The Need for Bandwidth Management
Since almost all network links are shared by multiple users and applications, the available bandwidth must be shared. Bandwidth management tools enable you to manage how the bandwidth is shared.
If a network link is continuously congested, the link must be upgraded to provide greater capacity. In many cases, however, the average load on a link is within the link capacity, and the link is only congested temporarily. Temporary congestion is sometimes predictable; for example, there are typically peaks in network use at particular time of the day or following a particular event. Other causes of temporary congestion, such as the transferring a large file, are not predictable.
The Solaris Bandwidth Manager software ...