From: joshua lauer (jslauer@hotmail.com)
Date: Wed Jan 19 2005 - 09:54:23 GMT-3
My advice would be,
look at the physical topology, it's going to drive your configuration
process. Look at your unicast route-tables and where the scenario tells you
to place pim on interfaces, this will drive your multicast route
tables/topology.. Once you get that down and you have a mcast source you can
trace the multicast path through the network. Find your hub in this
topology. If the scenario is telling you to send data to ONLY the router
that requested the feed then that's your clue. It's all about the clues :)
Find them and interpret them to find out what commands to use.
jl
Joshua Lauer
RHCE, MCSE, CCNA, CCDA, CCDP, CCNP, CCIP, CCSP,INFOSEC, CEH
----- Original Message -----
From: "Adebola Adegbonmire [ MTN - UBA ]" <AdebolaA@mtnnigeria.net>
To: "'joshua lauer'" <jslauer@hotmail.com>; <ccielab@groupstudy.com>
Sent: Wednesday, January 19, 2005 7:27 AM
Subject: RE: IEWBS lab 2 task 7.6 - 7.7
> Thanks Josh,
> Topology is 4 routers all in a full-mesh and all using main interface
> (multipoint default). So, whichever router the multicast source comes
> through going to another site, the issue arises in my opinion. Answer is I
> put on all 3 routers participating in the multicast network.
>
> Catch is solution puts on only Router-RP and later task says source is
> behind the RP. Still If I had a question just asking for PIM-SM to be set
> up
> on such a topology, does not specify source explicitly what would the
> advice
> be? Or would this only be valid on RP? Though one would expect RP was
> chosen
> with multicast source taken into consideration. Though I would risk the
> lab
> on such assumptions.
>
> Any thots?
>
> Bola
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com]On Behalf Of
> joshua lauer
> Sent: 19 January 2005 11:48
> To: Adebola Adegbonmire [ MTN - UBA ]; ccielab@groupstudy.com
> Subject: Re: IEWBS lab 2 task 7.6 - 7.7
>
> Question,
>
> In your lab did you put ndma mode on ALL the interfaces? I think that's
> your
> dilemma. Is the topology a hub and spoke? I believe it may be....You only
> need NBMA mode on the hub mate, If that's what you did then I think your
> good to go. Think about what NBMA mode does and if the scenario called for
> it I think you are ok. Commands in the real lab will most likely not be
> explicity mentioned...your expected to know what goes where unless they
> tell
> you yes or no.
>
> regards,
>
> josh
>
> jl
>
>
> Joshua Lauer
>
> RHCE, MCSE, CCNA, CCDA, CCDP, CCNP, CCIP, CCSP,INFOSEC, CEH
>
> ----- Original Message -----
> From: "Adebola Adegbonmire [ MTN - UBA ]" <AdebolaA@mtnnigeria.net>
> To: <ccielab@groupstudy.com>
> Sent: Wednesday, January 19, 2005 3:21 AM
> Subject: IEWBS lab 2 task 7.6 - 7.7
>
>
>> Hi All,
>> I was working on this lab. I quite agree with the solution to the
>> question,
>> but I have a question. The scenario described in task 7.6 is a common
>> issue
>> with PIM-SM over NBMA (frame-relay) multipoint interfaces. When reading
>> task
>> 7.1 - 7.3 and configuring solution, seeing that PIM-SM needed to be set
>> up
>> over frame-relay multipoint interfaces I had gone ahead to put ip pim
>> nbma-mode on all such interfaces. Then I get to task 7.6-7.7.
>>
>> My question is in the real lab if I have a scenario such as this but
>> without
>> the explicit wording of task 7.6 -7.7 describing issues that arises over
>> such interfaces, I would have done the same, knowing the fact that the
>> right
>> way is this. Would this be wrong? Would I lose points if I do not put in
>> the
>> ip pim nbma-mode command since the issue is not explicitly mentioned in
>> the
>> task or would this be a proctor candidate question in your opinion?
>>
>> Regards,
>> Bola
>>
>>
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