ZyXEL MES3500-24F User Guide - Page 231
Advanced Application > IP Source Guard > ARP Inspection >, Con gt; Port
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Chapter 26 IP Source Guard open this screen, click Advanced Application > IP Source Guard > ARP Inspection > Configure > Port. Figure 122 ARP Inspection Port Configure The following table describes the labels in this screen. Table 85 ARP Inspection Port Configure LABEL Port Trusted State 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: Limit Rate (pps) Burst interval (seconds) • 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 fivesecond interval. Apply Cancel 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. MES3500-24/24F User's Guide 231