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Two-Color Policers and Shaping Rate Changes
When you configure a change in shaping rate, it is important to consider the effect on the bandwidth limit. Whenever the shaping rate changes, the bandwidth limit is adjusted based on whether a logical interface (unit) or bandwidth percentage policer is configured.
When a logical interface bandwidth policer is configured, the order of priority for the shaping rate (if configured at that level) is:
- The shaping rate applied to the logical interface (unit).
- The shaping rate applied to the physical interface (port).
- The physical interface speed.
When a bandwidth percentage policer is configured, the order of priority for the shaping rate (if configured at that level) is:
- The shaping rate applied to the physical interface (port).
- The physical interface speed.
These guidelines must be kept in mind when calculating the logical link speed and link speed from the configured shaping rate, which determines the rate-limited bandwidth after the policer is applied.
