Like IP address 10.x.x.x;172.16-31,192.x.x.x,Anyone know what "illegal" or reserved MAC address which can not use ? (e.g 0180c2 000001 (1 to f) Does have any ieee spec. mention it?
Thanks, sy
Like IP address 10.x.x.x;172.16-31,192.x.x.x,Anyone know what "illegal" or reserved MAC address which can not use ? (e.g 0180c2 000001 (1 to f) Does have any ieee spec. mention it?
Thanks, sy
What do you mean by "can not use"? IP addresses like 10.x.x.x are not illegal in any useful sense. They are intended to be used - locally.
Have a look at
best regards Patrick
I see that that reference is confusing. It suggests that the U/L bit were only "valid" for some Token Ring addressing format.
Here's another one,
So, question for the group: is use of the U/L bit (set to L) legal in all ordinary Ethernets? Is there a canonical GOOD reference that gives license for such usage? Or, is it just "happens to work"?
best regards Patrick
Setting the "U/L" bit to "L (local)" is valid, per IEEE 802.3 (about as good a "canon" as you are likely to get). All this means is that, for the devices so set, responsibility for unique address assignment falls on the network administrator, rather than on the manufacturer of the device.
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