OS10 Enterprise Edition User Guide Release 10.4.0E(R3)

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ipv6 nd prefix

Configures the IPv6 prefixes that are included in Router Advertisement (RA) messages to neighboring IPv6 routers.

Syntax
ipv6 nd prefix { ipv6-prefix | default} [no-advertise] [no autoconfig] [no-rtr-address] [off-link] [lifetime {valid-lifetime seconds | infinite} {preferred-lifetime seconds | infinite}]
Parameters
  • ipv6-prefix — Enter an IPv6 prefix in x:x::y/mask format to include the prefix in RA mesages. Include prefixes that are not already in the subnets configured on the interface.
  • default — Configure the prefix parameters advertised in all subnets configured on the interface.
  • no-advertise — (Optional) Do not advertise the specified prefix. By default, all prefixes in configured subnets are advertised.
  • 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

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