From: Arun Arumuganainar (aarumuga@hotmail.com)
Date: Fri Oct 14 2005 - 12:37:14 GMT-3
Hi Scott and Ryan
Broadcasts are handled by a separate software queue in Frame Relay called
the Frame Relay broadcast queue. The frame-relay broadcast-queue command is
used in the interface mode to create a special queue to hold broadcast
traffic.
Under normal condition there is no need to tune this broadcast Queue . But
in cast you network is larger( then number routing protocol updates could
be very large ) or you run too much of Multicast data traffic then in such
a case Routing protocol updates might get tail drops. This may result in
inconsistent routing .In such scenarios mandates tuning of this broadcast
queue ( I remember doing a exercises on Broadcast Queue in Ex 39 on IP
Expert Series 7.0 ).
Could you guys confirm whether you are referring Frame-relay broadcast queue
!!! In case I am wrong pls. do let me know exactly what you are looking for
( Exact wording from the questions would be very helpful ) !!!!
Thanks and Regards
Arun
----- Original Message -----
From: "Scott Morris" <swm@emanon.com>
To: "'The Great Ryan'" <pv.ryan@gmail.com>
Cc: "'Cisco certification'" <ccielab@groupstudy.com>
Sent: Friday, October 14, 2005 5:58 PM
Subject: RE: Broadcast Queue & Normal Interface Queue in Serial Interface
> I suppose that would depend on the topology design. But if it's your hub,
> I'd say yes.
>
> The pim nbma mode is a sub-interface command, although its classification
of
> things will affect how the physical interface/hardware queues handle the
> traffic.
>
> Scott
>
> -----Original Message-----
> From: The Great Ryan [mailto:pv.ryan@gmail.com]
> Sent: Friday, October 14, 2005 7:57 AM
> To: swm@emanon.com
> Cc: Cisco certification
> Subject: Re: Broadcast Queue & Normal Interface Queue in Serial Interface
>
> Ok,
>
> If I have the following scenario running multicast, should I enable "ip
pim
> nbma" on the main interface, on sub-interfaces or All interface?
>
> interface Serial 0/0
> encapsulation frame-relay
> ip pim nbma <-?
> !
> interface Serial 0/0.1 multipoint
> description Connect to RP
> ip pim nbma <-?
> !
> interface Serial 0/0.2 multipoint
> description Connect to Router running "ip igmp join-group"
> ip pim nbma <-?
> !
>
>
> If there is only one hardware broadcast queue, only main interface should
be
> applied? I'm really in lose.
>
> Thanks !
> Ryan
>
> 2005/10/14, Scott Morris <swm@emanon.com>:
> > These are hardware queues you are referring to.
> >
> > Queues in general belong to the physical interface only. Only when
> > you employ shaping does a queue get created (in software) for the
> sub-interface.
> >
> > HTH,
> >
> > Scott
> >
> > -----Original Message-----
> > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf
> > Of The Great Ryan
> > Sent: Friday, October 14, 2005 6:16 AM
> > To: Cisco certification
> > Subject: Broadcast Queue & Normal Interface Queue in Serial Interface
> >
> > Hi, Group,
> >
> > As I know, there are two type of queues in Serial Interface, Broadcast
> > Queue & Normal Queue. If I configure multiple-point interface or
> > point-to-point interface, the IOS will create another Broadcast/Normal
> > Queue for these subinterface?
> >
> > e.g.
> > interface Serial 0/0
> > encapsulation frame-relay
> > interface Serial 0/0.1 multipoint
> > interface Serial 0/0.2 point-to-point
> >
> > How many queues in Serial 0/0?
> > 1 broadcast & 1 Normal queue for each subinterface ?
> >
> >
> > Thanks
> > Ryan
> >
> > ______________________________________________________________________
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