R211x-HP Flexfabric 11900 Layer 3 - IP Services Command Reference

83
Views
System view
Predefined user roles
network-admin
mdc-admin
Usage guidelines
DHCP client detects IP address conflict through ARP packets. An attacker can act as the IP address owner
to send an ARP reply, which makes the client unable to use the IP address assigned by the server. HP
recommends that you disable duplicate address detection when ARP attacks exist on the network.
Examples
# Disable the duplicate address.
<Sysname> system-view
[Sysname] undo dhcp client dad enable
dhcp client dscp
Use dhcp client dscp to set the DSCP value for DHCP packets sent by the DHCP client.
Use undo dhcp client dscp to restore the default.
Syntax
dhcp client dscp dscp-value
undo dhcp client dscp
Default
The DSCP value in DHCP packets is 56.
Views
System view
Predefined user roles
network-admin
mdc-admin
Parameters
dscp-value: Sets the DSCP value for DHCP packets, in the range of 0 to 63.
Usage guidelines
The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority
of the packet. A bigger DSCP value represents a higher priority.
Examples
# Set the DSCP value for DHCP packets sent by the DHCP client to 30.
<Sysname> system-view
[Sysname] dhcp client dscp 30