ZyXEL Communications GS-2750 - Manual (Page 199)

Chapter 24 IP Source Guard
GS-2750 User’s Guide
199
24.2 IP Source Guard
Use this screen to look at the current bindings for DHCP snooping and ARP inspection.
Bindings are used by DHCP snooping and ARP inspection to distinguish between authorized
and unauthorized packets in the network. The Switch learns the bindings by snooping DHCP
packets (dynamic bindings) and from information provided manually by administrators (static
bindings). To open this screen, click Advanced Application > IP Source Guard.
Figure 96 IP Source Guard
The following table describes the labels in this screen.
24.3 IP Source Guard Static Binding
Use this screen to manage static bindings for DHCP snooping and ARP inspection. Static
bindings are uniquely identified by the MAC address and VLAN ID. Each MAC address and
VLAN ID can only be in one static binding. If you try to create a static binding with the same
MAC address and VLAN ID as an existing static binding, the new static binding replaces the
original one. To open this screen, click Advanced Application > IP Source Guard > Static
Binding.
Table 69 IP Source Guard
LABEL DESCRIPTION
Index This field displays a sequential number for each binding.
MAC Address This field displays the source MAC address in the binding.
IP Address This field displays the IP address assigned to the MAC address in the
binding.
Lease This field displays how many days, hours, minutes, and seconds the
binding is valid; for example, 2d3h4m5s means the binding is still valid for
2 days, 3 hours, 4 minutes and 5 seconds. This field displays infinity if the
binding is always valid (for example, a static binding).
Type This field displays how the Switch learned the binding.
static: This binding was learned from information provided manually by an
administrator.
dhcp-snooping: This binding was learned by snooping DHCP packets.
VID This field displays the source VLAN ID in the binding.
Port This field displays the port number in the binding. If this field is blank, the
binding applies to all ports.