Arp Inspection Vlan Configure - ZyXEL Communications XS3800-28 User Manual

The following table describes the labels in this screen.
Table 136 Advanced Application > IP Source Guard > IPv4 Source Guard Setup > ARP Inspection >
Configure > Port
L ABEL
SLOT
Port
*
Trusted State
Limit
Rate (pps)
Burst interval (seconds)
Apply
Cancel
29.2.2 ARP Inspe c tio n VL AN C o nfig ure
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
>
IP So urc e G ua rd
Chapter 29 ARP Inspection
DESC RIPT IO N
This field appears only in stacking mode. Click the drop-down list to choose the slot
number of the Switch in a stack.
This field displays the port number. In stacking mode, the first number represents the slot
ID and the second is the port number. Please note that the default stacking ports (the last
four ports of your Switch) cannot be configured. They are reserved for stacking only.
Settings in this row apply to all ports.
Use this row only if you want to make some settings the same for all ports. Use this row first
to set the common settings and then make adjustments on a port-by-port basis.
Note: Changes in this row are copied to all the ports as soon as you make
them.
Select whether this port is a trusted port (
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 to save your changes to the Switch's run-time memory. The Switch loses these
Apply
changes if it is turned off or loses power, so use the
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.
>
IPv4 So urc e G ua rd Se tup
XS3800-28 User's Guide
329
) or an untrusted port (
T ruste d
Sa ve
> >
ARP Inspe c tio n C o nfig ure
).
Untruste d
link on the top navigation panel
Adva nc e d Applic a tio n
> .
VL AN