ATTO Technology 2700C - Manual (Page 28)

23
ATTO Technology Inc. iPBridge Installation and Operation Manual
5 Verify that each used Ethernet port on the
iPBridge can be pinged from the desired host.
Refer to
Ping on page x of the Appendix.
If the host cannot ping the iPBridge ports and
the iPBridge ports are properly configured,
continue to the Local Area Network/Wide Area
Network section,
Check the LAN/WAN on page
23.
Verify that each port on the iPBridge can ping
each desired host. Refer to
Ping on page x of
the Appendix. If the iPBridge cannot ping the
host, continue to
Check the LAN/WAN on page
23.
6 If using DHCP (the default), verify that the
DHCP server is assigning the correct IP
information to the host.
7 Verify VLAN IDs are either disabled or are set
up identically on the iPBridge and the
connecting switch.
8 Some older switches/hosts cannot auto
negotiate between the iPBridge and the
switch/host at the desired speed. You may
have to force the host/switch or the iPBridge to
the desired speed.
9 Verify that the host is logging into the iPBridge
correctly by viewing the Connections page
and determining if there a “session open”
status.
10 Verify that you are using the correct login
procedure for your initiator. For example: When
connecting using the Adaptec initiator, the log
on screen requests the iPBridge 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 iPBridge, the
configuration must be saved by clicking on the
Save button on the ATTO ExpressNAV interface
screen or using the saveConfiguration CLI
command.
Check the LAN/WAN
1 Verify that the switch/switches are segmented
properly so that hosts and the iPBridge 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 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.
Check 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 iPBridge Ethernet
port in use are using the same port number to
communicate iSCSI. Check the ATTO
ExpressNAV iSCSI page. The default port
number for all ports on the iPBridge is 3260.
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
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.
Check the iSCSI OS driver
If the host uses 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