From: Igor M. (imanassypov@rogers.com)
Date: Sat Aug 23 2008 - 13:48:53 ART
Thanks for clarification Rick,
-appreciate your help
----------------------
I.M., M.Eng. P.Eng.
Network Architect
CI Investments
----------------------
--- On Sat, 8/23/08, Rick Mur <rick.mur@gmail.com> wrote:
From: Rick Mur <rick.mur@gmail.com>
Subject: Re: bsr multicast group scoping
To: "Igor M." <imanassypov@rogers.com>
Cc: "Cisco certification" <ccielab@groupstudy.com>
Received: Saturday, August 23, 2008, 12:41 PM
The /5 mask works exactly the same with multicast as it does with
unicast addresses.
So the 224.0.0.0/5 means: 224.0.0.0 - 231.255.255.255
And the 232.0.0.0/5 means: 232.0.0.0 - 239.255.255.255
Because you can't have a RP for the admin-scoped addresses you'll have
to filter them out in an access-list
Example:
access-list 1 deny 239.0.0.0 0.255.255.255
access-list 1 permit 232.0.0.0 7.255.255.255
And with the filter, the BSR doesn't elect a RP for a group, it just
passes a list with possible RPs and the routers make the decision.
So you will have to filter on the RP itself with the group-list command.
Rick
On 23 aug 2008, at 09:30, Igor M. wrote:
> Hi,
>
> I have a question regarding multicast group scoping. Can someone
> please help me understand what the following requirement implies?
>
> - Configure R3 to assign R1 as the RP for the groups in the range
> 224.0.0.0/5, and R2 as the RP for groups in range 232.0.0.0/5.
> Groups in administratively scoped mcast range should not be
> distributed throughout the multicast domain.
>
> I have a problem with the /5 mask, - how do you calculate which
> groups that will be covering in this case?!
>
> And, once calculated, - can you rp-filter on the BSR router similar
> to that of auto-rp with rp-announce-filter?
>
>
> Thanks for you help!
>
> ----------------------
>
> I.M., M.Eng. P.Eng.
>
> Network Architect
>
> CI Investments
>
> ----------------------
>
>
> Blogs and organic groups at http://www.ccie.net
>
> _______________________________________________________________________
> Subscription information may be found at:
> http://www.groupstudy.com/list/CCIELab.html
Blogs and organic groups at http://www.ccie.net
This archive was generated by hypermail 2.1.4 : Mon Sep 01 2008 - 08:15:32 ART