I was referring to INTRA VLAN not INTER as the title implied. The Cisco url below is a good read which will explain in detail what I am referring to. This doc also provides several additional solutions you could use to resolve your issue.
http://www.cisco.com/en/US/products/hw/switches/ps708/products_tech_note09186a008059a9df.shtml#understand Corey On Thu, Mar 1, 2012 at 6:11 PM, J D'Silva <[email protected]> wrote: > I think you guys are all over thinking this one. If it's really INTRA VLAN > multicast as described in the OP (and not INTER as the subject suggests) > then all this IGMP and multicast routing talk is moot. If the original > question is does multicast flow over a trunk by default, then the answer is > most certainly "yes". If it wasn't then we wouldn't be able to bring up an > OSPF or EIGRP adjacency in a good number of IPexpert labs. All of the > routers are interconnectged via switches, and a lot are using > subinterfaces. > > I like that SFP thing though. That's a weird one I'll have to remember for > the future. > > Jason > > On Thu, Mar 1, 2012 at 4:15 PM, Ben Hughes <[email protected]> wrote: > > > So long as there is a router or some device with IGMP and PIM running > > connected to the VLAN you wouldn't need to have multicast-routing enabled > > on the switch. > > > > cheers, > > Ben. > > > > From: Jay McMickle <[email protected]<mailto:[email protected] > >> > > Date: Thu, 1 Mar 2012 15:01:46 -0800 > > To: Ben Hughes <[email protected]<mailto:[email protected]>> > > Cc: marc abel <[email protected]<mailto:[email protected]>>, " > > [email protected]<mailto:[email protected]>" < > > [email protected]<mailto:[email protected]>> > > Subject: Re: [OSL | CCIE_RS] Intervlan multicast across switces > > > > Right, but even with sparse-mode multicast? This isn't standard > multicast, > > but maybe I'm making it a larger issue than it is. > > > > Regards, > > Jay McMickle- CCNP,CCSP,CCDP > > Sent from iJay > > > > On Mar 1, 2012, at 2:58 PM, Ben Hughes <[email protected]<mailto: > > [email protected]>> wrote: > > > > Hi Jay, > > Yes, it will work fine without multicast-routing turned on. Otherwise > > we'd have to turn on multicast-routing when ever we run an IGP or HSRP > etc. > > cheers, > > Ben. > > From: Jay McMickle <[email protected]<mailto:[email protected] > > ><mailto:[email protected]>> > > Reply-To: Jay McMickle <[email protected]<mailto: > > [email protected]><mailto:[email protected]>> > > Date: Thu, 1 Mar 2012 14:53:23 -0800 > > To: Ben Hughes <[email protected]<mailto:[email protected]><mailto: > > [email protected]>>, marc abel <[email protected]<mailto: > > [email protected]><mailto:[email protected]>>, " > > [email protected]<mailto:[email protected]><mailto: > > [email protected]>" <[email protected]<mailto: > > [email protected]><mailto:[email protected]>> > > Subject: Re: [OSL | CCIE_RS] Intervlan multicast across switces > > I think the question is in regards to capabilities. > > Does multicast propogate across trunks without multi-cast routing > > distributed enabled? I don't know the answer, so I am also interested in > > the answer. > > Marc- is that the question? > > Regards, > > Jay McMickle- CCNP, CCSP, CCDP, MCSE > > http://mycciepursuit.wordpress.com/ > > Support me in the MS150 Challenge! > > > > > http://main.nationalmssociety.org/site/TR/Bike/TXHBikeEvents?px=5886043&pg=personal&fr_id=17896 > > From: Ben Hughes <[email protected]<mailto:[email protected]><mailto: > > [email protected]>> > > To: marc abel <[email protected]<mailto:[email protected]><mailto: > > [email protected]>>; "[email protected]<mailto: > > [email protected]><mailto:[email protected]>" < > > [email protected]<mailto:[email protected]><mailto: > > [email protected]>> > > Sent: Thursday, March 1, 2012 4:07 PM > > Subject: Re: [OSL | CCIE_RS] Intervlan multicast across switces > > Hey Marc, > > Storm Control or VACL? I've also had a similar issue at a customer site > > before that turned out to be a faulty SFP on the link between switches. > > The faulty SFP would allow unicast and broadcast packets across but drop > > multicast. > > cheers, > > Ben. > > From: marc abel <[email protected]<mailto:[email protected]><mailto: > > [email protected]><mailto:[email protected]<mailto:[email protected] > >>> > > Date: Thu, 1 Mar 2012 10:58:20 -0600 > > To: <[email protected]<mailto:[email protected] > > ><mailto:[email protected]><mailto:[email protected] > > <mailto:[email protected]>>> > > Subject: [OSL | CCIE_RS] Intervlan multicast across switces > > If IP multicast routing is not enabled, multicast should > > still propagate within the VLAN correct? Is there anything that would > > prevent this multicast from flowing across a trunk? I have a situation > > where servers in the same VLAN, but plugged into different switches are > not > > able to communicate by multicast. Can anyone explain why this might be? > > Thank you, > > Marc > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > > _______________________________________________ > > For more information regarding industry leading CCIE Lab training, please > > visit www.ipexpert.com > > > > Are you a CCNP or CCIE and looking for a job? Check out > > www.PlatinumPlacement.com > > > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com > > http://onlinestudylist.com/mailman/listinfo/ccie_rs > _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com http://onlinestudylist.com/mailman/listinfo/ccie_rs
