The message is just a warning stating that a packet was received by the Catalyst 4000 Switch with a source multicast MAC address. No packet is getting dropped in the switch due to this issue. Source multicast MAC addresses in a packet are not allowed per spec and hence the warning message. The hardware used on Catalyst 4000 provides the warning message not the actually NMP software.
Furthermore, the switch will just flood the frame and not learn the source multicast MAC address. The Catalyst 4000 Family is the only product family to display the message. All Catalyst products will flood these types of frames and not learn the SA. That is why the C6509 is not displaying any message.
Generally, the problem is caused by a software application, bad NIC, or other improperly configured network server, workstation, or applicance. I would investigate the devices connected to port x/y and to try to locate the source of the frame.
I have tried searching for the device but it does not seem to exist as all i have to go by is multicast source address 45:00:03:bc:9e:34 on port 2/2. None of the mac addresses on our switch begin with a 45:.
Please how else do I go about looking for this device?
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 customers befor...
Introduction Featured Speakers Luis Espejel is the Telecommunications
Manager of IENova, an Oil & Gas company. Currently he works with Cisco
IOS® and Cisco IOS XE platforms, and NX to some extent. He has also
worked as a Senior Engineer with the Routing P...
In this session you can learn more about Layer 3 multicast and the best
practices to identify possible threats and take security measures. It
provides an overview of basic multicast, the best security practices for
use of this technology, and recommendati...