Command Line Reference Guide

NOTE: Learning only happens if there is a trusted port in the VLAN.
Related
Commands
ip dhcp snooping trust — configures an interface as trusted.
ip dhcp relay
Enable Option 82.
Syntax
ip dhcp relay information-option [remote-id | trust-downstream]
Parameters
remote-id Configure the system to enable the remote-id string in
option-82.
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
Version 8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
show ip dhcp snooping
Display the contents of the DHCP binding table or display the interfaces configured with IP Source Guard.
Syntax
show ip dhcp snooping [binding | source-address-validation]
Parameters
binding Display the interfaces configured with IP Source Guard.
source-
address-
validation
Display the interfaces configured with IP Source Guard.
Defaults none
Command
Modes
• EXEC
• EXEC Privilege
Command
History
Version 8.3.16.1 Introduced on the MXL 10/40GbE Switch IO Module.
Dynamic Host Configuration Protocol (DHCP)
501