Applying a Shaping Rate to Physical Interfaces Overview
On supported platforms, you can configure physical interfaces to shape traffic based on the rate-limited bandwidth of the total interface bandwidth. This allows you to shape the output of the physical interface, so that the interface transmits less traffic than it is physically capable of carrying.
If you do not configure a shaping rate on the physical interface, the default physical interface bandwidth is based on the channel bandwidth and the time slot allocation.
In general, the physical interface speed is the basis for calculating
the various queue parameters for a physical interface such as delay
buffer size, weighted round- robin (WRR) weight, drop profile, and
so forth. However, when you apply a shaping rate by including the shaping-rate statement, the shaping rate on that physical interface
becomes the basis for calculating all the queue parameters for that
physical interface.
The minimum shaping rate value for the physical interface depends on the platform and line card. The maximum value of shaping rate is limited by the maximum transmission rate of the interface.