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Cisco mac address sticky aging time how to#
Cisco mac address sticky aging time software#

You can manually specify a list of static MAC addresses for a port. Static MAC addresses are not eligible for aging. Dynamically locked MAC addresses are eligible to be learned by another port. The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of. Dynamically locked MAC addresses are aged out if another packet with that address is not seen within the age-out time. Note: If you want to set a specific MAC address for a port, set the dynamic entries to 0, then allow only packets with a MAC address matching the MAC address in the static list.ĭynamically locked addresses can be converted to statically locked addresses. These MAC addresses can still be aged or moved when configured using the commands mac address-table aging-time and default switchport port-security mac address. Only frames with an allowable source MAC addresses are forwarded. After the limit is reached, additional MAC addresses are not learned.

Cisco mac address sticky aging time software#

The maximum number of MAC addresses is platform dependent and is given in the software Release Notes. You can specify the maximum number of MAC addresses that can be learned on a port. Port security implements two traffic filtering methods, dynamic locking and static locking.

Cisco mac address sticky aging time how to#

Learn the basics of port security, and find out how to configure this feature.

You can enable port security on a per port basis. CABASWshow port-security int g 1/0/1 Port Security : Disabled Port Status : Secure-down Violation Mode : Shutdown Aging Time : 0 mins Aging Type : Absolute SecureStatic Address Aging : Disabled Maximum MAC Addresses : 1 Total MAC Addresses : 0 Configured MAC Addresses : 0 Sticky MAC Addresses : 0 Last Source Address:Vlan : 0000.0000. One way to boost network security is to use Ciscos Port Security feature to lock down switch ports.

Packets that have a matching MAC address (secure packets) are forwarded all other packets (unsecure packets) are restricted.

interface fa0/12 switchport port-security aging time 10. You can limit the number of MAC addresses on a given port. Recall that every device on the network has a unique MAC address that it uses to communicate.

The port security feature offers the following benefits: Switchport port-security violation shutdown. Switchport port-security mac-address sticky. Switchport port-security aging type inactivity. Here is my config per port: switchport port-security aging time 120. When a link goes down, all dynamically locked addresses are freed. Posted by I Come From France at Jul 9th, 2014 at 8:52 AM. Port Security helps secure the network by preventing unknown devices from forwarding packets.