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e. Marks the session state as online.
If the authentication fails, the BRAS marks the session as failure and discards the
DHCP-DISCOVER message.
12. The DHCP client obtains configuration information from the DHCP-ACK message.
13. The BRAS sends the AAA server a message to start accounting.
Access procedure for IPv6-ND-RS users
This example uses a Layer 2 device as the BRAS.
Figure 143 Access procedure for IPv6-ND-RS users
1.
The host sends an IPv6 ND RS packet to the BRAS.
2.
The BRAS initiates an IPoE session and sends the AAA server an access request that contains
user information, such as the source MAC address.
3.
The AAA server returns an access accept that contains authorization information to the BRAS if
the authentication succeeds. If the authentication fails, the AAA server returns a reject
message.
4.
The BRAS performs the following:
a. Generates an IPv6 address based on the host's MAC address and the IPv6 prefix.
b. Updates the IPoE session information.
c. Marks the session as success.
If the authentication fails, the BRAS marks the session as failure and discards the IPv6 ND RS
packet.
5.
The BRAS assigns a user profile and sends the host an IPv6 ND RA packet containing the IPv6
prefix.
6.
The host generates an IPv6 address based on the received IPv6 prefix.
7.
The BRAS sends the AAA server a message to start the service accounting.
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Troubleshooting
