From: NET HE (he_net@hotmail.com)
Date: Mon Oct 15 2007 - 00:06:01 ART
I'd like to share my understanding with you.
Multicast boundary is to only check destination address of multicast stream
and can be used between routers or between routers and hosts.
IP Igmp access group is to only check incoming IGMP report messages and is
used between routers and hosts.
Any input are welcome.
Best Regards, Net (Xin) He > Date: Fri, 12 Oct 2007 13:42:56 +0100> From:
cisco2study@gmail.com> To: ccielab@groupstudy.com> Subject: Multicast boundary
or ip igmp access group> > Hello,> > I have had this doubt in my head for
quite a while. I thought we used the> multicast boundary command to limit the
scopt of the administratively> scopped m-cast addresses. the Doc CD defines
it's use,> > "Use this command to configure an administratively scoped
boundary on an> interface to filter multicast group addresses in the range
defined by the *> access-list* argument. A standard access list defines the
range of addresses> affected. When this command is configured, no multicast
data packets are> allowed to flow across the boundary from either direction.
Restricting> multicast data packet flow enables reuse of the same multicast
group address> in different administrative domains."> > > Then to define the
ip igmp access-group command,( which would see to be for> limiting access to
specify m-cast feeds in particular)> > To control the multicast groups that
hosts on the subnet serviced by an> interface can join, use the *ip igmp
access-group* command in interface> configuration mode. To disable this
control, use the *no* form of this> command.> > > So, are these two commands
complete interchangeable?........i understand> that there may be added
fuctionality on the boundary command....but i guess> we can use the igmp
access-group command also it limit auto-rp> advertisements. I would need to
lab this.> > If you have a clear understanding of the relationship between the
commands,> I would appreciate your opinion.> >
This archive was generated by hypermail 2.1.4 : Fri Nov 16 2007 - 13:11:14 ART