Reference Guide

ip dhcp relay
Enable Option 82.
Z9000
Syntax
ip dhcp relay information-option [trust-downstream]
Parameters
trust-downstream Configure the system to trust Option 82 when it is received from the
previous-hop router.
Defaults Disabled.
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on the C-Series and S-Series.
ip dhcp snooping
Enable DHCP Snooping globally.
Z9000
Syntax
[no] ip dhcp snooping
Defaults Disabled.
Command Modes CONFIGURATION
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced on the C-Series and S-Series.
Usage
Information
When enabled, no learning takes place until you enable snooping on a VLAN. After disabling
DHCP Snooping, the binding table is deleted and Option 82, IP Source Guard, and Dynamic ARP
Inspection are disabled.
1282