3Com 9000 manual Mechanisms for Preventing Congestion, Preventing congestion Handling congestion

28CHAPTER 1: OVERVIEW

Device Management You can use the CoreBuilder 9000 ATM Enterprise Switch Local Management Application (LMA) or Transcend® Enterprise Manager (or other SNMP-based network management application) to manage your CoreBuilder 9000 ATM Enterprise Switch.

The CoreBuilder 9000 ATM Enterprise Switch LMA is a character-oriented, menu-driven user interface for performing system-level administration. You operate this console from a terminal (or terminal emulation software) or through a remote terminal protocol, such as Telnet or Remote Login.

For more complete network management, use an external SNMP-based application such as Transcend Enterprise Manager. Transcend provides logical views and control for your network. In addition, it extends the SNMP capabilities of the ATM Enterprise Switch with a common user interface and easy-to-use administrative features that optimize network configuration, oversight, and troubleshooting.

Traffic Management Traffic management in the CoreBuilder 9000 ATM Enterprise Switch is done at two levels:

￿Preventing congestion Handling congestion

Mechanisms for Preventing Congestion

The following flow control mechanisms for automatic management in the CoreBuilder 9000 ATM Enterprise Switch Fabric Module work to prevent cell and frame loss under intense loads:

Explicit Forward Congestion Indication (EFCI) Marking

Call Admission Control

Flow Control

CLP bit tagging support

￿Priorities Scheduling