Configurations to use IPv6 networks
The following Preferred network configurations instruct NetBackup to use only IPv6 addresses as targets in outbound calls for the currently selected hosts. The configurations satisfy a topology where all backup traffic uses an IPv6 network and other traffic uses other networks.
One configuration uses the Prohibited directive (Figure: Prohibit IPv4 addresses as targets) and one configuration uses the Match directive (Figure: Match IPv6 addresses as targets).
The more efficient method to specify one address family, (IPv6, in this case), is to prohibit IPv4. The behavior of the Match directive is not as exclusive as Prohibited. In this case, Match may not necessarily exclude other address families.
Figure: Prohibit IPv4 addresses as targets uses the Prohibited directive with a wildcard to indicate to NetBackup to not consider using any IPv4 addresses. In this situation, NetBackup must use an IPv6 address.
Note:
The default configuration is for NetBackup to use only IPv4 addresses.
If you have not previously changed the option to Both IPv4 and IPv6 or IPv6 only, creating a directive that prohibits all IPv4 addresses renders the server mute.
Figure: Match IPv6 addresses as targets uses the Match directive with a wildcard to indicate to NetBackup to prefer IPv6 addresses. In this case, NetBackup tries to use an IPv6 address, but may consider IPv4 addresses if necessary.
Figure: Indicating a range of IPv6 networks shows another configuration that allows NetBackup to choose from multiple IPv6 networks.
Given the multihomed example configuration, the directive indicates the following:
Four IPv6 networks, from fec0:0:0:fe04 through fec0:0:0:fe07, are described as targets.
For all addresses in these networks, a source binding address that is derived from the IP addresses of host name host_fred is used.
See How NetBackup uses the directives to determine which network to use.
