Yes, that's correct, both servers are on the same VLAN. So theoretically, no layer 3 should be involved.
Joann --- "Arie Vayner (avayner)" <[EMAIL PROTECTED]> wrote: > Joann, > > Just to be sure I get you right, both servers are on > the same VLAN > behind the FWSM, and the FWSM is not really part of > the multicast stream > (it does not have to pass through it). Is that > right? > > If this is the case, then the FWSM should not affect > the multicast > stream as both servers are on the same VLAN, and > multicast is handled by > the L2 mechanism on the 6500. > > When you try to "ping <mcast grp>" - I am not fully > sure how would this > be sent by the host... I would recommend putting a > sniffer on both hosts > and making sure the traffic is sent and received > correctly. > > Take a look at IGMP snooping: > http://www.cisco.com/univercd/cc/td/doc/product/lan/cat6000/122sx/swcg/s > nooigmp.htm > > It could be that you would have to disable it on > these ports (depends on > how the applications behave). > > Arie Vayner > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf > Of Joann Deng > Sent: Saturday, September 01, 2007 00:22 AM > To: [email protected] > Subject: [c-nsp] FWSM blocking multicast traffic > between two hosts in > sameVlan? > > Hi, > > We have hosts in the same Vlan, which connects to > FWSM (routed mode). > These two hosts run WebLogic, which uses multicast > address 237.155.155.2 > to communicate. > But somehow, when run "ping 237.155.155.2" on one > host, cannot see > response back from the other. > So, is it possible that FWSM is doing something > fancy, like blocking > multicast traffic, and we need to add some configs? > Any input is highly appreciated. > > Thanks, > > Joann > > > > ________________________________________________________________________ > ____________ > Take the Internet to Go: Yahoo!Go puts the Internet > in your pocket: > mail, news, photos & more. > http://mobile.yahoo.com/go?refer=1GNXIC > _______________________________________________ > cisco-nsp mailing list [email protected] > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at > http://puck.nether.net/pipermail/cisco-nsp/ > ____________________________________________________________________________________ Got a little couch potato? Check out fun summer activities for kids. http://search.yahoo.com/search?fr=oni_on_mail&p=summer+activities+for+kids&cs=bz _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
