2940 problem setting interface mac-address

[ccrespoh]

Hello,

I'm trying to set interface mac address on the Fastethernet interfaces. The switch is an WS-C2924-XL-EN. When I put the mac-address {mac address} command I get an ""mac-address" override is not allowed in this system"

In others switches (the same model) I've been succesful in that issue.

Which can be the problem?

Thanks in advance

[Prashanth Krishnappa]

You must be running very old IOS on the switches in which you can configure it. XLs do not support this and it was changed through the following bug

http://www.cisco.com/cgi-bin/bugtool/onebug.pl?bugid=CSCdp24997

[ccrespoh]

I mean, I'm trying to fix the FastEthernet port mac-address.

Well, I've got a lot of this machines. I've done the same in a machine with the IOS C2900XL-H2S-M ver 12.0(5.1)XP.

The version which doesn't work is the IOS C2900XL-C3H2S-M ver 12.0(5.2)XU.

As you can see, the version doesn't work is newer. Moreover, the command exists in both IOS, so it should works, shouldn't it?

Thanks in advance.