Technical data

28 Extended CP Limit
217316-A Rev 00
To reset the passwords, enter the following command at the boot monitor prompt:
reset-passwd
To change the passwords, enter the following commands:
config cli password <access-level> <username>
Enter the old password:
Enter the new password:
Re-enter the new password:
Extended CP Limit
The CP Limit function protects the CPU by shutting down any ports that send
traffic to the CPU at a rate greater than desired through one or more ports. The
Extended CP Limit functionality is configurable and can be used to protect the
switch from being overwhelmed by any kind of traffic. To make use of the
Extended CP Limit functionality, configuration must take place at the chassis and
port level.
The set of ports to check for a high rate of traffic must be predetermined, and
configured as either SoftDown or HardDown.
• HardDown ports are disabled immediately once the CPU is congested for a
certain period of time.
• SoftDown ports are monitored for a specified time interval, and are only
disabled if the traffic does not subside. The maximum number of SoftDown
ports to be monitored at one time is configured by the user.
Note: All passwords are case-sensitive.
Note: The Extended CP-limit features differs from the rate-limit feature
by monitoring only packets that are sent to the CPU (control plane),
instead of all packets that are forwarded through the switch (data plane).