H3C Technologies H3C SecPath F5020 - Manual (Page 12)

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• Method 3—The client requests prefixes through DHCPv6 and assigns them to downstream hosts.
The hosts then uses the prefixes to generate global IPv6 addresses. This method uses the same
principle of selecting address pools as method 2.
The device can assign a host an IPv6 address in either of the following ways:
• When the host connects to the device directly or through a bridge device, the device can directly
assign the host an IPv6 global unicast address by using method 1 or method 2.
• When the host accesses the device through a router, the device can use method 3 to delegate an
IPv6 prefix to the router. The router assigns the prefix to the host to generate an IPv6 global unicast
address.
IPv6 DNS server address assignment
On IPv6 networks, two methods are available for the IPv6 DNS address assignment:
• AAA authorizes the IPv6 DNS address and assigns this address to the host through RA messages.
• The DHCPv6 client requests an IPv6 DNS address from the DHCPv6 server.
PPP configuration task list
Tasks at a glance
(Required.) Enabling PPP encapsulation on an interface
(Optional.) Configuring PPP authentication
(Optional.) Configuring the polling feature
(Optional.) Configuring PPP negotiation
(Optional.) Enabling PPP accounting
(Optional.) Configuring the nas-port-type attribute
Enabling PPP encapsulation on an interface
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter interface view.
interface interface-type
interface-number
N/A
3. Enable PPP encapsulation
on the interface.
link-protocol ppp
By default, all interfaces except Ethernet
interfaces, VLAN interfaces, and ATM
interfaces use PPP as the link layer protocol.
Configuring PPP authentication
You can configure several authentication modes simultaneously. In LCP negotiation, the authenticator
negotiates with the peer in the sequence of configured authentication modes until the LCP negotiation
succeeds. If the response packet from the peer carries a recommended authentication mode, the
authenticator directly uses the authentication mode if it finds the mode configured.