Recognizing Performance Issues

When the ACL is the root of a performance problem, it shows as the Slow Path becoming overused. The Slow Path is not designed to handle significant traffic levels since the single CPU also handles all other management functions. There are several ways to determine if the CPU is overloaded:

• Continuous PING to the supervisor: timeouts or inconsistent timing of echo responses.
• Slow Scrolling LED Marquee: This is good visual sign that the CPU is busy.
• Slow Management response: If Avaya Multiservice Network Manager (MSNM), Avaya Policy Manager (APM), HPOV, or a MIB browser get slow updates, this can signify a busy CPU or saturated network.
• Slow network response: This can be measured in a variety of ways.

Once you have determined that the ACL is the root cause, and have optimized the rules, you need to tune system parameters.