Dell Force10 S25-01-GE-24P Setup and Buffer Tuning of the S25P for Storage Env - Page 5

Managing the Buffer Profile and Setting up Flow Control Buffer profile management, also called buffer tuning or buffer carving, enables you to modify the way your switch allocates buffers from its available memory, and helps prevent packet drops during a temporary burst of traffic. Force10 recommends the following buffer profile configuration for high-performance storage environments, and is valid for both standalone and stacked units of the S-Series. Buffer Profile Management with FTOS 7.8.1.0 FTOS 7.8.1.0 greatly simplifies buffer tuning for use in dedicated storage environments: Step 1 2 3 4 Task Optimize the switch memory buffers for use in dedicated storage environments. Change from CONFIGURATION mode to EXEC privilege mode. Save the configuration to non-volatile memory. Restart the system. Command Syntax buffer-profile global 1Q exit write memory reload Command Mode CONFIGURATION CONFIGURATION EXEC privilege EXEC privilege For buffer tuning details, see the S-Series Debugging and Diagnostics chapters in the S-Series versions of the FTOS Configuration Guide and the FTOS Command Reference. Buffer Profile Management with FTOS 7.7.2.0a The screenshots, below, are from the S-Series and FTOS Release Notes Version 7.7.2.0. They show examples of buffer configurations excerpted from the running configuration of an S-Series switch running FTOS 7.7.2.0a and optimized for a storage environment. The configuration statements can be copied and pasted into the CLI to accomplish generally the same result as provided in the one command, shown above, in FTOS 7.8.1.0. For more on buffer profile management, flow control, and Ethernet Pause Frames, see that Release Notes document and the FTOS Configuration Guide for the S-Series. Figure 1 Buffer Carving for 1Gig Interfaces in a Standalone Unit ! buffer-profile fp eql-fp buffer dedicated queue0 3 queue1 3 queue2 3 queue3 3 queue4 3 queue5 3 queue6 3 queue7 3 buffer dynamic 1257 Force10# 101-00337-00 5