If you want to see the port disabled you could use vmware Fusion and fire up a vm in bridge mode. The vm will use its MAC and then the will see two. Or connect a cheap switch to the port and connect both MacBooks. That would work also. I use Aastra phones and AsteriskNow in my lab. Learning port security is a great skill. Most people don't use it because they don't understand all the intricacies but it is a great first layer of security. I didn't buy mine from there, but with my version I wasn't able to implement ssh due to the wrong bin ios. Sorry, you wanted a router. Find A Community.
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Did you mean:. All community This category This board. Labels: Other Switching. Question Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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- Solved: Change Stack Member MAC Address (X) - Cisco Community!
To return the interface to the default condition as not a secure port, use the no switchport port-security interface configuration command. To return the interface to the default number of secure MAC addresses, use the no switchport port-security maximum value. The difference between each port security mode according to Cisco: protect —Drops packets with unknown source addresses until you remove a sufficient number of secure MAC addresses to drop below the maximum value.
To disable sticky learning on an interface, use the no switchport port-security mac-address sticky command. The interface converts the sticky secure MAC addresses to dynamic secure addresses. To delete all the sticky addresses on an interface or a VLAN, use the no switchport port-security sticky interface interface-id command.
The address keyword enables you to clear a secure MAC addresses. Optional Specifies the EtherChannel interface. The EtherChannel number is from 1 to Optional Displays information about the multicast MAC address table entries only. Optional Displays information about the static MAC address table entries only. The switch maintains static MAC address entries that are saved in its startup configuration across reboots and flushes the dynamic entries. Adds web authentication to the order of authentication methods. The default priority is Ordering sets the order of methods that the switch attempts when trying to authenticate a new device is connected to a port.
When configuring multiple fallback methods on a port, set web authentication webauth last. Assigning priorities to different authentication methods allows a higher-priority method to interrupt an in-progress authentication method with a lower priority. If a client is already authenticated, it might be reauthenticated if an interruption from a higher-priority method occurs.
The default priority of an authentication method is equivalent to its position in execution-list order: Use the dot1x , mab , and webauth keywords to change this default order. This example shows how to set This example shows how to set MAB as the first authentication method and web authentication as the second authentication method:. Configures the port mode as unidirectional or bidirectional.
Specifies how the Auth Manager handles authentication failures as a result of unrecognized user credentials. Specifies how the Auth Manager handles authentication failures as a result of a nonresponsive host.
Reinitializes an authorized Auth Manager session when a previously unreachable authentication, authorization, and accounting server becomes available. Authorizes Auth Manager sessions when the authentication, authorization, and accounting server becomes unreachable. Specifies the order in which the Auth Manager attempts to authenticate a client on a port.
Configures the time after which an inactive Auth Manager session is terminated.
Cisco Stacking 2960-X Catalyst Switches
Specifies the period of time between which the Auth Manager attempts to reauthenticate authorized ports. Specifies the period of time after which the Auth Manager attempts to authenticate an unauthorized port. Specifies the action to be taken when a security violation occurs on a port. Displays information about the authentication methods that are registered with the Auth Manager.
Displays information about current Auth Manager sessions. Displays information about the Auth Manager for a given interface. To configure the violation modes that occur when a new device connects to a port or when a new device connects to a port after the maximum number of devices are connected to that port, use the authentication violation command in interface configuration mode.
Error-disables the port or the virtual port on which an unexpected MAC address occurs. Use the authentication violation command to specify the action to be taken when a security violation occurs on a port. This example shows how to configure an IEEE This example shows how to configure an You can verify your settings by entering the show authentication privileged EXEC command. To enable Client Information Signaling Protocol CISP on a switch so that it acts as an authenticator to a supplicant switch, use the cisp enable global configuration command. The link between the authenticator and supplicant switch is a trunk.
Both switches have different configuration revision numbers. You can reenable a port by using the shutdown and no shutdown interface configuration commands, or you can clear error-disable for VLANs by using the clear errdisable interface command. Enables error-disabled detection for a specific cause or all causes. Displays interface status of a list of interfaces in error-disabled state. To delete from the MAC address table a specific dynamic address, all dynamic addresses on a particular interface, all dynamic addresses on stack members, or all dynamic addresses on a particular VLAN, use the clear mac address-table command in privileged EXEC mode.
This command also clears the MAC address notification global counters. Optional Deletes all dynamic MAC addresses on the specified physical port or port channel. The range is 1 to Clears the notifications in the history table and reset the counters. You can verify that the information was deleted by entering the show mac address-table privileged EXEC command.
X MAC table not updating - Cisco Community
This example shows how to remove a specific MAC address from the dynamic address table:. Displays the MAC address table static and dynamic entries. Displays the MAC address-table move update information on the switch. Displays the MAC address notification settings for all interfaces or on the specified interface when the interface keyword is appended. To prevent non-IP traffic from being forwarded if the conditions are matched, use the deny MAC access-list configuration command on the switch stack or on a standalone switch.
To remove a deny condition from the named MAC access list, use the no form of this command. Defines a host MAC address and optional subnet mask. If the source address for a packet matches the defined address, non-IP traffic from that address is denied. Defines a destination MAC address and optional subnet mask.
If the destination address for a packet matches the defined address, non-IP traffic to that address is denied. Optional Specifies a class of service CoS number from 0 to 7 to set priority. Filtering on CoS can be performed only in hardware. A warning message reminds the user if the cos option is configured. This command has no defaults. You enter MAC-access list configuration mode by using the mac access-list extended global configuration command. If you use the host keyword, you cannot enter an address mask; if you do not use the host keyword, you must enter an address mask.
When an access control entry ACE is added to an access control list, an implied deny-any-any condition exists at the end of the list. That is, if there are no matches, the packets are denied. However, before the first ACE is added, the list permits all packets. To filter IPX traffic, you use the type mask or lsap lsap mask keywords, depending on the type of IPX encapsulation being used. Traffic matching this list is denied.
This example shows how to remove the deny condition from the named MAC extended access list:.