A question about the port security setting
Recently, I met a problem about the setting of port security.
I used XGS4600-32 as the core switch, which connects to the Internet.
Then I used GS2210-24 to connect to the XGS4600-32.
To control the PC numbers to access the Internet, I enable the port security on the port connected to GS2210 and set the "limited number of learned MAC address" as 20 on XGS4600. (Because I plan to let only 20 colleagues from the department to access the Internet.)
The problem I met is that there is always 1 colleague tell me that he/she cannot access the internet.
I have no choice but to add the "limited number of learned MAC address" as 21 and the situation doesn't happen anymore.
I'm just curious why I have to set one more MAC number?
Does anyone know why?
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