Cisco Systems 5709 用户手册

January 2010

Page 138

Linux iSCSI Offload

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ENGSRVT52-CDUM100-R

By default, the open-iscsi daemon connects to discovered targets using software initiator (transport name = 'tcp'). Users who
wish to offload iSCSI connection onto CNIC device should explicitly change transport binding of the iSCSI node. This can
be done using iscsiadm cli utility as follows,

iscsiadm --mode node --targetname iqn.2004-06.com.broadcom:tg1 \

--portal 192.168.1.100 --op=update \

--name=node.transport_name --value=${XPORT_NAME}

where XPORT_NAME=bcm570x-xxyyzz

xx - pci bus number of the NX2 device

yy - pci device number of the NX2 device

zz - pci function number of the NX2 device

Network interface to iscsi transport name binding can be obtained by executing the following.

dmesg | grep "bnx2i: netif"

Sample output in a system with two NetXtreme II devices:

bnx2i: netif=eth1, iscsi=bcm570x-050000

bnx2i: netif=eth0, iscsi=bcm570x-030000

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=node.transport_name --value=tcp

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.

iscsiadm -m node -p <ipaddr[:port]> -T iqn.2007-05.com.broadcom:target1 -o new 

iscsiadm -m discovery --type sendtargets -p <ipaddr[:port]> 

iscsiadm --mode node --targetname <iqn.targetname> --portal <ipaddr[:port]> --login

'fdisk -l'