R21xx-HP FlexFabric 11900 Layer 3 IP Services Configuration Guide

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Task Command Remarks
Display DHCP snooping entries.
display dhcp snooping binding [ ip
ip-address [ vlan vlan-id ] ]
Available in any view.
Display Option 82 configuration
information on the DHCP snooping
device.
display dhcp snooping information { all |
interface interface-type interface-number }
Available in any view.
Display DHCP packet statistics on the
DHCP snooping device (in standalone
mode).
display dhcp snooping packet statistics
[ slot slot-number ]
Available in any view.
Display DHCP packet statistics on the
DHCP snooping device (in IRF mode).
display dhcp snooping packet statistics
[ chassis chassis-number slot slot-number ]
Available in any view.
Display information about trusted
ports.
display dhcp snooping trust Available in any view.
Display information about the file that
stores DHCP snooping entries.
display dhcp snooping binding database Available in any view.
Clear DHCP snooping entries.
reset dhcp snooping binding { all | ip
ip-address [ vlan vlan-id ] }
Available in user
view.
Clear DHCP packet statistics on the
DHCP snooping device (in standalone
mode).
reset dhcp snooping packet statistics [ slot
slot-number ]
Available in user
view.
Clear DHCP packet statistics on the
DHCP snooping device (in IRF mode).
reset dhcp snooping packet statistics
[ chassis chassis-number slot slot-number ]
Available in user
view.
DHCP snooping configuration examples
Basic DHCP snooping configuration example
Network requirements
As shown in Figure 29, configure the port Ten-GigabitEthernet 1/0/1 connected to the DHCP server as
a trusted port and configure other ports as untrusted ports. Enable DHCP snooping to record clients'
IP-MAC bindings by reading DHCP-ACK messages received from the trusted port and DHCP-REQUEST
messages.