Hello everyone! I need help.
Switch: WS-C2960X-48LPS-L, IOS: Version 15.2(4r)E3
Activated on the port:switchport block unicast/multicast, switchport port-security, storm-control broadcast/unicast/multicast, spanning-tree portfast edge, spanning-tree bpduguard enable and dhcp snooping limit rate.
PC is connected to this the port, on the switch port status is ip and protocol is up, but MAC Address not found in mac address table (show mac add). What could be the problem? Thank you in advance for your help.
Faced one more problem on one of switches. The conditions are the same, only the MAC address of the PC appeared on the root (distribution) switch in the ARP table, but did not appear in the MAC addresses table.
I waited until the end of the CAM's life, but the address did not appear.
Solved! Go to Solution.
The problem on this switch has been resolved.
However, just now, another one has happened. All functions specified in the first post were activated on the port. When changing the PC to a new one on the access switch, the MAC does not appear on the port, but appears on the kernel switch. As a result, the new connected PC did not have access to the network, after disabling the functions DAI, DHCP Snooping and IP Source Guard, the MAC address appeared and everything started to work.