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HP 24-Port 4x Fabric Copper Switch
User Guide
November 2004 (First Edition)
Part Number 377710-001
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© Copyright 2004 Hewlett-Packard Development Company, L.P. Confidential computer software. Valid license from HP required for possession, use or copying. Consistent with FAR 12.211 and 12.212, Commercial Computer Software, Computer Software Documentation, and Technical Data for Commercial Items are licensed to the U.S. Government under vendor’s standard commercial license. The information contained herein is subject to change without notice. The only warranties for HP products and servic
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i Contents Intended Audience ..................................................................................................................................... ix Typographical Conventions....................................................................................................................... ix Contact Information.....................................................................................................................................x 1: Introducing the InfiniBand Sy
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ii Change Default User Name and Password ................................................................................... 18 3: Understanding the Management Options ................ 19 About the CLI ............................................................................................................................................19 Understanding the Command Modes ........................................................................................... 20 Using the CLI...............
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iii Setting the System Clock...........................................................................................................................41 Setting Time.................................................................................................................................. 42 Synchronize the Clock to an NTP Server ..................................................................................... 42 Rebooting the System ...................................................
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iv Change the Response Timeout of a SM........................................................................................ 65 Managing Synchronization Between SMs.................................................................................................66 Enable/Disable Database Synchronization ................................................................................... 66 Set Configurations for the Master SM.......................................................................
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v TopspinOS Upgrades.................................................................................................................... 93 About the System Image............................................................................................................................93 What is a System Image?.............................................................................................................. 93 What is an Image File? ...................................................
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vi Display Entire Log...................................................................................................................... 113 Show Most Recent Log Entries .................................................................................................. 113 Show Details of a Specific Log .................................................................................................. 114 Viewing a Log File Through the GUI........................................................
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vii Adding an SNMP Trap Receivers .............................................................................................. 147 Editing a Current SNMP Trap Receiver ..................................................................................... 148 14: Monitoring Through the CLI ................................. 149 About InfiniBand Events .........................................................................................................................149 About Tracing ........
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ix Preface This document is a guide to the HP 24-Port 4x Fabric Copper Switch. Intended Audience The intended audience is the administrator responsible for installing, configuring, and managing your equipment. This administrator should have experience administering similar networking or storage equipment. Typographical Conventions The following typographic conventions are used in this manual to provide visual clues as to the purpose or application of specific text. • Bold text indicates a c
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x NOTE: Indicates an important point or aspect that you need to consider before continuing. Contact Information Table 2-1: Customer Contact Information For the name of your nearest authorized In the United States, call 1-800-345-1518. HP reseller: In Canada, call 1-800-263-5868. For HP technical support: In the United States and Canada, call 1-800-HP-INVENT (1-800-474-6836). This service is available 24 hours a day, 7 days a week. For continuous quality improvement, calls may be recorded or m
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1 1 Introducing the InfiniBand System This chapter gives an overview of the following: • “About the HP 24-Port 4x Fabric Copper Switch User Guide” on page 1 • “Maximize Server Networks” on page 1 • “What is InfiniBand?” on page 2 • “How Does InfiniBand Work?” on page 2 About the HP 24-Port 4x Fabric Copper Switch User Guide The HP 24-Port 4x Fabric Copper Switch User Guide is specifically intended to demonstrate the processes involved in using and managing the InfiniBand™ switch technology. •
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2 What is InfiniBand? InfiniBand (IB) is a high speed, high density serial interconnect that increases CPU utilization, decreases latency, and eases the management pain of data centers. The term “InfiniBand” refers to the entire hardware, communication, and management infrastructure. Use of this technology increases the communication speed between: •CPUs • devices within servers • subsystems located throughout a network. How Does InfiniBand Work? InfiniBand combines high-speed hardware, sp
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3 devices. This protocol allows InfiniBand hosts to natively send SCSI commands as if the storage was direct attached. The SRP protocol is designed to operate using an RDMA communication service. An RDMA communication service provides communication between pairs of consumers; it uses messages for control information and RDMA operations for data transfers. The SRP protocol is only used if you have a Fibre Channel Gateway installed in your InfiniBand system. uDAPL The user Direct Access Progr
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4 The Queue Pair (QP) is one of the primary architectural elements of InfiniBand. In InfiniBand, communication occurs between Queue Pairs, instead of between ports. A Queue Pair (QP) in an addressable entity, and consists of two Work Queues: 1). Send Work Queue and a 2). Receive Work Queue. (A work queue provides a verb consumer with the ability to queue up a set of instructions that are executed by the Channel Adapter.) The Channel Adapter hardware takes over the task of arbitrating commu
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5 • Local Identifiers (LIDs) • Global Unique Identifier (GUIDs) • Partition Key (P_Keys) • Configures switch forwarding tables. • Receives traps from Subnet Management Agents (SMAs). • Sweeps the subnet, discovering topology changes and managing changes as nodes are added and deleted. Understanding the Subnet Management Agents (SMAs) Subnet Management Agents (SMA) are part of the Subnet Manager. A SMA is provided with each node and process packets from the Subnet Manager. If an Subnet Manager
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6 • Routing internally within a switch (hops between switch chips) • Routing between whole switches (hops between nodes). This is also referred to as routing between “switch elements.” Internal switch routing can be configured to provide the highest performance in passing traffic, and to minimize the threat of congestion within the switch. The Routing Process Overview 1. The Subnet Manager (SM) first discovers all the InfiniBand switch chips in the network. 2. The SM groups the internal switc
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7 Determine the First Path that will be Discovered The SM Routing Algorithm selects the first best path that it finds. If multiple paths with the same properties are available then the first of these paths found is the one that is selected. Therefore, it is possible to setup the cabling between switch elements to force the algorithm to prioritize certain paths. Depending on the network requirements, the prioritized paths can either be concentrated on a particular switch element or spread acr
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