Users Guide

lifetime. The default is 86400 seconds (1 day). The infinite setting allows the prefix to be valid for on-link
determination with no time limit.
• lifetime {preferred-lifetime seconds | infinite} — (Optional) Sets
AdvPreferredLifetime in seconds for the prefix in the radvd.conf file. IPv6 addresses generated from
the prefix using stateless autoconfiguration remain preferred for the configured lifetime. The default is 14400
seconds (4 hours). The
infinite setting allows addresses that are autoconfigured using the prefix to be
preferred with no time limit.
Defaults All prefixes in IPv6 subnets configured on an interface advertise.
Command Mode INTERFACE
Usage Information
• By default, all prefixes configured in IPv6 addresses on an interface advertise. To advertise all default
parameters in the subnet prefixes on an interface, enter the default keyword.
• If you configure a prefix with valid or preferred lifetime values, the ipv6 nd prefix default no
autoconfig command does not apply the default prefix values.
• On-link determination is used to forward IPv6 packets to a destination IPv6 address.
Examples
Enable router advertisements
OS10(conf-if-eth1/1/1)# ipv6 address 2001:0db8:2000::1/64
OS10(conf-if-eth1/1/1)# ipv6 nd send-ra
Change default settings for interface subnet prefixes
OS10(conf-if-eth1/1/1)# ipv6 nd prefix default lifetime infinite infinite
Disable advertising an interface subnet prefix
OS10(conf-if-eth1/1/1)# ipv6 nd prefix 2001:0db8:2000::/64 no-advertise
Advertise prefix for which there is no interface address
OS10(conf-if-eth1/1/1)# ipv6 nd prefix 2001:0db8:3000::/64 no-autoconfig
Supported
Releases
10.4.0E(R1) or later
ipv6 nd ra-lifetime
Sets the lifetime of the default router in RA messages.
Syntax
ipv6 nd ra-lifetime seconds
Parameters
• ra-lifetime seconds — Enter a lifetime value in milliseconds, from 0 to 9000 milliseconds.
Defaults Three times the max-ra-interval value
Command Mode INTERFACE
Usage Information The no version of this command restores the default lifetime value. 0 indicates that this router is not used as the
default router.
Example
OS10(config)# interface ethernet 1/2/3
OS10(conf-if-eth1/2/3)# ipv6 nd max-ra-interval 300
Supported
Releases
10.4.0E(R1) or later
ipv6 nd reachable-time
Sets the advertised time the router sees a neighbor to be up after it receives a reachability confirmation.
Syntax
ipv6 nd reachable-time milliseconds
Layer 3 603