Specifying Dhcpv6 Servers For A Dhcpv6 Address Pool On The Dhcpv6 Relay Agent - H3C SR8800-F Configuration Manual

To specify a DHCPv6 server on a relay agent:
Step
1. Enter system view.
2. Enter interface view.
3. Specify a DHCPv6 server.
Specifying DHCPv6 servers for a DHCPv6 address pool on
the DHCPv6 relay agent
About DHCPv6 servers for a DHCPv6 address pool on the DHCPv6 relay agent
This feature allows DHCPv6 clients of the same type to obtain IPv6 addresses, IPv6 prefixes, and
other configuration parameters from the DHCPv6 servers in the matching DHCPv6 address pool.
It applies to scenarios where the DHCPv6 relay agent connects to clients of the same access type
but classified into different types by their locations. In this case, the relay interface typically has no
IPv6 address configured. Typical scenario is the IPoE access. You can use the gateway-list
command to specify the gateway addresses for clients matching the same DHCPv6 address pool.
Upon receiving a DHCPv6 Solicit or Request from a client that matches a DHCPv6 address pool, the
relay agent processes the packet as follows:
•
Fills the link-address field of the packet with a specified gateway address.
•
Forwards the packet to all DHCPv6 servers in the matching DHCPv6 address pool.
The DHCPv6 servers select a DHCPv6 address pool according to the gateway address.
Restrictions and guidelines
When you configure this feature, follow these restrictions and guidelines:
•
If this feature is used in the PPPoE scenario, execute the ipv6 dhcp relay client-information
record command to enable the DHCPv6 relay agent to record relay entries. When a PPPoE
user gets offline, the DHCPv6 relay agent locates the matching relay entry and sends a
Release message to the DHCPv6 server.
•
If this feature is used in the PPPoE scenario, you do not need to execute the ipv6 dhcp select
relay command. This is because the remote-server command is a must in this configuration
task and it implies that this device is a relay device.
Procedure
To specify DHCPv6 servers for a DHCPv6 address pool on the DHCPv6 relay agent:
Step
1. Enter system view.
2. Create a DHCPv6 address
pool and enter its view.
Command
system-view
interface interface-type
interface-number
ipv6 dhcp relay server-address
ipv6-address [ interface
interface-type interface-number ]
Command
system-view
ipv6 dhcp pool pool-name
197
Remarks
N/A
N/A
By default, no DHCPv6 server is
specified.
If a DHCPv6 server address is a
link-local address or multicast
address, you must specify an
outgoing interface by using the
interface keyword in this command.
Otherwise, DHCPv6 packets might
fail to reach the DHCPv6 server.
Remarks
N/A
By default, no DHCPv6 address pools
exist.