Brocade Communications Systems Brocade ICX 6650 6650 Manuel D’Utilisation

DHCP snooping

Clearing the DHCP binding database

You can clear the DHCP binding database using the CLI command clear dhcp. You can remove all 
entries in the database, or remove entries for a specific IP address only.

To remove all entries from the DHCP binding database, enter the clear dhcp command.

Brocade# clear dhcp

To clear entries for a specific IP address, enter a command such as the following.

Brocade# clear dhcp 10.10.102.4

Syntax: clear dhcp [ip-addr]

Displaying DHCP snooping status and ports

To display the DHCP snooping status for a VLAN and the trusted/untrusted port, use the show ip 
dhcp snooping vlan command. 

Syntax: show ip dhcp snooping [vlan vlan-id]

Displaying the DHCP snooping binding database

To display the DHCP snooping binding database, use the show ip dhcp snooping info command.

Syntax: show ip dhcp snooping info

Displaying DHCP binding entry and status

To display the DHCP binding entry and its current status, use the show arp command.

Syntax: show arp

Brocade# show ip dhcp snooping vlan 2
IP DHCP snooping VLAN 2: Enabled

Brocade# show ip dhcp snooping info
Dhcp snooping Info
Total learnt entries 1
SAVED DHCP ENTRIES IN FLASH
       IP Address       Mac Address     Port  vlan  lease
0      10.10.10.20      0000.0002.0003  1/1/3  1112  361

Brocade# show arp 
Total number of ARP entries: 2, maximum capacity: 6000
No.

IP Address          MAC Address      Type     Age      Port     Status

1     10.43.1.1           0000.0001.c320   Dynamic  0        mgmt1    Valid
2     10.43.1.199         0000.0002.b263   Dynamic  7        mgmt1    Valid