Switch MAC Address

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Oct 2nd, 2007
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Does a Catalyst 2950 switch have only one MAC address? Is this address associated with a network interface card? Is this MAC address associated with the IP address and default-gateway of the switch? Does the 2950 switch have only one MAC address?


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Martin Parry Tue, 10/02/2007 - 07:44
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Hi


Each of the switchports has it's own mac address. Each switchport can be considered to be the same as a NIC regarding having a burnt in mac address as a unique identifier.


Martin

rayroyaleverest Tue, 10/02/2007 - 08:14
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Does the switch also have an MAC address associated with its management IP address? How are all of these MAC addresses observed?

Martin Parry Tue, 10/02/2007 - 08:30
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The SVI interface will also have a mac address assigned to it.


You can view the mac addresses by issuing the show interfaces command.



rayroyaleverest Tue, 10/02/2007 - 09:18
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How many IP addresses are associated with the 2950 switch? Is each IP address associated with an MAC address?

ankbhasi Tue, 10/02/2007 - 09:26
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Hi Friend,


2950 is a layer 2 switch so you can have only one logical layer 3 interface up and up and you can have only one ip address assigned to this interface for management purpose. Now because only one layer 3 interface which is also known as vlan interface can be configured and be active at a time this interface will be having its own mac address.


2950 switch itself have one base mac address and the layer 2 interface and one layer 3 logical interface will have their own mac addresses.


HTH


Ankur

rayroyaleverest Tue, 10/02/2007 - 10:34
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Can I telnet to this management ip address via an ethernet port address?

ankbhasi Tue, 10/02/2007 - 21:33
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Hi Friend,


You can telnet to the switch using management ip address from anywhere in the network if you have routes to reach that subnet.


I did not understood you last statement "via an ethernet port address".


Regards,


Ankur

ankbhasi Wed, 10/03/2007 - 06:09
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Hi Friend,


If you issue a command "sh version" you will get the base mac address of the switch and if you issue a command "sh interface vlan " you will get the mac address assigned to that layer 3 logical interface.


HTH


Ankur

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