We've got two 4500-X as VSS configured and 3750-X as Access Switches. We want to use IPTV Multicast in this Network. The Core is configured as PIM Multicast Router in Sparse-Dense Mode and the Access Switches are snooping for IGMP Pakets. After connecting a Client asking for Multicast Stream (220.127.116.11) the Mac Address Table on the Access Switch is empty:
#show mac address-table multicast
Vlan Mac Address Type Ports
---- ----------- ---- -----
But it recognizes the Group the Client is asking for:
Only the IGMP Querier / PIM Router is showing entries in the "show mac address-table multicast" table. The access switches only care about IGMP snooping groups which can be seen with "show ip igmp snooping groups".
On a somewhat related note.... do you know if the end-device automatically populates the destination mac-address for a multicast frame? I am aware there is always a correlating mac-address for every IP multicast address. But wasn't sure if there was still something similar to "ARP". Or if the end-device talking multicast just auto populates the destination mac.
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...