Huawei S9300 Configuration Manual page 58

S9300&S9300E Terabit Routing Switch
Configuration Guide - IP Service
Usage
DHCP/BOOTP client
Using the S9300&S9300E as a DHCP Server
The S9300&S9300E can function as a DHCP server to allocate IP addresses to clients. A client
sends a packet to the server to request for configurations such as the IP address, subnet mask,
and default gateway. After receiving the packet, the server replies with a packet carrying the
corresponding configurations according to policies. Both the Request and Reply packets are
encapsulated in UDP packets.
The S9300&S9300E allocates IP addresses to clients by using the global address pool or an
interface address pool.
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Using the S9300&S9300E as a DHCP Relay Agent
When functioning as a DHCP relay agent, the S9300&S9300E forwards the DHCP packets to
the DHCP servers or clients on different network segments. The DHCP clients on different
networks can use one DHCP server. The DHCP relay agent saves costs and facilitates device
management.
After receiving a DHCP packet from a DHCP client, the S9300&S9300E functioning as a DHCP
relay agent forwards the DHCP packet to a DHCP server, and then the DHCP server allocates
an IP address to the client. For details about configuring the DHCP relay agent, see
Configuring the DHCP Relay
Application
The S9300&S9300E functions as a DHCP server and is in the same network segment as the
DHCP clients. On this network, the DHCP server can use the global address pool or the interface
address pool.
Issue 01 (2012-03-15)
Using the global address pool: When an interface of the S9300&S9300E receives a DHCP
packet from a DHCP client, the S9300&S9300E allocates an IP address to the client from
the global address pool. For details about configuring the global address pool, see
Configuring the DHCP Server Based on the Global Address
Using an interface address pool: When an interface of the S9300&S9300E receives a DHCP
packet from a DHCP client, the S9300&S9300E allocates an IP address to the client from
the interface address pool. For details about configuring the interface address pool, see
Configuring the DHCP Server Based on the VLANIF Interface Address
NOTE
The S9300&S9300E supports the DHCP snooping function. For details about DHCP snooping, see the
S9300&S9300E Terabit Routing Switch Configuration Guide - Security.
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Scenario
The DHCP clients and DHCP server are on
the same network segment or on different
network segments.
Agent.
3 DHCP Configuration
3.3
Pool.
3.4
Pool.
3.5
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