D-Link DES-1210-28/ME - Create SNMP User

DES-1210-28/ME Metro Ethernet Managed Switch CLI Reference Guide
41
11
1111
11
DHCP SERVER SCREENING COMMANDS
The DHCP server screenint commands in the Command Line Interface (CLI) are listed (along with the
appropriate parameters) in the following table.
Due to this function allow you not only to restrict all DHCP Server packets but also to receive any
specified DHCP server packet by any specified DHCP client, it is useful when one or more than one
DHCP servers are present on the network and both provide DHCP services to different distinct groups of
clients.
When DHCP Server Screening function is enabled, all DHCP Server packets will be filtere from a specif ic
port. Also, you are allow to create entries for specific Server IP address an d Client MAC address bi
nding by por t-based. Be aware th a tthe DHCP Ser ver Screen ing f uncti n must b e enabled first On ce
all sett ng is do ne, all DHC P Serve packe s wi ll be filtered fro m a speci fic port e cep t those tha meet
th e Se ver IP Ad dres s and Cli ent M AC Addres s binding .
Command Parameter
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]]
show filter dhcp_server
config dhcp_server
screening ports
<portlist> state [enable | disable]
show dhcp_server
screening
Each command is listed in detail, as follows:
config filter dhcp_server
Purpose DHCP server packets except those that have been IP/client MAC
bound will be filtered. 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.
Syntax
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]]
Description
The config filter dhcp_server command has two purposes: To filter
all DHCP server packets on the specified port(s) and to allow some
DHCP server packets to forwarded if they are on the pre-defined
server IP address/MAC address binding list. Thus the DHCP server
can be restricted to service a specified DHCP client. This is useful
when there are two or more DHCP servers present on f network.
Parameters
<ipaddr> – The IP address of the DHCP server to be filtered
<macaddr> – The MAC address of the DHCP client.
state – Enable/Disable the DHCP filter state
ports <portlist> – The port number to which the DHCP filter will be
applied.