Cisco Catalyst 2960-XR Security Configuration Manual page 200

Enabling DHCP Snooping and Option 82
SUMMARY STEPS
1. configure terminal
2. ip dhcp snooping
3. ip dhcp snooping vlan vlan-range []
4. ip dhcp snooping information option
5. ip dhcp snooping information option format remote-id [string ASCII-string | hostname]
6. ip dhcp snooping information option allow-untrusted
7. interface interface-id
8. ip dhcp snooping vlan vlan information option format-type circuit-id [override] string ASCII-string
9. ip dhcp snooping trust
10. ip dhcp snooping limit rate rate
11. exit
12. ip dhcp snooping verify mac-address
13. end
DETAILED STEPS
Command or Action
Step 1 configure terminal
Example:
Switch# configure terminal
Step 2
ip dhcp snooping
Example:
Switch(config)# ip dhcp snooping
Step 3 ip dhcp snooping vlan vlan-range []
Example:
Switch(config)# ip dhcp snooping vlan
10
Step 4 ip dhcp snooping information option
Example:
Switch(config)# ip dhcp snooping
information option
Step 5
ip dhcp snooping information option format
remote-id [string ASCII-string | hostname]
Catalyst 2960-XR Switch Security Configuration Guide, Cisco IOS Release 15.0(2)EX1
178
Purpose
Enters the global configuration mode.
Enables DHCP snooping globally.
Enables DHCP snooping on a VLAN or range of VLANs. The range is
1 to 4094.
• You can enter a single VLAN ID identified by VLAN ID number,
a series of VLAN IDs separated by commas, a range of VLAN
IDs separated by hyphens, or a range of VLAN IDs separated by
entering the starting and ending VLAN IDs separated by a space.
Enables the switch to insert and remove DHCP relay information
(option-82 field) in forwarded DHCP request messages to the DHCP
server. This is the default setting.
(Optional) Configures the remote-ID suboption.
You can configure the remote ID as:
Configuring DHCP
OL-29434-01