Table of Contents
Advertisement
Command Reference Guide
By default, the valid lifetime advertised for a prefix is 2592000 seconds and the preferred lifetime
advertised is 604800 seconds.
By default, the L flag is set to 1, the R flag is set to 1, and the A flag is set to 1.
Command History
Release 18.1
Functional Notes
This command works for both routers and hosts, but in host implementations it is used to manually add
on-link prefixes that do not have an IPv6 address or to make off-link a prefix generated by an IPv6 address
command. Hosts do not send RA messages, so the command only adds prefixes to RA messages when
the interface is in router mode. This command can also be used to change the defaults used on configured
prefixes when all options are not specified.
Changing the prefix defaults will affect prefixes derived from configured IPv6
addresses, as well as prefixes configured using the ipv6 nd prefix command.
Prefixes advertised can be a subset or a superset of the prefixes derived from the IPv6 addresses
configured on the interface. Prefixes for IPv6 addresses configured on a router interface are automatically
eligible to be advertised on that interface using system or configured default values without having to enter
a prefix command. To impose additional controls on those prefixes, an entry must be made using this
command with the desired settings.
The default parameter is used to change the default settings for the IPv6 prefix parameters. Changing
these settings can be useful when multiple prefixes are implemented that will use the same set of
parameters. When configuring IPv6 prefixes, the prefix default values are only used if no other parameters
are specified after specifying the IPv6 prefix and length (for example, ipv6 nd prefix 2001:DB8::/64). If
additional parameters are specified, any unspecified parameters use the system default values rather than
the configured default values. When the default values are changed, any prefix that uses them will also
change. Using this command to change prefix default values also affects prefixes derived from configured
IPv6 addresses on the interface.
The optional <valid lifetime> parameter specifies the valid lifetime to advertise for this route in each
advertisement. Hosts will reset the lifetime to this value each time the route is advertised, and they will
keep this prefix until the valid lifetime expires.
The optional <preferred lifetime> parameter specifies the preferred lifetime to advertise for this route in
each advertisement. Hosts will reset the lifetime to this value each time the route is advertised, and they
will keep the prefix in the preferred state during this time period. After the preferred time period expires, the
prefix transitions to the deprecated state where it remains until the valid lifetime expires and the route is
removed. The <preferred lifetime> value must be set to be shorter than the <valid lifetime> value.
60000CRG0-35E
Command was introduced.
Copyright © 2012 ADTRAN, Inc.
VLAN Interface Command Set
2772
Advertisement
Table of Contents
