4000 Router Series Layer 3 - IP Services Configuration Guide

ManualsBrandsHP ManualsNetwork HardwareHP MSR3024 TAA-compliant AC Router

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter interface view.

interface interface-type

interface-number

N/A

3. Enable DHCP-REQUEST check.

dhcp snooping check

request-message

By default, DHCP-REQUEST

check is disabled.

You can enable DHCP-REQUEST

check only on Layer 2 Ethernet

interfaces.

Configuring DHCP packet rate limit

Perform this task to configure the maximum rate at which an interface can receive DHCP packets. This

feature discards exceeding DHCP packets to prevent attacks that send large numbers of DHCP packets.

To configure DHCP packet rate limit:

Ste

Command

Remarks

1. Enter system view.

system-view N/A

2. Enter interface view.

interface interface-type

interface-number

N/A

3. Configure the maximum rate at

which the interface can receive

DHCP packets.

dhcp snooping rate-limit rate

By default, incoming DHCP

packets are not rate limited.

You can configure this command

only on Layer 2 Ethernet

interfaces.

Displaying and maintaining DHCP snooping

Execute display commands in any view, and reset commands in user view.

Task Command Remarks

Display DHCP snooping entries.

display dhcp snooping binding [ ip

ip-address [ vlan vlan-id ] ]

Available in any

view.

Display Option 82 configuration

information on the DHCP snooping

device.

display dhcp snooping information { all |

interface interface-type interface-number }

Available in any

view.

Display DHCP packet statistics on the

DHCP snooping device

(MSR2000/MSR3000).

display dhcp snooping packet statistics

Available in any

view.

Display DHCP packet statistics on the

DHCP snooping device (MSR4000).

display dhcp snooping packet statistics [ slot

slot-number ]

Available in any

view.

Display information about trusted

ports.

display dhcp snooping trust

Available in any

view.