Find the MAC address on Cisco router, IP phone & computer

How to find MAC address of computer on windows 7,8 XP

How to know the address MAC (Media Access Control) of your computer? This information is required for certain operations such as taking remote control.

MAC stands for: “Media Access Control”. This is the address of a network card and it is specific to each network device and it is encoded in hexadecimal. It is located in layer 2 of the OSI model (interconnecting computer networks) or TCP / model IP (Internet), and is fixed during manufacture.

You can find the MAC address of any computer on windows 7 or 8 by using command “ipconfig /all”.

Open command prompt by typing cmd in run and then type ipconfig /all, this will show you the all address of network card that are attached with your PC. You can see your MAC address under the title “physical address”.

Find MAC Address on a Cisco VoIP Phone:

Following are the simple steps for locating the MAC address on a VoIP device.

1.       Open the phone settings or press the Settings button on the VoIP phone.
 

2.       By using buttons and softkeys on the IP phone, select Network Configuration. 

3.       Enter into Network Configuration.
 

There, you will find the MAC Address appears option.

Find MAC address of Cisco router interface:

Each Ethernet interface on a router will have a MAC address (as opposed to some other layer-2 transport interface).  The MAC address used will vary based on the hardware platform and/or configuration. You can find the MAC address by using command “show interfaces <interface-name>”e.g. show interfaces fastEthernet 0/0

Visit for more Basic Cisco commands 

EtherChannel | Lag port or link aggregation configuration on cisco switch in GNS3

how to configure link aggregation on Cisco

Port channel interface:

Using port channel interface group you can perform the same configuration at once, you need to configure all your configuration on your channel group and then it will replicate all your configuration on all the interface that you have added to that channel group.

With port aggregation you can utilize your interface with maximum throughput and speed. Suppose you have two redundant interfaces between your switches, using channel group you can utilize both interfaces at once. If you have two links of 1G each between two switches, you don’t get the 2G bandwidth/speed with channel group but you can used both link as once. In absence of channel group spaining tree protocol block one of link and use only one link/interface at a time. But with port channel if you have two PC with switch as shown in figure, then PC1 may use interface 0/1 and PC2 may use other interface a, in this way you can utilize both of your interfaces. EtherChannel provides automatic recovery for the loss of a link by redistributing the load across the remaining links. If a link fails, EtherChannel redirects traffic from the failed link to the remaining links in the channel without intervention.

 How to configure Port channel group:

Commands:

interface range f1/0 - 1

channel group 1 mode on

 For configuring different setting with port channel you can use following configurations:

interface port-channel 1

switchport speed 4000

no shut

When you created the channel group then it is necessary that you should perform all your configuration through that channel-group if you do some configuration on individual interfaces then it will give you error of ”mismatch configuration”..