IP Service Configuration
DHCP Server Configuration
The Dynamic Host Configuration Protocol (DHCP) is a technology used for centralized management and configuration of user IP addresses. Following the RFC 2131 standard, DHCP operates in a client/server communication model, where DHCP clients send requests to DHCP servers.
DHCP Relay Configuration
Since DHCP uses broadcasting to send request messages during the IP address dynamic allocation process, it is suitable only for cases where the DHCP client and server are within the same subnet. When the DHCP server and client are not in the same subnet, the DHCP relay mechanism needs to be employed.
DHCP Snooping Configuration
DHCP Snooping monitors DHCP-REQUEST and trusted port received DHCP-ACK messages, recording DHCP Snooping entries including client MAC addresses, assigned IP addresses, VLANs, and other information. When DHCP Snooping is enabled, devices forward DHCP client's DHCP request messages through trusted ports to legitimate DHCP servers, and the device generates Snooping Binding Table (SNP) entries based on the DHCP ACK response from the server.
ND Snooping Configuration
The ND Snooping (Neighbor Discovery Snooping) feature is designed for Layer 2 switching environments and serves a similar purpose to DHCP Snooping in IPv6 networks. It records information such as the source IPv6 address, source MAC address, and incoming port of packets.