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3com 5500-ei pwr Installation Instruction

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z 
If more than one client are connected to a port, you cannot configure a Guest VLAN for this port.  
z 
When a Guest VLAN is configured for a port, only one MAC address authentication user can 
access the port. Even if you set the limit on the number of MAC address authentication users to 
more than one, the configuration does not take effect. 
z 
The undo vlan command cannot be used to remove the VLAN configured as a Guest VLAN. If you 
want to remove this VLAN, you must remove the Guest VLAN configuration for it. Refer to the 
VLAN module in this manual for the description on the undo vlan command.  
z 
Only one Guest VLAN can be configured for a port, and the VLAN configured as the Guest VLAN 
must be an existing VLAN. Otherwise, the Guest VLAN configuration does not take effect. If you 
want to change the Guest VLAN for a port, you must remove the current Guest VLAN and then 
configure a new Guest VLAN for this port.  
z 
802.1x authentication cannot be enabled for a port configured with a Guest VLAN.  
z 
The Guest VLAN function for MAC address authentication does not take effect when port security 
is enabled.  
 
Configuring the Maximum Number of MAC Address Authentication Users Allowed to 
Access a Port 
You can configure the maximum number of MAC address authentication users for a port in order to 
control the maximum number of users accessing a port. After the number of access users has 
exceeded the configured maximum number, the switch will not trigger MAC address authentication for 
subsequent access users, and thus these subsequent access users cannot access the network 
normally.  
Follow these steps to configure the maximum number of MAC address authentication users allowed to 
access a port: 
To do... 
Use the command... 
Remarks 
Enter system view 
system-view 
— 
Enter Ethernet port view 
interface interface-type 
interface-number 
— 
Configure the maximum 
number of MAC address 
authentication users allowed to 
access a port 
mac-authentication 
max-auth-num 
user-number 
Required 
By default, the maximum number 
of MAC address authentication 
users allowed to access a port is 
256.