From: Abdul (rslab007@gmail.com)
Date: Sat Aug 09 2008 - 13:44:17 ART
Chi,
The bottomline is if you fundamentally understand IGMP, and PIM, then
understanding the filtering will much more sence to you.
I would suggest go review the concepts again. I thought Peter's
explaination of the filtering was pretty clear.
On 8/9/08, Doan Dung Chi <dungchid@gmail.com> wrote:
> Thanks Peter !
> Can anyone explain more details (with example) ? Actually, I need to
> understand deeper these concepts to choose the best way when doing the LAB.
>
> Thanks
> ----- Original Message -----
> From: ehiwe peter
> To: Doan Dung Chi
> Cc: Cisco certification
> Sent: 09 August, 2008 02:59
> Subject: Re: [help] Multicast Filtering !
>
>
> igmp filter is similar to ip igmp access-group .
> the ip igmp filter is implemented on switches but the ip igmp access-group
> is implemented on routers.
> The igmp profile specifies the multicast groups to be filtered the same
> way
> the acl does in igmp access-group.
>
> But they(igmp filter,ip igmp access-group) both prevent hosts on a lan
> from
> joining(igmp) the multicast groups specified in the acl and igmp profiles.
>
> But the other two methods filters or creates boundaries for multicast
> traffic in any location of the multicast network unlike the igmp filter and
> igmp acces-group which are both limited to the lan segment.
>
>
>
> On 8/8/08, Doan Dung Chi <dungchid@gmail.com> wrote:
> Hi GS !
>
> To filtering multicast stream, we have some methods:
> 1. ip igmp access-group {ACL}
> 2. ip multicast boundary {ACL} in/out
> 3. ip access-group {ACL}
> 4. ip igmp filter {profile-number}
>
> Actually, I always confuse when choosing the method 1 & 2 & 3. With
> method
> 4,
> I don't understand how it work? And which situation is used ?. In my
> understand that:
> - "ip igmp access-group": filter base on "inbound direction"
> - "ip multicast boundary": filter base on "inbound/outboud direction"
> - "ip access-group": filter base on "inbound/outbound" (this method is
> not
> common)
> - "ip igmp filter {profile} : I don't understand this method. I read on
> DocCD
> "You can control the distribution of multicast services, such as IP/TV,
> based
> on some type of subscription or service plan. You might also want to
> limit
> the
> number of multicast groups to which a user on a switch port can belong."
>
> Can anyone clarify 4 above methods, please. (which scenario is used for
> each
> method)
>
> Thanks
>
> Chidd
>
>
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