From: Rich Collins (nilsi2002@gmail.com)
Date: Fri Nov 09 2007 - 17:51:00 ART
Hi Tarun,
I was just looking at your link and thought about something else
:basic concepts.
to quote from the link relating to Auto rp [Or even worse, some
interfaces are in sparse-dense mode, while others are in sparse mode.
But that is easy to spot, so we won't say more about it.]
Can you mix sparse-dense mode interfaces on some routers with other
routers using sparse-mode (plus ip pim autorp listener) or dense-mode
for no rp or sparse-mode with static rp?
As usual my question is Lab related and not best practices for the field.
thnks
Rich
On Nov 9, 2007 2:49 PM, Scott Vermillion <scott_ccie_list@it-ag.com> wrote:
> Hey Tarun,
>
> Well that certainly lays bare some important Auto RP behavior! So I gather
> that, in the way that it is typically being implemented as part of solutions
> to workbook labs, the deny statements are indeed an invalid configuration.
> That's not to say that they don't have a purpose, but rather that using them
> to define which groups a given RP will announce itself for is not an
> appropriate solution. So if that was indeed your goal (announcing certain
> groups), you would simply use permit statements only (and thus we have a
> real-world application for coming up with an ACL that uses permit statements
> only and also uses as few lines as possible!). The deny statements only
> come into play if you want to enforce DM behavior for a given group or
> range.
>
> Correct?
>
> Thanks much for that link!
>
> Regards,
>
> Scott
>
>
> -----Original Message-----
> From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] On Behalf Of
> Tarun Pahuja
> Sent: Friday, November 09, 2007 12:11 PM
> To: Scott Vermillion
> Cc: Guyler, Rik; Rich Collins; Chris Riling; Joseph Brunner; groupstudy
> Subject: Re: Soup-to-Nuts: MCAST Lab 5 - Auto RP with Multiple RP's
>
>
> Scott,
> Try reading the following two documents, If you still need
> assistance I will surely jump in and explain. I am slightly hesitant in
> giving a direct answer as the initial thread points to a specific workbook.
>
> ftp://ftpeng.cisco.com/ipmulticast/autorp.html#Commonerrors
>
> http://www.cisco.com/en/US/tech/tk828/technologies_configuration_example0918
> 6a00801cb923.shtml
>
> HTH,
> Tarun
>
>
>
>
> On Nov 9, 2007 1:45 PM, Scott Vermillion <scott_ccie_list@it-ag.com> wrote:
>
> > So Tarun,
> >
> > As I just mentioned in another thread, I've skipped ahead to the mcast
> > section of a CoD I'm in the middle of. It was not explained why,
> > precisely,
> > but it was clearly stated that only permit statements are a valid
> > configuration wrt group-list ACLs. So I still don't remember where I got
> > this the first time around, but now here I have it again a second time.
> > Also, it was specifically mentioned that the DocCD is less than stellar on
> > this particular topic (agreed!).
> >
> > And it would seem that Chris's findings support this idea that deny
> > statements are a problem (even though they can, of course, be entered into
> > the configuration).
> >
> > Any thoughts to help clarify this? Seems to be a recurring topic (not
> > quite
> > up there with the 14 second STP thing, but recurring nevertheless)...
> >
> > Regards,
> >
> > Scott
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