Reference Guide

● no-autoconfig — (Optional) Sets AdvAutonomous to Off for the specified prefix in the
radvd.conf file. This setting tells hosts to not use this prefix for address autoconfiguration. By default,
AdvAutonomous is On.
● no-rtr-address — (Optional) Sets AdvRouterAddr to Off for the prefix in the radvd.conf file.
The Off setting tells hosts to not use the advertising router's address for on-link determination. By
default, AdvRouterAddr is On.
● off-link — (Optional) Sets AdvOnLink to Off for the prefix in the radvd.conf file. The Off
setting tells hosts to not use this prefix for on-link determination. By default, AdvOnLink is On.
● lifetime {valid-lifetime seconds | infinite} — (Optional) Sets
AdvValidLifetime (in seconds) for the prefix in the radvd.conf file. The prefix is valid for on-link
determination only for the specified 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 are advertised.
Command Mode INTERFACE
Usage
Information
● By default, all prefixes configured in IPv6 addresses on an interface are advertised. 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 (0 to 9000 milliseconds).
Defaults 3 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.
358 Layer 3