ZyXEL Communications GS1510-16, GS1510-24 18.5 Port Settings

Chapter 18 IP Source Guard

Table 30 DHCP Snooping (continued)

LABEL	DESCRIPTION
Server Ports	Select the ports that are connected to DHCP servers or other
	Switches and deselect the ports which are not.
	Server ports are connected to DHCP servers or other switches,
	and the Switch discards DHCP packets from trusted ports only if
	the rate at which DHCP packets arrive is too high.
	Untrusted ports are connected to subscribers, and the Switch
	discards DHCP packets from these ports in the following
	situations:
	• The packet is a DHCP server packet (for example, OFFER,
	ACK, or NACK).
	• The source MAC address and source IP address in the packet
	do not match any of the current bindings.
	• The packet is a RELEASE or DECLINE packet, and the source
	MAC address and source port do not match any of the current
	bindings.
	• The rate at which DHCP packets arrive is too high.
Select All	Click this to set all ports as server ports.
Deselect All	Click this to deselect all ports that are set as server ports.
Apply	Click this to save any changes to the Switch.
Refresh	Click this to reload the screen and reset any changes that were
	just made.
DHCP Snooping State	This field displays the current status of the DHCP snooping
	feature, Enabled or Disabled.
Enabled on VLAN	This field displays the VLAN IDs that have DHCP snooping
	enabled on them. This will display None if no VLANs have been
	set.
Server Ports	This field displays the ports which have been set as server ports.
	This will display None if no ports have been set

18.5 Port Settings

Use this screen to define the maximum number of hosts allowed to simultaneously connect to each port. Each host that successfully acquires an IP address from a

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	GS1510 Series User’s Guide