Features of the IBP Module, Head of Line Blocking

Features of the

Introduction

2 Introduction

The PRIMERGY BX600 Blade Server system is a modular server system that can integrates up to 10 server modules, four IBP Modules (one IBP will be included in the base enclosure, the other three are optional) and two Management Modules (MMB). The IBP Module provides networking connectivity to PRIMERGY BX600 Blade Server. The Management Modules provides a single point of control for the PRIMERGY BX600 Blade Server.

The PRIMERGY BX600 Intellignent Blade Panel (IBP) Modules are 42-port devices that are connected to servers through the mid-plane connectors located on PRIMERGY BX600 Blade Server middle plane. The device has 42 ports. The ports numeration starts from the internal ports g1-g30 connected to server blades, and ports g31-g42 are the external ports connecting the IBP Module to the network through the internal ports.

•12 external RJ-45 connectors for 10/100/1000 Base-T copper ports (uplinks).

•30 internal ports connected to servers through PRIMERGY BX600 Blade Server mid-plane connector of a VHDM type.

The terminal connection to the device is provided through the MMB board only. No access point is provided on the IBP Module front panel. For debugging and management purposes, a UART bus of each IBP Module is connected to the MMB board. The MMB board can select for management only one IBP at a time.

The IBP Module receives a power supply (12 V dc) through the mid-plane connector. A four system LED indicates the IBP Module status (Power module,MMB-selected or not).

The following figure illustrates the PRIMERGY BX600:

Figure 1-1. PRIMERGY BX600 IBP Module Front Panel

2.1 Features of the IBP Module

The IBP provides a wide range of advanced performance-enhancing features. Multicast filtering provides support for real-time network applications. Flow control eliminates the loss of packets due to bottlenecks caused by port saturation. And broadcast storm suppression prevents broadcast traffic storms from engulfing the network. Some of the management features are briefly described below.

Head of Line Blocking

Head of Line (HOL) blocking results in traffic delays and frame loss caused by traffic competing for the same egress port resources. HOL blocking queues packets, and the packets at the head of the queue are forwarded before packets at the end of the queue.

12	Intelligent Blade Panel Module