DHCP performance supported by the AR

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What is the support of DHCP on an AR
The support for DHCP functions on the AR is as follows: - DHCP server: All AR models of all versions support the DHCP server. - DHCP relay: All AR models of all versions support the DHCP relay agent. - DHCP snooping: Starting from V200R003C00, all AR models support DHCP snooping. - DHCP client: All AR models of all versions support the DHCP client.

Static DHCP binding supported by the AR
All AR models of all versions can allocate fixed IP addresses to clients.

Number of DHCP access users supported by the AR
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Can DHCP snooping be implemented on an AR with no LAN card
DHCP snooping can only be provided by the LAN card. To limit source MAC addresses without a LAN card installed, the AR can use a Layer 2 ACL. However, Layer 2 ACL is not a replacement for DHCP snooping.

DHCP on an AR
DHCP dynamically configures and uniformly manages network parameters of hosts on a TCP/IP network. DHCP provides the following functions: - Dynamic allocation: DHCP allocates an IP address with a limited validity period (called lease) to a client. This mechanism applies to hosts that temporarily connect to a network with fewer IP addresses than the total number of hosts and hosts do not need to permanently connect to the network. For example, this mechanism can be used to allocate IP addresses to laptops used by employees on business trips or mobile terminals in cafes. - Static allocation: Fixed IP addresses are assigned to specified hosts. This mechanism applies to hosts with special IP address requirements. For example, the file server of an enterprise needs to use a fixed IP address to provide services for extranet users. Compared with manual IP address configuration, DHCP static allocation prevents manual configuration errors and helps network administrators perform unified maintenance and management. DHCP can allocate other network parameters except for the IP address to hosts, including the DNS server address, routing information, and gateway address.

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