Brocade FastIron Ethernet Switch Security Configuration Guide - Manual (Page 340)

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.
device#clear dhcp
To clear entries for a specific IP address, enter a command such as the following.
device#clear dhcp 10.10.102.4
Syntax: clear dhcp ip-address
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.
device#show ip dhcp snooping vlan 2
IP DHCP snooping VLAN 2: Enabled
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.
device#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 6/13
1112 361
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.
device#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
Syntax: show arp
For field definitions, refer to Table 25 in the FastIron Ethernet Switch Layer 3 Routing Configuration
Guide .
Clearing the DHCP binding database
340 FastIron Ethernet Switch Security Configuration Guide
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