User's Manual
Table Of Contents
- 1. INTRODUCTION
- 2. INSTALLATION
- 3. SWITCH MANAGEMENT
- 4. WEB CONFIGURATION
- 4.1 Main Web Page
- 4.2 System
- 4.3 Port Management
- 4.4 Link Aggregation
- 4.5 VLAN
- 4.5.1 VLAN Overview
- 4.5.2 IEEE 802.1Q VLAN
- 4.5.3 Management VLAN
- 4.5.4 Create VLAN
- 4.5.5 Interface Settings
- 4.5.6 Port to VLAN
- 4.5.7 Port VLAN Membership
- 4.5.8 Protocol VLAN Group Setting
- 4.5.9 Protocol VLAN Port Setting
- 4.5.10 GVRP Setting
- 4.5.11 GVRP Port Setting
- 4.5.12 GVRP VLAN
- 4.5.13 GVRP Statistics
- 4.5.14 VLAN setting example:
- 4.6 Spanning Tree Protocol
- 4.7 Multicast
- 4.8 Quality of Service
- 4.9 Security
- 4.10 ACL
- 4.11 MAC Address Table
- 4.12 LLDP
- 4.13 Diagnostics
- 4.14 Power over Ethernet (GS-4210-16P2S and GS-4210-24P2S only)
- 4.15 RMON
- 4.16 Maintenance
- 5. COMMAND LINE INTERFACE
- 6. Command Line Mode
- 6.1 User Mode Commands
- 6.2 Privileged Mode Commands
- 6.2.1 clear command
- 6.2.2 clock command
- 6.2.3 configure command
- 6.2.4 copy command
- 6.2.5 debug command
- 6.2.6 delete command
- 6.2.7 disable command
- 6.2.8 end command
- 6.2.9 exit command
- 6.2.10 no command
- 6.2.11 ping command
- 6.2.12 reboot command
- 6.2.13 renew command
- 6.2.14 restore-defaults command
- 6.2.15 save command
- 6.2.16 show command
- 6.2.17 ssl command
- 6.2.18 traceroute command
- 6.2.19 udld command
- 6.3 Global Config Mode Commands
- 6.3.1 aaa Command
- 6.3.2 boot Command
- 6.3.3 bridge Command
- 6.3.4 class-map Command
- 6.3.5 clock Command
- 6.3.6 dos Command
- 6.3.7 dot1x Command
- 6.3.8 do Command
- 6.3.9 enable Command
- 6.3.10 end Command
- 6.3.11 errdisable Command
- 6.3.12 exit Command
- 6.3.13 gvrp Command
- 6.3.14 hostname Command
- 6.3.15 interface Command
- 6.3.16 ip Command
- 6.3.17 ipv6 Command
- 6.3.18 jumbo-frame Command
- 6.3.19 l2 Command
- 6.3.20 lacp Command
- 6.3.21 lag Command
- 6.3.22 line Command
- 6.3.23 lldp Command
- 6.3.24 logging Command
- 6.3.25 mac Command
- 6.3.26 management-vlan Command
- 6.3.27 mirror Command
- 6.3.28 no Command
- 6.3.29 policy-map Command
- 6.3.30 port-security Command
- 6.3.31 qos Command
- 6.3.32 radius Command
- 6.3.33 rate-limit Command
- 6.3.34 rmon Command
- 6.3.35 Snmp Command
- 6.3.36 sntp Command
- 6.3.37 spanning-tree Command
- 6.3.38 storm-control Command
- 6.3.39 system Command
- 6.3.40 tacacs Command
- 6.3.41 udld Command
- 6.3.42 username Command
- 6.3.43 vlan Command
- 6.3.44 voice-vlan Command
- 7. SWITCH OPERATION
- 8. POWER OVER ETHERNET OVERVIEW
- 9. TROUBLESHOOTING
- APPENDIX A
User’s Manual of GS-4210-16T2S_24T2S_16P2S_24P2S_48T4S
278
4.9.5 IP Source Guard
IP Source Guard is a secure feature used to restrict IP traffic on DHCP snooping untrusted ports by filtering traffic based on the
DHCP Snooping Table or manually configured IP Source Bindings. It helps prevent IP spoofing attacks when a host tries to
spoof and use the IP address of another host.
After receiving a packet, the port looks up the key attributes (including IP address, MAC address and VLAN tag) of the packet in
the binding entries of the IP source guard. If there is a matching entry, the port will forward the packet. Otherwise, the port will
abandon the packet.
IP source guard filters packets based on the following types of binding entries:
IP-port binding entry
MAC-port binding entry
IP-MAC-port binding entry