user manual

Default Aggregation 131
Selecting the Default Aggregation Action
The default aggregation action is the method of aggregation applied to
network devices which have a DNS name, but which are not contained
within one of the local DNS domains.
There are three default aggregation actions, from which you can select
and apply one to non-local DNS domains. In the following examples, it is
assumed that acme.com is not in the Local Domain Specification.
■ Automatic This describes the “standard” default aggregation action.
Traffix Manager builds up a tree of DNS domains for aggregation
purposes.
When aggregation becomes necessary, all devices in each of the
lowest DNS domains will be aggregated into a single device, to
represent each domain. For example, all devices in the domain
engineering.acme.com are aggregated into a single device,
representing
engineering.acme.com.
When all domains at this lowest level have been aggregated, Traffix
Manager then aggregates each domain at the next level. Following
this example,
engineering.acme.com and office.acme.com
are both aggregated to
acme.com.
You cannot undo aggregation. If you add an aggregated DNS domain to
a local domain, all newly discovered addresses will be mapped to the
(aggregated) representative device.
The two default aggregation actions described below provide you
with control over how devices are aggregated. However, if the
maximum device limit is reached and the default action is not
automatic, automatic aggregation is attempted, to make room for
new local devices.
■ Aggregate at DNS Layer By selecting this option you specify a DNS
layer and a direction. This direction can be either From name, or From
tail.
■ Aggregate from name allows you to specify any layer above the
name of the device.
If layer 1 above the name is selected, the device
office.acme.com is aggregated into the device representing
the DNS domain acme.com.