Connectivity Guide

• no-rtr-address — (Optional) Sets AdvRouterAddr to Off for the prex in the radvd.conf le. 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 prex in the radvd.conf le. The Off setting tells
hosts to not use this prex for on-link determination. By default, AdvOnLink is On.
• lifetime {valid-lifetime seconds | infinite} — (Optional) Sets AdvValidLifetime in
seconds for the prex in the radvd.conf le. The prex is valid for on-link determination only for the specied
lifetime. The default is 86400 seconds (1 day). The infinite setting allows the prex to be valid for on-link
determination with no time limit.
• lifetime {preferred-lifetime seconds | infinite} — (Optional) Sets
AdvPreferredLifetime in seconds for the prex in the radvd.conf le. IPv6 addresses generated from the
prex using stateless autoconguration remain preferred for the congured lifetime. The default is 14400
seconds (4 hours). The infinite setting allows addresses that are autocongured using the prex to be
preferred with no time limit.
Defaults All prexes in IPv6 subnets congured on an interface advertise.
Command Mode INTERFACE
Usage Information
• By default, all prexes congured in IPv6 addresses on an interface advertise. To advertise all default
parameters in the subnet prexes on an interface, enter the default keyword.
• If you congure a prex with valid or preferred lifetime values, the ipv6 nd prefix default no
autoconfig
command does not apply the default prex 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 prexes
OS10(conf-if-eth1/1/1)# ipv6 nd prefix default lifetime infinite infinite
Disable advertising an interface subnet prex
OS10(conf-if-eth1/1/1)# ipv6 nd prefix 2001:0db8:2000::/64 no-advertise
Advertise prex 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.
408 Layer 3