On a Windows Server 2008 or Windows Server 2008 R2 Hyper-V host, an Event ID 12565 from source "Microsoft-Windows-Hyper-V-Worker" is logged, as described in the Event ID 12565 - NIC Configuration. Synthetic Ethernet Port (Instance ID CCE417C5-BDD9-4216-85CA-248620EE75C6): Failed to power on with Error 'Attempt to access invalid address'. The application encountered an error while attempting to change the state of ''
When you start a guest virtual machine, you may encounter the following error message: The Hyper-V server is configured to provide Dynamic MAC addresses to the guest machines. You have a Windows Server 2012 computer that is configured with the Hyper-V role. The port-security protect mode silently drops packets with unknown source addresses until you remove a sufficient number of secure MAC addresses todrop below the maximum value.This article provides a solution to an issue that occurs when you start a guest virtual machine.Īpplies to: Windows Server 2012 R2 Original KB number: 2804678 Symptoms
Interface FastEthernet 0/3 configuration - Protect mode The port-security shutdown mode puts the interface into the error-disabled state immediately and sends an SNMP trap notification. Interface FastEthernet 0/2 configuration - Shutdown mode (default) Secure Port MaxSecureAddr CurrentAddr SecurityViolation Security Action The interface drops traffic with the new mac-address (not learned by the switch because 3 mac addresses have already been registered on the fa0/1 interface) and increases the security viloation counter based on the 'restrict' port-security configuration of the interface. When the rogue laptop is connected to the hub and tries to communicate with 192.168.1.4, the number of mac-addresses learned ont the fastethernet 0/1 interface exceeds 3. Switchport port-security violation restrict Switchport port-security mac-address sticky Port security with sticky MAC addresses retains dynamically learned MAC addresses during a link-down condition. Port security with sticky MAC addresses provides many of the same benefits as port security with static MAC addresses, but sticky MAC addresses can be learned dynamically. The port-security restrict mode drops packets with unknown source addresses until you remove a sufficient number of secure MAC addresses to drop below the maximum value and causes the SecurityViolation counter to increment. Solution Interface FastEthernet 0/1 configuration - Restrict mode Static mac address entry : 00E0.A3CE.3236 Configure port security on interface Fa 0/3 of the switch with the following settings : Configure port security on interface Fa 0/2 of the switch with the following settings :ģ. Configure port security on interface Fa 0/1 of the switch with the following settings :Ģ. This lab will test your ability to configure port security on Cisco TM 2960 switch interfaces.ġ.
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