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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="iscsi-intnet">
<title>Access iSCSI Targets Using Internal Networking</title>
<body>
<p>As an experimental feature, <ph conkeyref="vbox-conkeyref-phrases/product-name"/> enables access to an iSCSI
target running in a virtual machine which is configured to use Internal Networking mode. See <xref
href="storage-iscsi.dita">iSCSI Servers</xref>, <xref href="network_internal.dita">Internal Networking</xref>,
and <xref href="vboxmanage-storageattach.dita">VBoxManage storageattach</xref>. </p>
<p>The IP stack accessing Internal Networking must be configured in the virtual machine which accesses the iSCSI
target. A free static IP and a MAC address not used by other virtual machines must be chosen. In the example
below, adapt the name of the virtual machine, the MAC address, the IP configuration, and the Internal Networking
name (MyIntNet) according to your needs. The following eight commands must first be issued: </p>
<pre xml:space="preserve">$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/Trusted 1
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/Config/MAC 08:00:27:01:02:0f
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/Config/IP 10.0.9.1
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/Config/Netmask 255.255.255.0
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/LUN#0/Driver IntNet
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/LUN#0/Config/Network MyIntNet
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/LUN#0/Config/TrunkType 2
$ VBoxManage setextradata <varname>VM-name</varname> \
VBoxInternal/Devices/IntNetIP/0/LUN#0/Config/IsService 1</pre>
<p>Finally the iSCSI disk must be attached with the <codeph>--intnet</codeph> option to tell the iSCSI initiator to
use internal networking, as follows: </p>
<pre xml:space="preserve">$ VBoxManage storageattach ... --medium iscsi --server 10.0.9.30 \
--target iqn.2008-12.com.sun:sampletarget --intnet</pre>
<p>Compared to a regular iSCSI setup, the IP address of the target <i>must</i> be specified as a numeric IP address,
as there is no DNS resolver for internal networking. </p>
<p>The virtual machine with the iSCSI target should be started before the VM using it is powered on. If a virtual
machine using an iSCSI disk is started without having the iSCSI target powered up, it can take up to 200 seconds
to detect this situation. The VM will fail to power up. </p>
</body>
</topic>
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