Brocade Multi-Service IronWare Routing Configuration Guide (Supporting R05.6.00) - Manual (Page 476)

448 Multi-Service IronWare Routing Configuration Guide
53-1003033-02
Configuring IPv6 neighbor discovery
Configuring the Domain Name of DNS suffix
This section provides information about the IPv6 RA option that allows IPv6 routers to advertise
domain names of DNS suffixes (the DNS name excluding the host) to IPv6 hosts in a local area
network. This option to configure domain names is valid for any network that supports the use of
ND6. The domain names that are advertised by routers are sent through RA messages to IPv6
hosts.
This option is supported only when IPv6 routing is active on the network. The newly configured
domain name can be used as long as the RA router lifetime has not expired.
Configuration considerations
• A maximum of 4 domain names and their corresponding lifetime-multiplier values can be
configured at the global configuration level.
• A maximum of 4 domain names and their corresponding lifetime-multiplier values can be
configured per interface.
• The domain name that is configured on the interface overrides all other domain name
configurations at the system level for this interface.
By default, the domain name of the DNS suffix and the lifetime multiplier information is not
configured. The following examples are used to configure the domain names of a DNS suffix for a
lifetime-multiplier value of 200.
Brocade(config)# ipv6 nd ra-domain-name brocade.com lifetime-multiplier 200
Brocade(config-if-e10000-1/10)# ipv6 nd ra-domain-name brocade.com
lifetime-multiplier 200
Syntax: [no] ipv6 nd ra-domain-name string [lifetime-multiplier decimal]
The string parameter specifies the domain name of the DNS suffix.
The lifetime-multiplier is the percentage value of the maximum router advertisement interval. The
maximum router advertisement interval is the maximum time that can be allowed between sending
unsolicited RA messages for DNS name resolution for a DNS entry. The lifetime-multiplier value is
calculated as twice the RA lifetime. The maximum router advertisement interval percentage range
is 100 through 200%. The default value for maximum router advertisement interval is 200%.
To disable the advertisement of the specified domain name of DNS suffix in the RA message, use
the no form of the respective command.
Configuring the recursive DNS server addresses and lifetime multiplier
This section provides information about the IPv6 RA attribute that allows IPv6 routers to advertise
recursive DNS server addresses and lifetime multiplier values to IPv6 hosts in a local area network.
This option to configure recursive DNS server addresses is valid for any network that supports the
use of neighbor discovery (ND6). The recursive server addresses that are advertised by routers are
sent through RA messages and are used to translate domain names to IP addresses.
This option is supported only when IPv6 routing is active on the network. The newly configured
recursive DNS server address can be used as long as the RA router lifetime has not expired.