HP 6125G HP 6125G & 6125G/XG Blade Switches Layer 3 - IP Services Conf - Page 123

Configuring DHCPv6 client, Overview, Configuration prerequisites, Configuration guidelines

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Configuring DHCPv6 client Overview Serving as a DHCPv6 client, the device only supports stateless DHCPv6 configuration, that is, the device can only obtain other network configuration parameters, except the IPv6 address and prefix from the DHCPv6 server. With an IPv6 address obtained through stateless address autoconfiguration, the device automatically enables the stateless DHCPv6 function after it receives an RA message with the M flag set to 0 and the O flag set to 1. Configuring the DHCPv6 client Configuration prerequisites To make the DHCPv6 client successfully obtain configuration parameters through stateless DHCPv6 configuration, make sure that the DHCPv6 server is available. Configuration guidelines • For more information about the ipv6 address auto command, see the Layer 3-IP Services Command Reference. • HP does not recommend enabling the DHCPv6 client and DHCPv6 relay agent on the same interface at the same time. Configuration procedure To configure the DHCPv6 client: Step 1. Enter system view. 2. Enable the IPv6 packet forwarding function. 3. Enter interface view. 4. Enable IPv6 stateless address autoconfiguration. Command system-view ipv6 interface interface-type interface-number ipv6 address auto Setting the DSCP value for DHCPv6 packets An IPv6 packet header contains an 8-bit Traffic class field. This field identifies the service type of IPv6 packets. As defined in RFC 2474, the first six bits set the Differentiated Services Code Point (DSCP) value and the last two bits are reserved. Network devices use the DSCP value as a reference to determine the packet priority for transmission. To set the DSCP value for DHCPv6 packets: 115

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115
Configuring DHCPv6 client
Overview
Serving as a DHCPv6 client, the device only supports stateless DHCPv6 configuration, that is, the device
can only obtain other network configuration parameters, except the IPv6 address and prefix from the
DHCPv6 server.
With an IPv6 address obtained through stateless address autoconfiguration, the device automatically
enables the stateless DHCPv6 function after it receives an RA message with the M flag set to 0 and the
O flag set to 1.
Configuring the DHCPv6 client
Configuration prerequisites
To make the DHCPv6 client successfully obtain configuration parameters through stateless DHCPv6
configuration, make sure that the DHCPv6 server is available.
Configuration guidelines
•
For more information about the
ipv6 address auto
command, see the
Layer 3—IP Services
Command Reference
.
•
HP does not recommend enabling the DHCPv6 client and DHCPv6 relay agent on the same
interface at the same time.
Configuration procedure
To configure the DHCPv6 client:
Step
Command
1.
Enter system view.
system-view
2.
Enable the IPv6 packet forwarding function.
ipv6
3.
Enter interface view.
interface
interface-type interface-number
4.
Enable IPv6 stateless address autoconfiguration.
ipv6 address auto
Setting the DSCP value for DHCPv6 packets
An IPv6 packet header contains an 8-bit Traffic class field. This field identifies the service type of IPv6
packets. As defined in RFC 2474, the first six bits set the Differentiated Services Code Point (DSCP) value
and the last two bits are reserved. Network devices use the DSCP value as a reference to determine the
packet priority for transmission.
To set the DSCP value for DHCPv6 packets: