From: David Prall (dcp@dcptech.com)
Date: Wed Nov 14 2007 - 14:43:22 ART
Do you see any difference when you move to an address outside of the 224
address space. Use something like 225.1.1.1 instead. Are you putting the
address on a physical interface or vlan interface.
David
-- http://dcp.dcptech.com> -----Original Message----- > From: Wollmann, Bruno RQHR [mailto:Bruno.Wollmann@rqhealth.ca] > Sent: Wednesday, November 14, 2007 12:10 PM > To: David Prall; Gregory Gombas > Cc: Cisco certification > Subject: RE: Multicast on 3550/3560 > > I just disabled IGMP SNOOPING and still no response. I sent > a ping from > sw1 to 224.1.1.1 and both the r5 and sw1 respond to this but sw1 will > still not respond when the ping is generated from one of my routers. > > I have decided to stop using the switches as test hosts for multicast > and will only use the routers. > > Thanks for your help > Bruno > > -----Original Message----- > From: David Prall [mailto:dcp@dcptech.com] > Sent: November 14, 2007 9:32 AM > To: Wollmann, Bruno RQHR; 'Gregory Gombas' > Cc: 'Cisco certification' > Subject: RE: Multicast on 3550/3560 > > Most likely IGMP Snooping killing it. Have you tried disabling IGMP > Snooping, or configuring an IGMP Querier to support IGMP Snooping > without an IGMP router. > > David > > -- > http://dcp.dcptech.com > > > > -----Original Message----- > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] > On Behalf > > Of Wollmann, Bruno RQHR > > Sent: Wednesday, November 14, 2007 9:17 AM > > To: Gregory Gombas > > Cc: Cisco certification > > Subject: RE: Multicast on 3550/3560 > > > > Correct. IP IGMP JOIN-GROUP <group address> turns the > router into a > > multicast receiver/host which doesn't require multicast routing > > enabled on the router or PIM enabled on the interface. > It's just like > > > a PC that joins a multicast group. That PC doesn't have to route > > multicast packets, it just wants to receive them. > > > > I can't get the switches to behave the same way. > > > > Thanks > > Bruno > > > > -----Original Message----- > > From: nobody@groupstudy.com [mailto:nobody@groupstudy.com] > On Behalf > > Of Gregory Gombas > > Sent: November 14, 2007 7:49 AM > > To: Wollmann, Bruno RQHR > > Cc: Cisco certification > > Subject: Re: Multicast on 3550/3560 > > > > I thought routers also needed PIM enabled in order to > enable multicast > > > processing on the interface. Are you saying that is not the > case? Is > > that documented somewhere? > > > > Thanks, > > Greg > > > > On Nov 13, 2007 11:44 PM, Wollmann, Bruno RQHR > > <Bruno.Wollmann@rqhealth.ca> wrote: > > > Hello GS, > > > > > > Has anyone other than me had trouble getting a 3550 or 3560 > > to reply > > > to pings after using the IP IGMP JOIN-GROUP command? My switches > > > won't reply to pings unless I enable multicast routing on > them and > > > enable PIM on the interface. My routers only need to join > > the group > > > to reply to pings. I don't have to enable multicast > routing or PIM. > > > > > > My setup is simple. OSPF is running on all 4 devices so > > that r1 knows > > > > > about the r3,r5,sw1 network and sw1 and r5 know about the r1,r3 > > network. > > > I started off with more complicated configs as I was > doing practice > > > labs and was having problems getting them to work. To help > > > troubleshoot, I simplified things. r1 and r3 are running > > PIM DENSE on > > their interfaces. > > > Even when I send a ping from r3, r5 is the only device to > > reply, sw1 > > > does not. > > > > > > r1----p2pserial----r3-------sw1 > > > |-----r5 > > > > > > Is this normal behaviour for the switches. I've read the > > doc cd and I > > > > > think my setup should work without having to enable > > multicast routing > > > on the switches. I've tried this with routed interfaces and svi > > > interfaces on the switches. What am I missing? > > > > > > > > > http://www.cisco.com/univercd/cc/td/doc/product/lan/cat3560/12240se/sc > > > g/ > > > swmcast.htm > > > > > > > > > ______________________________________________________________________ > > > _ Subscription information may be found at: > > > http://www.groupstudy.com/list/CCIELab.html > > > > ______________________________________________________________ > > _________ > > Subscription information may be found at: > > http://www.groupstudy.com/list/CCIELab.html > > > > ______________________________________________________________ > > _________ > > Subscription information may be found at: > > http://www.groupstudy.com/list/CCIELab.html
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