Figure 6-11 Dhcp Server And Client Networking; Figure 6-12 Structure Of A Dhcp Packet - Raisecom ISCOM2600G-HI (A) Series Configuration Manual

Raisecom
ISCOM2600G-HI (A) Series Configuration Guide
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After a DHCP client obtains the IP address from the DHCP server, it cannot use the IP address
permanently but in a fixed period, which is called the lease period. You can specify the
duration of the lease period.
DHCP ensures rational allocation, avoids waste of IP addresses, and improves the utilization
rate of IP addresses on the entire network.
The ISCOM2600G-HI series switch, as the DHCP server, assigns dynamic IP addresses to
clients, as shown in Figure 6-11.

Figure 6-11 DHCP Server and Client networking

DHCP packets
Figure 6-12 shows the structure of a DHCP packet. The DHCP packet is encapsulated in a
UDP data packet.

Figure 6-12 Structure of a DHCP packet

Table 6-4 describes fields of a DHCP packet.
The number of hosts on the network is greater than that of IP addresses, which makes it
unable to assign a fixed IP address for each host and restricts the number of users
connected to network simultaneously.
Only the minority of hosts on the network need fixed IP addresses, most of hosts have no
requirement for fixed IP address.
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