Dasan V5808 - Forcing Release or Renewal of DHCP Lease; Displaying DHCP Client Configuration; DHCP Packet Filtering

User Manual UMN:CLI
V5808
357
8.5.9.7 Forcing Release or Renewal of DHCP Lease
The V5808 supports two independent operation: immediate release a DHCP lease for a
DHCP client and force DHCP renewal of a lease for a DHCP client.
To force a release or renewal of a DHCP release for a DHCP client, use the following
command.
Command
Mode
Description
release dhcp INTERFACE
Enable
Forces a release of a DHCP lease.
renew dhcp INTERFACE
Forces a renewal of a DHCP lease.
8.5.9.8 Displaying DHCP Client Configuration
To display a DHCP client configuration, use the following command.
Command
Mode
Description
show ip dhcp client
[INTERFACE]
Enable
Global
Interface
Shows a configuration of DHCP client.
8.5.10 DHCP Filtering
8.5.10.1 DHCP Packet Filtering
For the V5808, it is possible to block the specific client with MAC address. If the MAC
address blocked by administrator requests an IP address, the server does not assign IP.
This function is to strength the security of DHCP server.
The following is the function of blocking to assign IP address on a port.
Command
Mode
Description
ip dhcp filter-port PORTS
Global
Configures a port in order not to assign IP.
no ip dhcp filter-port PORTS
Disables DHCP packet filtering.
The following is to designate MAC address which IP address is not assigned.
Command
Mode
Description
ip dhcp filter-address MAC-
ADDR
Global
Blocks a MAC address in case of requesting IP
address.
MAC-ADDR: MAC address
no ip dhcp filter-address
MAC-ADDR
Disables DHCP MAC filtering.