ZyXEL Communications Plumbing Product metrogigabit switch User Manual

Chapter 19 Port Security

MGS3700-12C User’s Guide

Use this screen to set the MAC address learning limit on per-port and per-VLAN 
basis. Click VLAN MAC Address Limit in the Advanced Application > Port 
Security screen to display the screen as shown. 

Figure 99   Advanced Application > Port Security > VLAN MAC Address Limit 

The following table describes the labels in this screen. 

Table 51   Advanced Application > Port Security > VLAN MAC Address Limit 

Active

Select this option to activate this rule. 

Port

Enter the number of the port to which this rule is applied.

VID

Enter the VLAN identification number.

Limit Number Use this field to limit the number of (dynamic) MAC addresses that may 

be learned on a port in a specified VLAN. For example, if you set this field 
to "5" on port 2, then only the devices with these five learned MAC 
addresses may access port 2 at any one time. A sixth device would have 
to wait until one of the five learned MAC addresses aged out. MAC 
address aging out time can be set in the Switch Setup screen. The valid 
range is from “0” to “16384”. “0” means this feature is disabled.

Alarm 
Threshold

Alarm threshold of learned MAC address by VLAN

Add

Click Add to save your changes to the Switch’s run-time memory. The 
Switch loses these changes if it is turned off or loses power, so use the 
Save link on the top navigation panel to save your changes to the non-
volatile memory when you are done configuring.

Cancel Click 

Cancel to reset the fields to your previous configuration.

Clear

Click Clear to clear the fields to the factory defaults.

Index

This field displays the index number of the rule. Click an index number to 
change the settings.