Ip Dhcp Relay; Ip Dhcp Snooping - Dell Force10 S4810P Reference Manual

ip dhcp relay

Enable Option 82.
C-Series, E-Series, S-Series, S4810
Syntax ip dhcp relay information-option [remote-id | trust-downstream]
Parameters
remote-id
trust-downstream
Defaults Disabled
Command Modes CONFIGURATION
Command History
Version 8.3.7.0
Version 8.3.1.0
Version 7.8.1.0

ip dhcp snooping

Enable DHCP snooping globally.
C-Series, E-Series, Z-Series, S-Series
Syntax [no] ip dhcp snooping
Defaults Disabled
Command Modes CONFIGURATION
Command History
Version 8.3.11.1
Version 8.3.1.0
Version 8.2.1.0
Version 7.8.1.0
Usage
When enabled, no learning takes place until you enable snooping on a VLAN. After disabling
Information
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.
Related ip dhcp snooping vlan
Commands
664
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.
Introduced on the S4810.
Introduced on the E-Series.
Introduced on the C-Series and S-Series.
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.
– enables DHCP snooping on one or more VLANs.