From: Doan Dung Chi (dungchid@gmail.com)
Date: Sat Aug 09 2008 - 12:59:24 ART
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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