Arp Inspection Vlan Configure - ZyXEL Communications MES3500-24S User Manual

Figure 151 Advanced Application > IP Source Guard > ARP Inspection Port Configure
The following table describes the labels in this screen.
Table 116 Advanced Application > IP Source Guard > ARP Inspection Port Configure
LABEL
Port
Trusted State
Limit
Rate (pps)
Burst interval
(seconds)
Apply
Cancel

27.6.5 ARP Inspection VLAN Configure

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.
Chapter 27 IP Source Guard
DESCRIPTION
This field displays the port number. If you configure the * port, the settings are applied to all of the
ports.
Select whether this port is a trusted port (Trusted) or an untrusted port (Untrusted).
The Switch does not discard ARP packets on trusted ports for any reason.
The Switch discards ARP packets on untrusted ports in the following situations:
• The sender's information in the ARP packet does not match any of the current bindings.
• The rate at which ARP packets arrive is too high. You can specify the maximum rate at which
ARP packets can arrive on untrusted ports.
Rate and Burst Interval settings have no effect on trusted ports.
Specify the maximum rate (1-2048 packets per second) at which the Switch receives ARP packets
from each port. The Switch discards any additional ARP packets. Enter 0 to disable this limit.
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.
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.
Click this to reset the values in this screen to their last-saved values.
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