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Configuring IPv4 IMPB
2.2.2 Binding Entries via DHCP Snooping
Follow these steps to bind entries via DHCP Snooping:
Step 1
Step 2
Step 3
Step 4
Step 5
Step 6
Step 7
Step 8
The following example shows how to enable DHCP Snooping globally and on VLAN 5, and
set the maximum number of binding entries port 1/0/1 can learn via DHCP snooping as
100:
Switch#configure
Switch(config)#ip dhcp snooping
Switch(config)#ip dhcp snooping vlan 5
Switch(config)#interface gigabitEthernet 1/0/1
Switch(config-if)#ip dhcp snooping max-entries 100
Switch(config-if)#show ip dhcp snooping
Global Status: Enable
configure
Enter global configuration mode.
ip dhcp snooping
Globally enable DHCP Snooping.
ip dhcp snooping vlan vlan-range
Enable DHCP Snooping on the specified VLAN.
Enter the vlan range in the format of 1-3, 5.
vlan-range:
interface { fastEthernet port | range fastEthernet port-list | gigabitEthernet port | range
gigabitEthernet port-list | ten-gigabitEthernet port | range ten-gigabitEthernet port-list |
interface port-channel port-channel-id | interface range port-channel port-channel-id-list }
Enter interface configuration mode.
ip dhcp snooping max-entries value
Configure the maximum number of binding entries the port can learn via DHCP snooping.
Enter the value of maximum number of entries. The valid values are from 0 to 512.
value:
show ip dhcp snooping
Verify global configuration of DHCP Snooping.
end
Return to privileged EXEC mode.
copy running-config startup-config
Save the settings in the configuration file.
IP-MAC Binding Configuration
Configuration Guide
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