H3C S3600 Series User Manual

Operation Manual – Management VLAN
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 2
DHCP/BOOTP Client Configuration
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DHCP Client
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DHCP Client
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DHCP Client
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Figure 2-2 The interaction between a DHCP client and a DHCP server
To obtain a valid IP address dynamically, a DHCP client exchanges different
information with the DHCP server in different phases. Usually, the following three
phases are involved.
1) The DHCP client accesses the network for the first time
When a DHCP client accesses a network for the first time, it goes through the following
four phases to establish connections with the DHCP server.
z Discovery. The DHCP client tries to discover a DHCP server by broadcasting
DHCP_Discover packets in the network. Only DHCP servers respond to this type
of packets.
z Offering IP addresses. Upon receiving DHCP_Discover packets, each DHCP
server selects a free IP address from an address pool and sends a DHCP_Offer
packet that carries the selected IP address and other configuration information to
the DHCP client.
z Selecting the IP address to be used. The DHCP client only accepts and processes
the first-arrived DHCP_Offer packet (if multiple DHCP servers send DHCP_Offer
packets to it), and broadcasts a DHCP_Request packet to each DHCP server. The

H3C S3600 Series Specifications

General

Brand	H3C
Model	S3600 Series
Category	Switch
Language	English