#Cisco mac address of vlan mac#
If VLAN interface's MAC cannot be changed, it is best to have the config option removed to avoid any false hope. A more flexible device would go a long way.
#Cisco mac address of vlan software#
Sometime it might be the simplest way to get things done. After a networking device receives a packet, the Cisco IOS software checks the source MAC address of the Gigabit Ethernet, 802.1Q VLAN, or 802.1Q-in-Q. This mainly because he did not have to spend days to workaround a bug or undocumented feature. So, the last part of our base MAC address. The core switch is the one used to do the routing and I know that VLAN 17 doesn't have an SVI on the core switch. The 65th MAC address is assigned to the first layer 3 interface and this is where things get interesting. When I do 'show mac-address-table vid 17' (these are Avaya switches) I see loads of MAC addresses on the VLAN but 'ahow arp' and 'show arp-table' show me no ip addresses. In the MAC-Based Group Table, check the box next to the MAC-Based VLAN group you would like to delete. On the 3750 the first 64 MAC addresses beginning at the base MAC are reserved for layer 2 switchports. You should now have added a MAC-Based VLAN group on your switch. It maybe hard for someone to agree it makes sense to change the VLAN i/f MAC. The base MAC (from show version) is as follows: Base ethernet MAC Address : 08:17:35:E6:46:80. with this command, you can change it to what. The 2 interfaces has the same MAC and will have trouble switching packet. If you do a sh vlan you see a mac address associated with this VLAN. But someone need to modify the VLAN interface, there is usually done to workaround some other issues or some creative ways of using network interfaces that could benefit from having the ability to control VLAN interface MAC.įor example, maybe someone need physically loop back 2 switch ports in order to impose a specific feature order.
![cisco mac address of vlan cisco mac address of vlan](https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/6016-discussions-lan-switching-routing/419860/3/network_35.jpg)
Normally, there is no need to change the MAC for a VLAN interface because VLANs are basically separated LAN and their MAC address will not matter. Viewing the port and VLAN MAC addresses If the switch is at the CLI Operator level, use the enable command to enter the Manager level of the CLI.
![cisco mac address of vlan cisco mac address of vlan](https://community.cisco.com/kxiwq67737/attachments/kxiwq67737/6016-discussions-lan-switching-routing/419860/2/port_to_vlan.jpg)
The mac address or CAM table shows the Vlan associated with the port, MAC being.
![cisco mac address of vlan cisco mac address of vlan](https://content.spiceworksstatic.com/service.community/p/post_images/0000318524/5b54a69b/attached_image/6qeiqlqaaib11.png)
This is a very old topic but it came up top in google search. With the command, you can figure out which MAC address is on which port.