ATTO Technology 2500C operation manual Ethernet connections

Page 71

devices from both SCSI busses to increase overall performance.

Each SCSI bus auto-negotiates the appropriate sync rates with the connected devices. If slower devices are mixed with faster devices, the bus communicates at the rate of the slowest device, thus wasting the performance capabilities of the faster devices. Connect slower devices to one SCSI port and connect faster devices to the other port.

The iPBridge supports a wide variety of SCSI storage devices including stand-alone drives, removable drives, JBODs, RAIDs, tape, CD and DVD drives, changers and libraries.

1Connect the cable from the SCSI device to a VHDCI SCSI port on the iPBridge.

2Check the type of cable, cable length limit and number of devices recommended for the port. See Exhibit 0.0-1.

Keep cable lengths as short as possible to ensure the highest signal quality and performance. These cable lengths include the wiring inside the devices.

3Set the IDs of the SCSI devices connected to the bridge to a value other than 7.

Use a sequential ID starting at 0 for each device. The SCSI port in the ATTO iPBridge has an internal factory setting ID of 7, typical for a SCSI initiator device.

Note

The entire SCSI bus operates at the speed of the slowest device on that bus. If you wish to mix devices of different SCSI speeds, place the devices on separate busses. That is, put the slower devices on iPBridge 2500 SCSI bus 0, and the faster devices on iPBridge 2500 SCSI bus 1. Each bus is independent so each can operate at different speeds.

4Terminate the SCSI bus after the last device. The iPBridge is terminated internally.

Ethernet connections

Use at least Cat 5e cable to connect the Ethernet ports to your network.

Note

For best performance, all cabling, network interface cards (NICs), host bus adapters (HBAs), and network switches must be Gigabit Ethernet (GbE), and at least Cat 5e certified. Most standard offices use 2-pair wiring which is not compatible. GbE requires 4-pair wiring.

For best performance, support for 9014 byte jumbo frames should be available for all switches and host iSCSI equipment.

Before you begin installing the iPBridge Ethernet ports, be sure to check or complete the following:

•If you are managing your iSCSI system across a WAN and your system uses a firewall, be sure that the following ports are open and available: If you are using the TCP protocol

•telnet (port 23)

•http (port 80)

•ftp (ports 20 and 21)

•iSCSI (port 3260)

•iSNS (port 3705)

If you are using the UDP protocol

•ntp (port 123)

•Be sure your host system(s) is set up and configured.

•Your host system can use any of three different types of cards: a network interface card (NIC), a telnet offload engine card (TOE), or a storage network interface card (SNIC).

•The ATTO driver file from the CD included with your iPBridge or from the ATTO website, www.attotech.com, is installed on your host.

•The switch has been configured to forward UDP broadcast messages.

•The minimum requirement for Windows-based browsers is Internet Explorer 5.5 or Netscape Navigator 6.2. The minimum requirement for Macintosh browsers is Internet Explorer 5.2 or Safari 1.2.

•Ethernet speed defaults to auto; the iPBridge determines the speed and set other parameters based on the speed.

iv Appendix

Page 70 Page 72
Image 71
Page 70 Page 72
Contents Atto iPBridgeTM 2500C/R/D Page Page Contents Atto ExpressNAV interface Additional configurationsCopying iPBridge configurations TroubleshootingAlternative interface options Maintenance commandsDiagnostic commands Ethernet commands Scsi configuration commandsSerial port configuration commands Appendix a Atto iPBridge, FibreBridge family Ndmp commandsISCSI commands Mapping commandsPage Intelligent Bridging Architecture, the engine IPBridge2500 featuresIPBridge 2500 provide storage options Connectivity, infrastructure solutions Possible storage ConfigurationsAtto iPBridge 2500R/D Serial interface Installation instructionsLED indicators Exhibit 1.1-1 Atto iPBridge 2500R/D connector sideBack connector side Height of tallest component .535 inches Operating Temperature 0-70C externalAtto iPBridge 2500C Exhibit 1.2-1 Atto iPBridge 2500C faceplate Exhibit 1.2-2 Atto iPBridge 2500C board layout Microsoft iSCSI Initiator changes Configuring the iPBridgeClick Launch Browser Getting an IP addressHow Ndmp works Ndmp configuration provides backupAssign Ndmp names to devices Setting up NdmpProcedure Click AutoMap Mapping devices NdmpMap devices automatically Map devices manuallyConfiguration mapping Ndmp Node names Single Target modeMapping devices iSCSI Click on the Multi Target Mode enabled button Click Submit Multiple Target modeAutomatically configure Multiple Target mode Manually configure Multiple Target modeExhibit 2.4-1 Examples of single and multiple target modes Mapping single vs. multi target modeExhibit 2.4-2 Mapping with Atto ExpressNAV Set the Real Time Clock Additional configurationsChange the current user name, password Create a read only password or user nameSnmp protocol Configuring Scsi devicesTo optimize ExpressNAV in Internet Explorer Accessing ExpressNAVAtto ExpressNAV interface Browser compatibilityExhibit 3.0-1 An ExpressNAV ExpressNAV pages Help FirmwareRestart Preliminary steps Using Atto ExpressNAVUsing FTP over GbE Updating firmwareSend File/ZModem send Copying iPBridge configurationsUsing ZModem over the serial port ZModem send clone.clnCheck the iPBridge event and trace logs TroubleshootingInside out method Check the host event logChecking Scsi devices Check for problems on attached devicesCheck host versions Component checkChecking the LAN/WAN Checking the iPBridge internal configurationChecking the serial port Checking iPBridge Ethernet portsChecking the applications Checking the iSCSI Host Adapter or NICChecking the iSCSI OS driver Checking the Operating SystemChecking Ethernet Host Adapter or NIC Performance issuesChecking iPBridge Scsi ports Checking the host system Type iPBridge in the New Connection dialog box Alternative interface optionsUse the serial port or header Use TelnetAtto Exhibit 7.0-1 Start up messagesCLI provides ASCII-based interface Command conventions Symbol IndicatesCommand Defaults Example CLI commands summarySntp 38 CLI General use commands VerboseMode UsernameMaintenance commands Time SpeedWriteDefaultSNTPServer SpeedWriteDiagnostic commands EventLogFilter DumpEventLogDumpTraceLog EventLogSCSITargets PingRouteDisplay SCSIPortListTailEventLog TemperatureSNMPTrapAddress SNMPTrapsScsi configuration commands VirtualDriveResponse Performance enhancement to newly-mapped Scsi devicesSerialPortEcho Serial port configuration commandsSerialPortBaudRate 50 CLI Ethernet commands 52 CLI NDMPPortNumber Ndmp commandsNDMPAuthType NDMPMaxVersion54 CLI ISCSI commands MultiTargetMode ISNSLoginControlISNSServer Route Mapping commandsAutoMap List to the map which satisfies a search for the given LUN IPBridge products Product features 2500C/R/D 2700C/R/D 1500E/D 1550E/DAppendix a Atto iPBridge, FibreBridge family Fibre Bridge products Examples Appendix B CablingScsi cabling Cable typesEthernet connections Term Definition Appendix C GlossaryVi Appendix FCC Standards Radio and Television Interference Appendix D Safety standards and compliancesEuropean Standards Appendix E Atto accessories Contact Atto Technology, Inc Appendix F Warranty, contact information
Top Page Image Contents