From: Venkataramanaiah.R (vramanaiah@gmail.com)
Date: Tue Oct 11 2005 - 12:13:53 GMT-3
Ashok.. This behaviour makes perfect sense to me.. After it is the IGMP join
that you are preventing using the ip igmp access-group command. The (*,G)
that you are mentioning are the PIM joins sent by the downstream routers,
which obviously will not be filtered.
-Venkat
On 10/11/05, Ashok M A <ashok_ccie@yahoo.co.in> wrote:
>
> Adding to this, I could see "ip igmp access-group" has
> effect only if it is configured on the router where
> the hosts directly connected. This has no effect if
> configured on other router on the path towards the RP.
> I see (*,G) is not filtered if configured on the
> router on the path towards the RP.
>
> Corret me if I am missing something.
>
>
> Thanks & Regards,
>
> Ashok M A
>
> -----Original Message-----
> From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com] On Behalf Of simon hart
> Sent: Thursday, September 01, 2005 6:44 PM
> To: dusth@comcast.net; ccielab@groupstudy.com
> Subject: RE: ip multicast boundary vs. ip igmp
> access-group
>
> Dustin,
>
> The difference between the two commands are:
>
> ip multicast boundary - this will prevent mulicast
> traffic within the specified access list from
> transiting the interface, thus blocking the defined
> traffic.
>
> ip igmp access-group - this will prevent hosts within
> the attached subnet from joining multicast groups
> identified within the associated access list.
> This command does not stop the multicast traffic from
> transiting the interface (ie to a PIM neighbor), just
> stops the hosts from joining.
>
> HTH
>
> Simon
>
> -----Original Message-----
> From: nobody@groupstudy.com
> [mailto:nobody@groupstudy.com]On Behalf Of
> dusth@comcast.net
> Sent: 01 September 2005 13:43
> To: ccielab@groupstudy.com
> Subject: ip multicast boundary vs. ip igmp
> access-group
>
>
> Hello group,
> I'm confused the difference between < ip multicast
> boundary vs. ip igmp
> access-group>. I do not know exactly when to use one
> or the other. Is
> access-group><ip
> mulitcast boundary> command used when filter out only
> one single multicast stream? In contrast, is <ip igmp
> access-group> command used when need to filter a
> range of multicast stream?
> Please help.
> Thanks,
> Dustin
>
>
>
>
>
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