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9
Verify that you are using the correct log in procedure for your initiator. For example: When connecting
using the Adaptec initiator, the log on screen requests the SNC iqn (iSCSI qualified name). If left blank,
Adaptec will not be able to log in. Enter "iSCSI" into this field for auto iqn discovery.
When changing any setting on the SNC the configuration must be saved by using either the
saveConfiguration CLI command or through the SNC Manager interface.
Checking the LAN/WAN
1
Verify that the switch/switches are segmented properly so that hosts and the SNC have access to each
other.
2
If there are routers involved in the setup, make sure the IP addresses and/or MAC addresses of the
SNC are allowed through the router.
3
Verify that the switch can see the SNC 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
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 SNC are using the same port number to communicate iSCSI. The default
port number for the SNC is 3260. Refer to
6
Make sure the host adapter/NIC is configured to log into the SNC. 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 could 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.
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.
SNC 450x User's Guide
get iSCSIPortNumber
on page 70.
47
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