Auto lo iface lo inet loopback auto eth0 iface eth0 inet static address 192.168.20.20 netmask 255.255.255.0 network 192.168.20.0 broadcast 192.168.20.255 gateway 192.168.20.250 The first two lines are standard and may already look similar on your box. Out of a maximum allocated number of MAC addresses on a port, you can manually configure all, allow all to be autoconfigured, or configure some manually and allow the rest to be autoconfigured. Once you manually configure or autoconfigure the addresses, they are stored in nonvolatile RAM (NVRAM) and are maintained after a reset. Click TCP/IP and select Manually from the Configure IPv4 drop-down. Enter the IP Address, Subnet Mask, and Router IP address in the fields provided. Note: If your router supports IPv6 then you would enter the IPv6 configuration for your Mac in the section provided. Manually Configure Ethernet IP Adress.
To fence off MAC address spoofing attacks and improve port security, you can manually add static MAC address table entries to bind ports with MAC addresses.
You can also configure blackhole MAC address entries to filter out packets with certain source or destination MAC addresses.
Follow these steps to add, modify, or remove entries in the MAC address table in system view:
To do… Editing softwares for mac free. Verdict: DxO OpticsPro is the best photo editing software Mac if you are looking for a program that is simple to use. Because of its UI, some users compare it to Lightroom but this software is also quite similar to Adobe Premiere. A family of DxO. | Use the command… | Remarks | |
|---|---|---|---|
Enter system view | system-view | — | |
Configure MAC address table entries | Configure static or dynamic MAC Address Table Entries | mac-address { dynamic | static } mac-addressinterfaceinterface-type interface-numbervlanvlan-id | Required Use either command. Make sure that you have created the VLAN and assign the interface to the VLAN. |
Configure blackhole MAC Address Table Entries | mac-address blackholemac-addressvlanvlan-id | ||
Follow these steps to add or modify a MAC address table entry in interface view:
To do… | Use the command… | Remarks |
|---|---|---|
Enter system view | system-view | — |
Enter interface view | interface interface-type interface-number | — |
Configure a MAC address table entry | mac-address { dynamic | static } mac-addressvlanvlan-id | Required Ensure that you have created the VLAN and assign the interface to the VLAN |
Although Cisco switches dynamically build the MAC address table by using the source MAC address of the received frames, you can also manually add a MAC address to the switch’s MAC address table. The static MAC entries will be retained even after the switch is restarted.
To configure a static MAC address, the following command is used:
Configure Static Mac Address Cisco
The following command will permanently assign the MAC address of 1111.1111.1111 to the interface Fa0/2, VLAN 1:
To verify the configuration, we can use the show mac address table command:
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To delete the static entry from the MAC address table, re-enter the command with the no keyword in front.