Chapter 25 Dhcp Server Screening Command List - D-Link DWS-3160-24TC Cli Reference Manual

DWS-3160 Series Gigabit Ethernet Unified Switch CLI Reference Guide
Chapter 25 DHCP Server Screening
config filter dhcp_server [add permit server_ip <ipaddr> {client_mac <macaddr>} ports
[<portlist> | all] | delete permit server_ip <ipaddr> {client_mac <macaddr>} ports [<portlist> |
all] | ports [<portlist> | all] state [enable | disable] | illegal_server_log_suppress_duration [1min
| 5min | 30min] | trap_log [enable | disable]]
show filter dhcp_server
25-1 config filter dhcp_server
Description
This command is used to configure the state of the function for filtering of DHCP server packet and
to add/delete the DHCP server/client binding entry. With DHCP server screening function, illegal
DHCP server packet will be filtered.
This command is useful for projects that support per port control of the DHCP server screening
function. The filter can be based on the DHCP server IP address, or based on a binding of the
DHCP server IP and client MAC address.
The command has two purposes: To Specifies to filter all DHCP server packets on the specific port
and to Specifies to allow some DHCP server packets with pre-defined server IP addresses and
client MAC addresses. With this function, we can restrict the DHCP server to service specific
DHCP clients. This is useful when two DHCP servers are present on the network, one of them
provides the private IP address, and one of them provides the IP address.
Enabling filtering of the DHCP server port state will create one access profile and create one
access rule per port (UDP port = 67). Filter commands in this file will share the same access profile.
Addition of a permit DHCP entry will create one access profile and create one access rule. Filtering
commands in this file will share the same access profile.
Format
config filter dhcp_server [add permit server_ip <ipaddr> {client_mac <macaddr>} ports
[<portlist> | all] | delete permit server_ip <ipaddr> {client_mac <macaddr>} ports [<portlist>
| all] | ports [<portlist> | all] state [enable | disable] | illegal_server_log_suppress_duration
[1min | 5min | 30min] | trap_log [enable | disable]]
Parameters
add permit - Specifies to add a DHCP permit.
server_ip - The IP address of the DHCP server to be filtered.
<ipaddr> - Enter the DHCP server IP address here.
client_mac - (Optional) The MAC address of the DHCP client.
<macaddr> - Enter the DHCP client MAC address here.
ports - The port number of filter DHCP server.
<portlist> - Enter the list of ports to be configured here.
all - Specifies that all the port will be used for this configuration.
delete permit - Specifies to delete a DHCP permit.
server_ip - The IP address of the DHCP server to be filtered.
Command List
288