I have strange problem with ports of my Cisco 4507R-E switch. Sometimes is happened when I look in my CUCM 6.1 to see that one or more phones are not registered. I telnet to 4507R switch to see status of port where IP Phone is connected show ip interface brief and the port is UP. Next thing I write following command show mac address-table interface gigabit 1/18 and there no mac address in output. The configuration of the ports is:
When a packet gets routed, it carries the source MAC address as that of the physical interface or VLAN interface, which performs the routing rather than the outgoing interface which is in switchport mode.
In order to learn the MAC address of the directly connected interface or port, you can configure the port for native VLAN. When any untagged frames are sent out of this port, the source MAC address associated physical port is learned and added to the MAC address table in the remote 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...