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Configuring Security
Configuring DHCP Snooping
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 1
STEP 2
STEP 3
Cisco 220 Series Smart Plus Switches Administration Guide Release 1.0.0.x
Configuring Option 82 Interface Settings
Use the Option82 Port Settings page to accept DHCP packets with Option 82
information that are received on the untrusted interfaces.
To define the action for packets received on an untrusted interface:
Click Security > DHCP Snooping > Option82 Port Settings.
Select the interface type (Port or LAG), click Go.
Select an interface and click Edit.
Enter the following information:
•
Interface—Select a port or a LAG.
•
Allow Untrusted—Choose one of the following actions when the untrusted
port receives DHCP packets:
Drop
-
—Drops DHCP packets with Option 82 information.
Keep
-
—Keeps DHCP packets with Option 82 information.
Replace
-
—Replaces DHCP packets with Option 82 information.
Click Apply. The Running Configuration is updated.
Configuring Option 82 Port CID Settings
Use the Option82 Port CID Settings page to configure the Option 82 circuit-ID
suboption.
To configure the Option 82 circuit-ID suboption:
Click Security > DHCP Snooping > Option82 Port CID Settings.
Click Add.
Enter the following information:
•
Interface—Select a port or a LAG.
•
VLAN Status—Check Enable to use circuit ID on a specific VLAN, or
uncheck to use circuit ID on all VLANs.
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