TP-Link TL-SG5426 User Guide - Page 231
DHCP Snooping VLAN Configuration, DHCP Snooping Information Option Configuration, Command Attributes
UPC - 845973020729
View all TP-Link TL-SG5426 manuals
Add to My Manuals
Save this manual to your list of manuals |
Page 231 highlights
3 Configuring the Switch DHCP Snooping VLAN Configuration Enables DHCP snooping on the specified VLAN. Command Attributes • VLAN ID - ID of a configured VLAN. (Range: 1-4094) • DHCP Snooping Status - Enables or disables DHCP snooping for the selected VLAN. When DHCP snooping is enabled globally on the switch, and enabled on the specified VLAN, DHCP packet filtering will be performed on any untrusted ports within the VLAN. Web - Click DHCP Snooping, VLAN Configuration. Figure 3-115 DHCP Snooping VLAN Configuration CLI - This example first enables DHCP Snooping for VLAN 1. Console(config)#ip dhcp snooping vlan 1 Console(config)# 4-233 DHCP Snooping Information Option Configuration DHCP provides a relay mechanism for sending information about the switch and its DHCP clients to the DHCP server. Known as DHCP Option 82, it allows compatible DHCP servers to use the information when assigning IP addresses, or to set other services or policies for clients. When the DHCP Snooping Information Option is enabled, clients can be identified by the switch port to which they are connected rather than just their MAC address. DHCP client-server exchange messages are then forwarded directly between the server and client without having to flood them to the entire VLAN. In some cases, the switch may receive DHCP packets from a client that already includes DHCP Option 82 information. The switch can be configured to set the action policy for these packets. Either the switch can discard the DHCP information, keep the existing information, or replace it with the switch's relay information. Note: DHCP snooping must be enabled on the switch for the DHCP Option 82 information to be inserted into packets. 3-188