ATTO Technology 2500C Checking the iSCSI Host Adapter or NIC, Checking the iSCSI OS driver

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2If there are routers involved in the setup, make sure the IP addresses and/or MAC addresses of the iPBridge are allowed through the router.

3Verify that the switch can see the iPBridge on the port(s) in question. Refer to your switch vendor’s guide for more information.

Checking the iSCSI Host Adapter or NIC

iSCSI host adapters appear as a type of Storage Controller to the host OS, not as a standard NIC. These adapters usually have hardware acceleration to offload the TCP processing from the host. Configuration of these adapters is usually done through the vendor’s own utility and not through the OS itself.

NICs come in two types: accelerated and un- accelerated. Accelerated NICs use some hardware to offload some of the TCP processing from the host. Un- accelerated NICs make the OS do all TCP processing.

To check the iSCSI host adapter or NIC

1Check cable integrity. Check the cables for solid connections. Make sure they are plugged in properly. Inspect cable ends for broken clips and improper wiring.

2Verify that the iSCSI host adapter or NIC is configured with the correct IP information.

3If using DHCP, verify that the DHCP server is assigning the correct IP information to the host.

4Verify that the hosts are running the recommended driver and firmware level for the iSCSI host adapter or NIC vendor.

5Verify that the hosts and the iPBridge are using the same port number to communicate via iSCSI. The default port number for the iPBridge is 3260. Refer to iSCSIPortNumber on page 55.

6Make sure the host adapter/NIC is configured to log into the iPBridge. Some iSCSI host adapters do not re-login upon reboot or unplug/replug event without marking a check box.

7Some older switches cannot autonegotiate between the host and the switch properly. You may have to force the host or switch to the desired speed.

For a NIC using an OS iSCSI driver, continue to the iSCSI OS driver section.

Checking the iSCSI OS driver

This section is for hosts using a driver that allows the OS to talk to iSCSI targets via a NIC, not an iSCSI storage adapter.

1A PC using an iSCSI storage adapter and an iSCSI OS driver might not work correctly on the same machine. Check with the vendors to make sure they are compatible.

2Verify that the PC has the latest iSCSI driver as well as the required service packs and patches. Check with the iSCSI OS driver vendor for more information.

3Verify that the iSCSI OS driver has started. Look under Device Manager for Windows or lsmod for Linux.

4Verify that the iSCSI OS is still looking for the iPBridge at the right IP address.

5If using DHCP, verify that the DHCP server is assigning the correct IP information to the host. Refer to Ethernet Port Configuration on page 23.

6Verify that the NIC is configured with the correct IP information.

7Verify that the hosts and the iPBridge are using the same port number to communicate via iSCSI. The default port number for the iPBridge is 3260. Refer to iSCSIPortNumber on page 55.

8Check cable integrity. Check the cables for solid connections. Make sure they are plugged in properly. Inspect cable ends for broken clips and improper wiring.

Checking the Operating System

1Verify that the OS has the required service packs or patches installed. If not, obtain the proper service packs and patches and install them.

2Some iSCSI host adapters and iSCSI OS drivers do not always automatically find new targets when plugged in or when forced to rescan. Reboot the hosts.

3Check if the vendor has a new driver. If so, install it.

Checking the applications

1Verify that the application is running the latest device drivers for the devices connected to iPBridge. If not, get the latest device drivers and install them.

2Verify with the application vendor if the iSCSI technology is supported on the version of the application being used.

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Contents Atto iPBridgeTM 2500C/R/D Page Page Contents Atto ExpressNAV interface Additional configurationsCopying iPBridge configurations TroubleshootingMaintenance commands Diagnostic commandsAlternative interface options Scsi configuration commands Serial port configuration commandsEthernet commands Appendix a Atto iPBridge, FibreBridge family Ndmp commandsISCSI commands Mapping commandsPage IPBridge2500 features IPBridge 2500 provide storage optionsIntelligent Bridging Architecture, the engine 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 Operating Temperature 0-70C external Atto iPBridge 2500CHeight of tallest component .535 inches 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 backupSetting up Ndmp ProcedureAssign Ndmp names to devices Click AutoMap Mapping devices NdmpMap devices automatically Map devices manuallyConfiguration mapping Ndmp Single Target mode Mapping devices iSCSINode names 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 Firmware RestartHelp 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 SystemPerformance issues Checking iPBridge Scsi portsChecking Ethernet Host Adapter or NIC 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 devicesSerial port configuration commands SerialPortBaudRateSerialPortEcho 50 CLI Ethernet commands 52 CLI NDMPPortNumber Ndmp commandsNDMPAuthType NDMPMaxVersion54 CLI ISCSI commands ISNSLoginControl ISNSServerMultiTargetMode Mapping commands AutoMapRoute List to the map which satisfies a search for the given LUN Product features 2500C/R/D 2700C/R/D 1500E/D 1550E/D Appendix a Atto iPBridge, FibreBridge familyIPBridge products 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
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