Advertising Subnets Assigned To Clients; Applying A Dhcpv6 Address Pool To A Vpn Instance - HPE FlexNetwork 10500 Series Configuration Manual

Advertising subnets assigned to clients

This feature enables the route management module to advertise subnets assigned to DHCPv6
clients. This feature achieves symmetric routing for traffic of the same host.
As shown in
The BRAS devices send accounting packets to the RADIUS server. To enable the BRAS devices to
collect correct accounting information for each RADIUS user, configure the DHCPv6 server to
advertise subnets assigned to clients. The upstream and downstream traffic of a RADIUS user will
pass through the same BRAS device.
Figure 73 Network diagram
Host A
Host B
Host C
If the DHCPv6 address pool is applied to a VPN instance, the VPN instance must exist.
To configure the subnet advertisement feature:
Step
1. Enter system view.
2. Create an address pool and
enter its view.
3. Advertise the subnet assigned
to DHCPv6 clients.
Applying a DHCPv6 address pool to a VPN
instance
If a DHCPv6 address pool is applied to a VPN instance, the DHCPv6 server assigns IPv6 addresses
in this address pool to clients in the VPN instance. Addresses in this address pool will not be
assigned to clients on the public network.
The DHCPv6 server can obtain the VPN instance to which a DHCPv6 client belongs from the
following information:
•
The client's VPN information stored in authentication modules.
•
The VPN information of the DHCPv6 server's interface that receives DHCPv6 packets from the
client.
Figure 73, Router A and Router B act as both the DHCPv6 server and the BRAS device.
Layer 2 switch
Router A
DHCPv6 server
BRAS
GE1/0/2
GE1/0/1
1::2/64
GE1/0/2
GE1/0/1
1::3/64
Router B
DHCPv6 server
BRAS
Command
system-view
ipv6 dhcp pool pool-name
network { prefix/prefix-length |
prefix prefix-number
[ sub-prefix/sub-prefix-length ] }
[ preferred-lifetime
preferred-lifetime valid-lifetime
valid-lifetime ] export-route
200
RADIUS server
IP network
Upstream traffic
Downstream traffic
Remarks
N/A
By default, no DHCPv6 address
pools exist.
By default, the subnet assigned
to DHCPv6 clients is not
advertised.