As long as there is a multicast router connected to the switch, and CGMP is enabled on that switch, then yes, the router will control flooding of multicast traffic on the switch ports.
CM ----- Original Message ----- From: "Fears Michael S SSgt 50 CS/SCBBN" To: Sent: Friday, February 01, 2002 1:57 PM Subject: RE: multicast / CGMP towards the multicast server [7:33964] > Nigel, Thanks, Yes the switch and users are all on the same VLAN. PIM and > IGMP > are working fine across the router and into other CGMP enable switches. > The thing I was not sure of, was: if I have a server multicasting > on the same switch/VLAN as other users, can I prevent the multicast > stream from flooding the broadcast domain that the server is in? > > I was asked this question and my answer was "no". I thought it was just poor > design > to have the multicast server on the same VLAN as the users who are not using > it. > > Maybe I'm wrong?? > > > > > > -----Original Message----- > From: Nigel Taylor [mailto:[EMAIL PROTECTED]] > Sent: Thursday, January 31, 2002 8:19 PM > To: [EMAIL PROTECTED] > Subject: Re: multicast / CGMP towards the multicast server [7:33964] > > > Michael, > Of course this would depend on if the multicast server and the > host connected on the same switch was assigned to the same vlan(broadcast > domain). Just some quick points to mention.. > > Routers by default will not forward multicast traffic. However, if you > enabled a multicast routing protocol(PIM, DVMRP) then this is possible. The > important thing here is that IGMP is used by hosts to inform routers of > their intent to become part of a multicast stream. This depends on your > implementation of the multicast protocol. IGMPv2 has been improved to > support leaves from a multicast group which is not supported in IGMPv1. > This way the host is able to notify the source of it's intent to leave the > multicast group. This is will allow the routers to prune the multicast > traffic from the segment removing the unnecessary traffic, providing no > other host on the segment remains a member of the multicast stream > > A good title as recommended by a number of folks on the list is Developing > IP Multicast Networks > Author: Beau Williamson. ISBN: 157870779 > > HTH > > Nigel > > > > ---- Original Message ----- > From: "Fears Michael S SSgt 50 CS/SCBBN" > To: > Sent: Thursday, January 31, 2002 4:59 PM > Subject: multicast / CGMP towards the multicast server [7:33964] > > > > If a multicast server is connected to a Cisco Switch running CGMP, and > > several hosts are connected to the same switch, will a router turn off the > > switch ports for the users that are not requesting the multicast? > > > > So, will CGMP work back towards the multicast server? > > > > Fears Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34055&t=33964 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
