
> Brian McGahan, CCIE #8593
> bmcgahan@xxxxxxxxxxxxxxxxxxxxxx
> 
> Internetwork Expert, Inc. 
> http://www.InternetworkExpert.com
> Toll Free: 877-224-8987 x 705
> Outside US: 775-826-4344 x 705
> 
> 
> > -----Original Message----- 
> > From: Packet Man [mailto:ccie2b@xxxxxxxxxxx] 
> > Sent: Friday, March 12, 2004 12:21 PM 
> > To: bmcgahan@xxxxxxxxxxxxxxxxxxxxxx; ccielab@xxxxxxxxxxxxxx 
> > Subject: RE: IP PIM nbma-mode 
> > 
> > Thanks, Brian. 
> > 
> > Now, just to be 100% sure, you're saying that on the spoke F/R routers, 
> > nbma-mode isn't needed, but having it there doesn't do any harm. And, as

> > long as it's configured on the hub F/R router everything's OK. correct? 
> > 
> > Also, if a F/R interface has p2m subinterfaces, does it matter whether
the 
> > multicast interface commands (ip pim sparse-dense-mode, ip pim
nbma-mode) 
> > are configured on the physcial interface or p2m sub-interfaces? 
> > 
> > thanks again. 
> > 
> > PS: How do manage to keep so much info in your head?  It seems like you 
> > never suffer from leaky bucket syndrone.  How is that? 
> > 
> > 
> > 
> > 
> > >From: "Brian McGahan" <bmcgahan@xxxxxxxxxxxxxxxxxxxxxx> 
> > >To: "'Packet Man'" <ccie2b@xxxxxxxxxxx>,<ccielab@xxxxxxxxxxxxxx> 
> > >Subject: RE: IP PIM nbma-mode 
> > >Date: Fri, 12 Mar 2004 11:49:33 -0600 
> > > 
> > >   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@xxxxxxxxxxxxxxxxxxxxxx 
> > > 
> > >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@xxxxxxxxxxxxxx [mailto:nobody@xxxxxxxxxxxxxx] On Behalf

> > Of 
> > > > Packet Man 
> > > > Sent: Friday, March 12, 2004 11:39 AM 
> > > > To: ccielab@xxxxxxxxxxxxxx 
> > > > 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 
> > > > 
> > > > _________________________________________________________________ 
> > > > Fast. Reliable. Get MSN 9 Dial-up - 3 months for the price of 1! 
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