User Manual

Chapter 3 - Operation and Administration of the Macro BTS NPU Configuration
4Motion 174 System Manual
3.4.7.2 Rate Limiting for the NPU
The rate limiting feature enables limiting the type and rate of traffic destined
towards the NPU. This feature is used to protect the NPU from hostile applications
or Denial of Service (DoS) attacks because packets that exceed an allowed rate are
dropped and not queued to the NPU.
The default rate limits that are preconfigured in the device provide all the functionality necessary for
proper operation of the system.
You can at any time:
 Enable or disable rate limiting (refer to Section 3.4.7.2.1).
 Display configuration information for the rate limiting feature (refer to
Section 3.4.7.2.2).
3.4.7.2.1 Enabling/Disabling the Rate Limiting for the NPU
You can disable or enable the rate limiting feature for the NPU. When this feature
is disabled, rate-limiting for all applications is in the "not-in-service" state. When
you enable this feature, the last saved configuration parameters for all
applications (pre-defined, user-defined, and all others) is used.
By default, this feature is enabled for the NPU.
Command
Syntax
npu# show resource limits
Privilege
Level
1
Display
Format
Resource softlimit hardlimit
CPU <limit> <limit>
Memory <limit> <limit>
Command
Modes
Global configuration mode