booting installed linux through iscsi

[bip]

Hello!
On think-client:
How I can boot from LUN (/dev/sdb, for example) (throught iSCSI) with installed linux?
I try execute sanboot command, but linux not started (I think because linux not supported iSCSI and not login into my target).
Can you help me?

I try repack initrd with open-iscsi, but it not good solution...(it is working).

On dhcp-server:
LUN: 1
Type: disk
SCSI ID: IET 00010001
SCSI SN: beaf11
Size: 10737 MB, Block size: 512
Online: Yes
Removable media: No
Prevent removal: No
Readonly: No
SWP: No
Thin-provisioning: No
Backing store type: rdwr
Backing store path: /dev/sdb
Backing store flags: