ATTO Technology 1550D - Manual (Page 23)

19
ATTO Technology Inc. iPBridge Installation and Operation Manual
Check the iPBridge Ethernet/iSCSI port
1 Check Ethernet cable integrity. Check the
cables for solid connections. Cat5 cable can
cause connection issues with Gigabit Ethernet.
Cat6 cable is the best cabling for the iPBridge.
2 Verify the IP address, subnet mask, and
gateway are properly set on each data port on
the iPBridge for your network environment.
Refer to
Installation on page 5.
3 Verify that the Ethernet speed is set to auto:
invoke the get EthernetSpeed all command,
check the Ethernet page of the ATTO
ExpressNAV interface, or check the LED link
lights to determine if the Ethernet speed is
correct.
4 Determine if the iPBridge is set to get its IP
information from a DHCP server. If so, verify
that the DHCP server has available IP
addresses. Refer to
Installation on page 5.
5 Verify that each used Ethernet port on the
iPBridge can be pinged from the desired host.
Refer to
Ping on page ix of the Appendix.
If the host cannot ping the iPBridge port and the
iPBridge port is properly configured, continue to
the Local Area Network/Wide Area Network
section,
Check the LAN/WAN on page 19.
Verify that each port on the iPBridge can ping
each desired host. Refer to
Ping on page ix of
the Appendix. If the iPBridge cannot ping the
host, continue to
Check the LAN/WAN on page
19.
6 If using DHCP, verify that the DHCP server is
assigning the correct IP information to the host.
7 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.
8 Verify that the host is logging into the iPBridge
correctly by viewing the Connections page
and determining if there a “session open”
status.
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 iPBridge iqn (iSCSI
qualified name). If left blank, Adaptec cannot
log in. Enter “iSCSI” into this field for auto iqn
discovery.
When changing any setting on the iPBridge the
configuration must be saved by using either the
saveConfiguration CLI command or through the
ATTO ExpressNAV interface.
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 are using
the same port number to communicate via
iSCSI. The default port number for 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
may have to force the host or switch to the
desired speed.