 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 Server 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 Relay 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.

DHCP 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.

ND Snooping Configuration

 Snooping entries include DHCP Snooping entries, ND Snooping entries, and user static binding entries, collectively referred to as SNP entries.  These entries play a crucial role in performing security functions and MAC detection.

Snooping Table Synchronization Configuration

 MAC-scan provides an automatic scanning function to detect the correlation between MAC addresses and IP addresses in the network.  When there are terminals that cannot actively send ARP packets and the access devices cannot learn the corresponding ARP entries in a timely manner, other terminals in the network might face communication issues while trying to access these terminals.

MAC-Scan Configuration

MAC-Trigger Configuration

MC-LAG Configuration

IP Service Configuration

delete-span-style

Enterprise & Campus Network

Preface

Applicable Hardware Models

Basic Configuration

Interface Management Configuration

VLAN Configuration

MAC Address Table Configuration

QinQ Configuration

MSTP Configuration

Ethernet Link Aggregation Configuration

Ethernet Switch Configuration

BGP Configuration

OSPF Basic Configuration

Policy Routing Configuration

IP Routing Configuration

IGMP Snooping Configuration

MLD Snooping Configuration

Multicast VLAN Configuration

PIM-ASM Configuration

IP Multicast Configuration

ARP Attack Detection Configuration

IPSG Configuration

SAVI Configuration

RA Guard Configuration

Storm Suppression Configuration

ACL Configuration

Security Configuration

AAA Configuration

802.1x Authentication Configuration

User Access and Authentication

BFD Configuration

Monitor-Link Configuration

TRACK and SLA Configuration

VRRP Configuration

Reliability Configuration

PTP Configuration

SyncE Configuration

SNMP Configuration

sFlow Configuration

Traffic Mirroring Configuration

Network Management and Monitoring Configuration

QoS Configuration

MACsec configuration

VXLAN Configuration

Configuration Guide

Traffic Suppression And Storm Control Configuration

User Binding Rule Configuration

IPv6 RA Guard Configuration

ARP Detection Configuration

MAC Detection Configuration

Copp Speed limit

Priority Map Configuration

Traffic Regulation

Queue Scheduling

Mirror Configuration

SFLOW Configuration

Syslog Configuration

Network Management And Monitoring

Monitor Link Configuration

TRACK

IP-Conflict Configuration

Local User Configuration

TACACS Configuration

RADIUS Configuration

802.1X Authentication Configuration

User Access And Authentication

GRE Configuration

MACsec Configuration

EVPN Configuration

Login System

Command Line Configuration Interface

Management Port Configuration

Device Upgrade

System Boot Configuration

Device Status

Device Configuration

NTP Configuration

System Time Configuration

POE Configuration

Log Threshold Configuration

Diagnostic-information Configuration

Device Management

Interface Management

Link Aggregation Configuration

LLDP Configuration

MAC Configuration

Interface Isolation Group Configuration

STP Configuration

Loopback Detection Configuration

Ethernet Switching

IPv4 Configuration

ARP Configuration

ARP To Host Routing Configuration

IPv6 Configuration

IP Service

Static Route Configuration

OSPFv2 Configuration

OSPFv3 Configuration

Route Map

Policy Route Configuration

IP Unicast Routing

PIM Configuration

IP Multicast

Command Line Reference