ZyXEL Communications Plumbing Product metrogigabit switch User Manual

Chapter 26 IP Source Guard

MGS3700-12C User’s Guide

Use this screen to enable ARP inspection on each VLAN and to specify when the 
Switch generates log messages for receiving ARP packets from each VLAN. To 
open this screen, click Advanced Application > IP Source Guard > ARP 
Inspection > Configure > VLAN.

Figure 141   ARP Inspection VLAN Configure

The following table describes the labels in this screen.

Burst interval 

(seconds)

The burst interval is the length of time over which the rate of ARP 
packets is monitored for each port. For example, if the Rate is 15 
pps and the burst interval is 1 second, then the Switch accepts a 
maximum of 15 ARP packets in every one-second interval. If the 
burst interval is 5 seconds, then the Switch accepts a maximum 
of 75 ARP packets in every five-second interval.

Enter the length (1-15 seconds) of the burst interval.

Apply

Click Apply 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 this to reset the values in this screen to their last-saved 
values.

Table 91   ARP Inspection Port Configure (continued)

Table 92   ARP Inspection VLAN Configure

VLAN

Use this section to specify the VLANs you want to manage in the 
section below.

Start VID

Enter the lowest VLAN ID you want to manage in the section 
below.

End VID

Enter the highest VLAN ID you want to manage in the section 
below.