Deleting Dhcp Lease Database; Dhcp Relay Agent; Fig. 8.32 Example Of Dhcp Relay Agent - Siemens S223 User Manual

UMN:CLI
8.8.3.3
8.8.4
250

Deleting DHCP Lease Database

To delete a DHCP lease database, use the following command.
Command
clear ip dhcp leasedb A.B.C.D/M
clear ip dhcp leasedb pool
POOL
clear ip dhcp leasedb all

DHCP Relay Agent

A DHCP relay agent is any host that forwards DHCP packets between clients and servers.
The DHCP relay agents are used to forward DHCP requests and replies between clients
and servers when they are not on the same physical subnet. The DHCP relay agent for-
warding is distinct from the normal forwarding of an IP router, where IP datagrams are
switched between networks somewhat transparently.
By contrast, DHCP relay agents receive DHCP messages and then generate a new
DHCP message to send out on another interface. The DHCP relay agent sets the gate-
way address and, if configured, adds the DHCP option 82 information in the packet and
forwards it to the DHCP server. The reply from the server is forwarded back to the client
after removing the DHCP option 82 information.
Relay Agent 1
Subnet 1
*PC= DHCP Client
Example of DHCP Relay Agent
Fig. 8.32
To activate/deactivate the DHCP function in the system, use the following command.
Command
service dhcp
no service dhcp
SURPASS hiD 6615 S223/S323 R1.5
Mode
Deletes a DHCP lease database a specified subnet.
Enable
Deletes a DHCP lease database of a specified DHCP
Global pool.
Deletes the entire DHCP lease database.
DHCP Server
Subnet 2
Mode
Activates the DHCP function in the system.
Global
Deactivates the DHCP function in the system.
User Manual
Description
Relay Agent 2
Description
A50010-Y3-C150-2-7619