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ipv6 dhcp server database update interval interval
By default, the DHCP server waits 300 seconds to update the backup file after a DHCP binding
change. If no DHCP binding changes, the backup file is not updated.
5. (Optional.) Terminate the download of DHCPv6 bindings from the backup file.
ipv6 dhcp server database update stop
This command only triggers one termination.
Enabling the DHCPv6 server to advertise IPv6
prefixes
About IPv6 prefixes advertisement
A DHCPv6 client can obtain an IPv6 prefix through DHCPv6 and use this IPv6 prefix to assign IPv6
addresses for clients in a downstream network. If the IPv6 prefix is in a different subnet than the IPv6
address of the DHCPv6 client's upstream interface, the clients in the downstream network cannot
access the external network. If the DHCPv6 server is on the same link as the DHCPv6 client, enable
the DHCPv6 server to advertise the IPv6 prefix.
Procedure
1. Enter system view.
system-view
2. Enable the DHCPv6 server to advertise IPv6 prefixes.
ipv6 dhcp advertise pd-route
By default, the DHCPv6 server does not advertise IPv6 prefixes.
Enabling DHCPv6 logging on the DHCPv6 server
About DHCPv6 server logging
The DHCPv6 logging feature enables the DHCPv6 server to generate DHCPv6 logs and send them
to the information center. The information helps administrators locate and solve problems. For
information about the log destination and output rule configuration in the information center, see
Network Management and Monitoring Configuration Guide.
Restrictions and guidelines
As a best practice, disable this feature if the log generation affects the device performance or
reduces the address and prefix allocation efficiency. For example, this situation might occur when a
large number of clients frequently come online or go offline.
Procedure
1. Enter system view.
system-view
2. Enable DHCPv6 logging.
ipv6 dhcp log enable
By default, DHCPv6 logging is disabled.
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