valid-lifetime (DHCPv6)

Specifies how long the IPv6 prefix remains valid for onlink determination.
Syntax
valid-lifetime interval
Command Default

The valid lifetime interval is 0 seconds by default.

Parameters
interval
Specifies the time interval in seconds. Valid values range from 0 through 4294967295. The default is 0 seconds.
Modes

DHCPv6 server configuration mode

DHCPv6 subnet configuration mode

Usage Guidelines

To use this command, you must upgrade to FI 08.0.90 using the Unified FastIron Image (UFI). Refer to the Software Upgrade and Downgrade chapter in the RUCKUS FastIron Software Upgrade Guide for more information.

The valid lifetime option should only be specified after the preferred life-time is configured. The valid lifetime interval must be greater than or equal to the preferred lifetime interval. Refer to the preferred-lifetime command for more information.

Please confirm updates
When configuring the DHCPv6 server using this command along with the preferred-lifetime (DHCPv6), renewal-time (DHCPv6), and rebind-time (DHCPv6) commands, enter the commands in the following order:

  1. preferred-lifetime (DHCPv6)
  2. valid-lifetime (DHCPv6)
  3. rebind-time (DHCPv6)
  4. renewal-time (DHCPv6)
Note: Failure to enter the commands in the order outlined previously when configuring the DHCPv6 server results in a CLI error.

If a valid lifetime is not configured in DHCPv6 subnet configuration mode, the globally configured valid lifetime is inherited.

The no form of the command restores the default. If the no form of the command is used with an unconfigured value, an error message appears.

Examples

The following example sets the valid lifetime to 100 seconds. 

device# configure terminal
device(config)# ipv6 dhcp6-server enable
device(config-dhcp6)# valid-lifetime 100

The following example sets the valid lifetime to 200 seconds in DHCPv6 subnet configuration mode. 

device# configure terminal
device(config)# ipv6 dhcp6-server enable
device(config-dhcp6)# subnet6 3ffe:501:ffff:100::/64
device(config-dhcpv6-subnet)# valid-lifetime 200
History
Release version Command history
08.0.90 This command was introduced.
Parent topic: Commands Si - Z