Hello all, I am studying multicast technologies for acedemic reasons and also so that I can hopefully resolve a real-world issue. I have been reading about CGMP in various Cisco Press books, CCO - all the usual suspects. Seems that all of the examples show a switch directly connected to a router. Is it just a foregone conclusion that a Catalyst switch with an on-board route processor will be the architecture? Because I was thinking of the typical switch block. You have your distribution layer switch (hopefully L3 capable) and also a bunch of downstream access layer switches. If a switch were stacked below an upstream access layer switch instead of being directly connected to distribution, I guess CGMP would break? A host on the lowest switch in the stack might send an ICMP join. When the router sends the CGMP message to the all-switch multicast, the higher layer access switch wouldn't have the MAC address of that host stored. So it wouldn't forward the multicast frame on any of its ports? Or is it sent along all trunk ports by default?
I sense that I have lost sight of the big picture. Many thanks, Scott Message Posted at: http://www.groupstudy.com/form/read.php?f=7&i=34704&t=34704 -------------------------------------------------- FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]
