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11-4

Configuring Advanced Threat Protection

DHCP Snooping

Enabling DHCP Snooping

DHCP snooping is enabled globally by entering this command:

HP Switch(config)# dhcp-snooping

Use the no form of the command to disable DHCP snooping.

To display the DHCP snooping configuration, enter this command:

HP Switch(config)# show dhcp-snooping

An example of the output is shown below.

vlan]

authorized server: Enter the IP address of a trusted DHCP

server. If no authorized servers are configured, all DHCP

server addresses are considered valid.

Maximum: 20 authorized servers

database: To configure a location for the lease database,

enter a URL in the format tftp://ip-addr/ascii-string. The

maximum number of characters for the URL is 63.

option

: Add relay information option (Option 82) to DHCP

client packets that are being forwarded out trusted ports.

The default is

yes, add relay information.

trust

: Configure trusted ports. Only server packets received

on trusted ports are forwarded. Default: untrusted.

verify

: Enables DHCP packet validation. The DHCP client

hardware address field and the source MAC address must

be the same for packets received on untrusted ports or the

packet is dropped. Default:

Yes

vlan

: Enable DHCP snooping on a vlan. DHCP snooping

must be enabled already. Default:

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HP E3800 Series Specifications

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