HPE FlexNetwork 10500 Series Configuration Manual page 174

•
Public IPv6 address—Includes the address prefix in the RA message and a fixed interface ID
generated based on the MAC address of the interface.
•
Temporary IPv6 address—Includes the address prefix in the RA message and a random
interface ID generated through MD5.
You can also configure the interface to preferentially use the temporary IPv6 address as the source
address of sent packets. When the valid lifetime of the temporary IPv6 address expires, the interface
deletes the address and generates a new one. This feature enables the system to send packets with
different source addresses through the same interface. If the temporary IPv6 address cannot be
used because of a DAD conflict, the public IPv6 address is used.
The preferred lifetime and valid lifetime for a temporary IPv6 address are determined as follows:
•
The preferred lifetime of a temporary IPv6 address takes the smaller of the following values:
The preferred lifetime of the address prefix in the RA message.

The preferred lifetime configured for temporary IPv6 addresses minus DESYNC_FACTOR

(a random number in the range of 0 to 600 seconds).
•
The valid lifetime of a temporary IPv6 address takes the smaller of the following values:
The valid lifetime of the address prefix.

The valid lifetime configured for temporary IPv6 addresses.

To configure the temporary address feature:
Step
1. Enter system view.
2. Enable the temporary IPv6
address feature.
3. Enable the system to
preferentially use the
temporary IPv6 address as
the source address of the
packet.
To generate a temporary address, an interface must be enabled with stateless address
autoconfiguration. Temporary IPv6 addresses do not overwrite public IPv6 addresses, so an
interface can have multiple IPv6 addresses with the same address prefix but different interface IDs.
If an interface fails to generate a public IPv6 address because of a prefix conflict or other reasons, it
does not generate any temporary IPv6 address.
Prefix-specific address autoconfiguration
This task allows you to specify an IPv6 prefix for an interface to automatically generate an IPv6
global unicast address and advertise the prefix. You must specify the IPv6 prefix by its ID.
To specify an IPv6 prefix for an interface to generate an IPv6 address and advertise the prefix:
Step
1. Enter system view.
Command
system-view
ipv6 temporary-address
[ valid-lifetime preferred-lifetime ]
ipv6 prefer temporary-address
Command
system-view
163
Remarks
N/A
By default, the temporary IPv6
address feature is disabled.
By default, the system does
not preferentially use the
temporary IPv6 address as the
source address of the packet.
Remarks
N/A