Making Connections To Iscsi Targets; Maximize Offload Iscsi Connections; Linux Iscsi Offload Faq - Dell Broadcom NetXtreme Family of Adapters User Manual

Linux Driver Software: Broadcom NetXtreme II Network Adapter User Guide
iface.transport_name = bnx2i
Ensure that the iface.hwaddress is in lower case format.
If you wish to switch back to use the software initiator, use the following:
iscsiadm --mode node --targetname iqn.2004-06.com.broadcom:tg1 \
--portal 192.168.1.100 --op=update
--name=iface_file_name
where the iface file includes the following information:
iface.net_ifacename = ethX
iface.iscsi_ifacename = <name of the iface file>
iface.transport_name = tcp

Making Connections to iSCSI Targets

Refer to open-iscsi documentation for a comprehensive list of iscsiadm commands. This is a sample list of commands to
discovery targets and to create iscsi connections to a target.
Add static entry
iscsiadm -m node -p <ipaddr[:port]> -T iqn.2007-05.com.broadcom:target1 -o new
iSCSI target discovery using 'SendTargets'
iscsiadm -m discovery --type sendtargets -p <ipaddr[:port]>
Bind iSCSI target to Broadcom NX2 transport (bnx2i)
iscsiadm -m node -p <ipaddr[:port]> -T <iqn.targetname> --op=update --name=iface_file_name
Login to target using 'iscsiadm' command
iscsiadm --mode node --targetname <iqn.targetname> --portal <ipaddr[:port]> --login
List all drives active in the system
fdisk -l

Maximize Offload iSCSI Connections

With default driver parameters set, which includes 128 outstanding commands, bnx2i can offload the following number of
connections:
BCM5708: 28
BCM5709: 43
BCM5771x: 128
This is not a hard limit, but just a simple on-chip resource allocation math. bnx2i will be able to offload > 28 connections on
1G devices by reducing the shared queue size, which in turn limits the maximum outstanding tasks on a connection. See
Setting Values for Optional Properties
when the maximum allowed connection offload limit is reached - "bnx2i: unable to allocate iSCSI context resources".

Linux iSCSI Offload FAQ

Not all Broadcom NetXtreme II adapters support iSCSI offload.
The iSCSI session will not recover after a hot remove and hot plug.
For MPIO to work properly, iSCSI nopout should be enabled on each iSCSI session. Refer to open-iscsi documentation
for procedures on setting up noop_out_interval and noop_out_timeout values.
In the scenario where multiple CNIC devices are in the system and the system is booted via Broadcom's iSCSI boot
solution, ensure that the iscsi node under /etc/iscsi/nodes for the boot target is bound to the NIC that is used for
booting.
Please read all Restrictions and
file:///T|/htdocs/NETWORK/BroadCom/71921/NetXtremeII/en/linux.htm[9/26/2012 3:28:46 PM]
for information on sq_size and rq_size. The driver logs the following message to syslog
Disclaimers.
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