166
Server Screening List
No.
This field displays the index number of the DHCP server entry. Click
the number to modify the entry.
IP Address
This field displays the IP address of the DHCP server.
Action
Click
Delete
to remove a configured DHCP server.
7.1.2.
Binding Table
7.1.2.1.
Introduction
The DHCP Snooping binding table records the host information learned by DHCP snooping
function (dynamic) or set by user (static). The ARP inspection will use this table to forward or
drop the ARP packets. If the ARP packets sent by invalid host, they will be dropped. If the Lease
time is expired, the entry will be removed from the table.
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.
7.1.2.2.
CLI Configuration
Node
Command
Description
enable
show dhcp-snooping binding
This command displays the current
DHCP snooping binding table.
configure dhcp-snooping binding mac
MAC_ADDR ip IP_ADDR vlan
VLANID port PORT_NO
This command configures a static host
into the DHCP snooping binding table.
configure no dhcp-snooping binding mac
MACADDR
This command removes a static host
from the DHCP snooping binding table.
Example:
L2SWITCH#configure terminal
L2SWITCH(config)#dhcp-snooping binding mac 00:11:22:33:44:55 ip 1.1.1.1 vlan 1 port 2
L2SWITCH(config)#no dhcp-snooping binding mac 00:11:22:33:44:55
L2SWITCH#show dhcp-snooping binding
