At 08:34 AM 6/18/02, Brian Backer wrote: >that was a typo... meant igmp
IGMP isn't relevant either. IGMP doesn't do multicast routing. It's just used by an end host to register with a local router to receive an IP multicast stream. For multicast routing, you would use PIM, MOSPF, DVMRP. Plus, IGMP has to do with IP multicast, whereas we were talking about the more fundamental concept of sending to a MAC multicast destination address. Cisco tries to teach IP multicast without teaching people about basic MAC layer concepts, causing them to think IP multicast is all there is. It's sad. Priscilla > > I don't think it can be multicast. If it were, then it > would possibly > > follow IGRP routes and traverse WAN links... no good. > >Uh, how's that? > > > > > Gotta be Broadcast :) > > B > > > > > > -----Original Message----- > > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]] > > Sent: Monday, June 17, 2002 8:39 PM > > To: [EMAIL PROTECTED] > > Subject: STP BPDUs [7:46839] > > > > This might be a simple answer, but what type of message > is a BPDU: > > Unicast, Multicast or Broadcast. I have searched all > over Cisco's site, > > and > > dug through STP RFC..no luck. I have come up with the > following: > > > > "The Destination Address field indicates the destination > address as > > specified in the Bridge Group Address table. For IEEE > Spanning-Tree > > Protocol > > BPDU frames, the address is 0x800143000000. For IBM > Spanning-Tree > > Protocol > > BPDU frames, the address is 0xC00000000100. For Cisco > Spanning-Tree > > Protocol > > BPDU frames, the address is 0x800778020200." > > > > I guess it also depends on the definition of > multi/broad/unicast. > > > > Thanks for your help. > [EMAIL PROTECTED] ________________________ Priscilla Oppenheimer http://www.priscilla.com Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=46911&t=46839 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
