![]() So when active fails, the MAC shifts to the passive half of the “teamed” interface, and appears on the other switch. ![]() The other half of the problem? (Have you figured it out?)Ī few of the servers were set up for active – passive failure form of teaming. Although if you think about it, that is actually an even more effective form of what we thought we intended. ![]() Which the Cisco reference guide doesn’t really say. The other half is that the learned MAC addresses cannot be used on any other port. So if you’re thinking that port security just controls the number and which MAC addresses can be used on a port, well, that’s half of it. When a MAC address has been learned on one port, you cannot then use that MAC on another port. In most if not all cases, they were dual-homed to Cisco switches in a VSS pair. Switchport port-security mac-address stickyĪ couple of servers subsequently had problems.
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