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.
Check 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.
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.
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.
Check 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.
Check 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.
Performance issues
If the host is not getting the performance it should, check the following items.
Check SCSI devices
1Verify that the devices are running at their highest possible SCSI speed.
Mixing SE and LVD devices on the same SCSI bus forces the speed of the bus to SE, thus slowing faster LVD devices. The iPBridge cannot accelerate an already slow device. Refer to Connecting SCSI devices to the SCSI port on page ii of the Appendix.
2Verify that the proper terminator is being used. An SE terminator forces the SCSI bus to SE speeds.
Check the iPBridge SCSI port
1Verify that the SCSI port configuration is set to the highest speed using the ExpressNAV interface, SCSI page.
The iPBridge SCSI port speed, wide negotiation, and sync negotiation settings all affect the speed of the port. By default, these settings are set for optimal speed.
Check the iPBridge Ethernet port
1Verify that the data port is set to auto negotiate or forced to 1000 Mb.
2Verify that the MTU size is set to optimal setting for the LAN/WAN environment.
The current optimized frame size for the iPBridge is 9k.
Check the LAN/WAN
1Verify that the MTU size is set to optimal setting for the LAN/WAN environment.
9k frame size is the current optimized frame size for the iPBridge. Many switch and router vendors do not support the larger frame size of 9k or 16k.
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