ATTO Technology 2500C Manual De Usuario

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2

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

3

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

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

1

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

2

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

3

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

4

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

5

Verify 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 

6

Make 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.

7

Some 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.

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.

1

A 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. 

2

Verify 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.

3

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

4

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

5

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

6

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

7

Verify 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 

8

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

1

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

2

Some 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. 

3

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

1

Verify 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.

2

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