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That’s correct. For example in a catalyst switch you could you apply the igmp profile on an access port and the igmp access-group on the SVI (interface vlan) Look at this example: int vlan 10 ip igmp access-group 1 int f0/1 sw mode access sw access vlan 10 ip igmp filter PROFILE int f0/2 sw mode access sw access vlan 10 IGMP join received on f0/1 will be filtered against the profile PROFILE first and against the access-list 1 later. IGMP join received on f0/2 will be only filtered by the ACL. Also the “ip igmp filter” prevents IGMP *snooping* (L2 mcast) from learning about group membership on a port and indirectly affects IGMP (L3 mcast) since it drops these joins. The igmp access-group only prevents IGMP (L3 mcast) from learning about the group membership . To summarize: one command only affect L3 multicast forwarding, the other affect L2 mcast switching and L3 mcast forwarding as well. HTH Sabrina
—– Original Message —- From: Ivan To: ccielab@groupstudy.com; Paul Thomas Sent: Wednesday, August 30, 2006 10:21:49 AM Subject: Re: IP IGMP profile and Access group
In my understanding ip igmp profile used on switched port and ip igmp access-group used on routed port.
On Wednesday 30 August 2006 20:02, Paul Thomas wrote: > Hi, > > I don’t understand the difference between — IP IGMP profile and IP IGMP > Access group. > > Can any one explain it in more detail. > Thanks. > > _______________________________________________________________________ > Subscription information may be found at: > http://www.groupstudy.com/list/CCIELab.html
– Ivan