Dell Force10 S4810P FTOS Command Line Reference Guide for the S4810 System FTO - Page 664
ip dhcp relay, ip dhcp snooping, C-Series, S4810
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ip dhcp relay Enable Option 82. C-Series, E-Series, S-Series, S4810 Syntax Parameters ip dhcp relay information-option [remote-id | trust-downstream] remote-id trust-downstream Configure the system to enable the remote-id string in option-82. Configure the system to trust Option 82 when it is received from the previous-hop router. Defaults Command Modes Command History Disabled CONFIGURATION Version 8.3.7.0 Version 8.3.1.0 Version 7.8.1.0 Introduced on the S4810. Introduced on the E-Series. Introduced on the C-Series and S-Series. ip dhcp snooping Enable DHCP snooping globally. C-Series, E-Series, Z-Series, S-Series Syntax Defaults Command Modes Command History [no] ip dhcp snooping Disabled CONFIGURATION Version 8.3.11.1 Version 8.3.1.0 Version 8.2.1.0 Version 7.8.1.0 Introduced on the Z9000. Introduced on the E-Series. Introduced on the C-Series and S-Series on Layer 2 interfaces. Introduced on the C-Series and S-Series on Layer 3 interfaces. Usage Information Related Commands When enabled, no learning takes place until you enable snooping on a VLAN. After disabling DHCP snooping, the binding table deletes and Option 82, IP Source Guard, and Dynamic ARP Inspection are disabled. Introduced in FTOS version 7.8.1.0, DHCP snooping was available for Layer 3 only and dependent on DHCP Relay Agent (ip helper-address). FTOS version 8.2.1.0 extends DHCP Snooping to Layer 2. You do not have to enable relay agent to snoop on Layer 2 interfaces. ip dhcp snooping vlan - enables DHCP snooping on one or more VLANs. 664
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