#Sonicwall mac address prefix free
#Sonicwall mac address prefix mac

To verify that connectivity has been restored between R1 and SW1, ping SW1вЂ™s Vlan1 interface from R1 %LINK-3-UPDOWN: Interface FastEthernet0/1, changed state to up SW1(config-if)# switchport port-security mac-address SW1(config-if)# do clear port-security all interface fa0/1 %LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed %LINK-5-CHANGED: Interface FastEthernet0/1, changed state

#Sonicwall mac address prefix mac

Afterward configure the new static MAC address using the switchport port-security mac command. To resolve communication issue between R1 and SW1 due to the port-security violation after the MAC address on R1 has changed youвЂ™ll need to shutdown Fa0/1 and clear the secure mac-address table on that interface using the clear port-security all interface Fa0/1 command in privileged mode or configuration mode with the do command prefix. Keep in mind as soon as you change the MAC address on R1вЂ™s Fa0/0 interface, R1 will no longer be able to communicate to any resources on the network as the MAC address is not in the secure mac-address table on SW1 Fa0/1, thus any received frames will be dropped. вЂ“ Change the MAC address on R1вЂ™s Fa0/0 to then configure the same MAC address as a static MAC in port-security on SW1вЂ™s Fa0/1 interface. Switchport port-security mac-address sticky 80 vlan access Switchport port-security violation restrict Vlan Mac Address Type Ports Remaining Age SW1# show port-security interface fa0/1 address

To verify your configuration you can use the following commands shown below %SYS-5-CONFIG_I: Configured from console by console SW1(config-if)# switchport port-security violation protect SW1(config-if)# switchport port-security mac sticky

To configure the interface to sticky the MAC address dynamically learn use the switchport port-security mac sticky command in interface configuration mode as discussed at the beginning of this lab.Д®nter configuration commands, one per line. To enable port-security youвЂ™ll execute the switchport port-security command as previously learned in Lab 4-19. Upon a port security violation, protect the port. вЂ“ Enable port-security on SW1вЂ™s Fa0/1 interface and configure the interface to sticky the MAC address learned. However, this lab can be completed using the Stub Lab.

#Sonicwall mac address prefix free

This command is executed in privileged mode to erase the current secure mac-address table for a specified switch port.Дue to the limited feature support of the NM-16ESW, this lab CANNOT be completed using the Free CCNA Workbook GNS3 topology. This command is executed in interface configuration mode and configures the port to dynamically learn the MAC address and automatically configure the MAC address as a static MAC address associated with the port.Д¬lear port-security all interface interfacename#/# Switchport port-security mac-address sticky This command is executed in interface configuration mode and statically sets a MAC address that allows traffic with the source MAC to traverse the switch.

Switchport port-security mac-address h.h.h In this lab you will familiarize yourself with the following new commands Command When port-security is configured this way, the first MAC address learned on the switch port will be automatically statically configured into the running-configuration as if you manually specified the MAC address. The next way which is more convenient is to configure a вЂњ StickyвЂќ MAC address and leave the max MAC addresses to its default value of one. The first way being that you configure a static MAC address when configuring port-security on a specific interface. There are two ways to configure a sticky port. In this case you can sticky the port that the wan router is connected to preventing unauthorized device swaps like such. For example you have a small site location with a 1841 router and a 3560-8pc switch and an end user gets the bright idea to swap the 1841 with a WRT54G because he wants wireless and wired network connectivity.

If you completed the previous lab Configuring Dynamic Switchport Security than youвЂ™ll be pretty much up to speed in this lab.Дynamic port security is great but what about when you connect switches to routers or other devices that need to be secured in a way to prevent unauthorized device swapping in the network.