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<body class="manpage">
<div id="header">
<h1>
nvme-connect(1) Manual Page
</h1>
<h2>NAME</h2>
<div class="sectionbody">
<p>nvme-connect -
Connect to a Fabrics controller.
</p>
</div>
</div>
<div id="content">
<div class="sect1">
<h2 id="_synopsis">SYNOPSIS</h2>
<div class="sectionbody">
<div class="verseblock">
<pre class="content"><em>nvme connect</em>
[--transport=<trtype> | -t <trtype>]
[--nqn=<subnqn> | -n <subnqn>]
[--traddr=<traddr> | -a <traddr>]
[--trsvcid=<trsvcid> | -s <trsvcid>]
[--host-traddr=<traddr> | -w <traddr>]
[--hostnqn=<hostnqn> | -q <hostnqn>]
[--hostid=<hostid> | -I <hostid>]
[--nr-io-queues=<#> | -i <#>]
[--nr-write-queues=<#> | -W <#>]
[--nr-poll-queues=<#> | -P <#>]
[--queue-size=<#> | -Q <#>]
[--keep-alive-tmo=<#> | -k <#>]
[--reconnect-delay=<#> | -c <#>]
[--ctrl-loss-tmo=<#> | -l <#>]
[--duplicate-connect | -D]
[--disable-sqflow | -d]
[--hdr-digest | -g]
[--data-digest | -G]</pre>
<div class="attribution">
</div></div>
</div>
</div>
<div class="sect1">
<h2 id="_description">DESCRIPTION</h2>
<div class="sectionbody">
<div class="paragraph"><p>Create a transport connection to a remote system (specified by --traddr and
--trsvcid) and create a NVMe over Fabrics controller for the NVMe subsystem
specified by the --nqn option.</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_options">OPTIONS</h2>
<div class="sectionbody">
<div class="dlist"><dl>
<dt class="hdlist1">
-t <trtype>
</dt>
<dt class="hdlist1">
--transport=<trtype>
</dt>
<dd>
<p>
This field specifies the network fabric being used for
a NVMe-over-Fabrics network. Current string values include:
</p>
<div class="tableblock">
<table rules="all"
width="100%"
frame="border"
cellspacing="0" cellpadding="4">
<col width="50%" />
<col width="50%" />
<tbody>
<tr>
<td align="left" valign="top"><p class="table">Value</p></td>
<td align="left" valign="top"><p class="table">Definition</p></td>
</tr>
<tr>
<td align="left" valign="top"><p class="table">rdma</p></td>
<td align="left" valign="top"><p class="table">The network fabric is an rdma network (RoCE, iWARP, Infiniband, basic rdma, etc)</p></td>
</tr>
<tr>
<td align="left" valign="top"><p class="table">fc</p></td>
<td align="left" valign="top"><p class="table"><strong>WIP</strong> The network fabric is a Fibre Channel network.</p></td>
</tr>
<tr>
<td align="left" valign="top"><p class="table">loop</p></td>
<td align="left" valign="top"><p class="table">Connect to a NVMe over Fabrics target on the local host</p></td>
</tr>
</tbody>
</table>
</div>
</dd>
<dt class="hdlist1">
-n <subnqn>
</dt>
<dt class="hdlist1">
--nqn <subnqn>
</dt>
<dd>
<p>
This field specifies the name for the NVMe subsystem to connect to.
</p>
</dd>
<dt class="hdlist1">
-a <traddr>
</dt>
<dt class="hdlist1">
--traddr=<traddr>
</dt>
<dd>
<p>
This field specifies the network address of the Controller.
For transports using IP addressing (e.g. rdma) this should be an
IP-based address (ex. IPv4).
</p>
</dd>
<dt class="hdlist1">
-s <trsvcid>
</dt>
<dt class="hdlist1">
--trsvcid=<trsvcid>
</dt>
<dd>
<p>
This field specifies the transport service id. For transports using IP
addressing (e.g. rdma) this field is the port number. By default, the IP
port number for the RDMA transport is 4420.
</p>
</dd>
<dt class="hdlist1">
-w <traddr>
</dt>
<dt class="hdlist1">
--host-traddr=<traddr>
</dt>
<dd>
<p>
This field specifies the network address used on the host to connect
to the Controller.
</p>
</dd>
<dt class="hdlist1">
-q <hostnqn>
</dt>
<dt class="hdlist1">
--hostnqn=<hostnqn>
</dt>
<dd>
<p>
Overrides the default Host NQN that identifies the NVMe Host.
If this option is not specified, the default is read from
/etc/nvme/hostnqn first. If that does not exist, the autogenerated
NQN value from the NVMe Host kernel module is used next.
The Host NQN uniquely identifies the NVMe Host.
</p>
</dd>
<dt class="hdlist1">
-I <hostid>
</dt>
<dt class="hdlist1">
--hostid=<hostid>
</dt>
<dd>
<p>
UUID(Universally Unique Identifier) to be discovered which should be
formatted.
</p>
</dd>
<dt class="hdlist1">
-i <#>
</dt>
<dt class="hdlist1">
--nr-io-queues=<#>
</dt>
<dd>
<p>
Overrides the default number of I/O queues create by the driver.
</p>
</dd>
<dt class="hdlist1">
-W <#>
</dt>
<dt class="hdlist1">
--nr-write-queues=<#>
</dt>
<dd>
<p>
Adds additional queues that will be used for write I/O.
</p>
</dd>
<dt class="hdlist1">
-P <#>
</dt>
<dt class="hdlist1">
--nr-poll-queues=<#>
</dt>
<dd>
<p>
Adds additional queues that will be used for polling latency sensitive I/O.
</p>
</dd>
<dt class="hdlist1">
-Q <#>
</dt>
<dt class="hdlist1">
--queue-size=<#>
</dt>
<dd>
<p>
Overrides the default number of elements in the I/O queues created
by the driver.
</p>
</dd>
<dt class="hdlist1">
-k <#>
</dt>
<dt class="hdlist1">
--keep-alive-tmo=<#>
</dt>
<dd>
<p>
Overrides the default keep alive timeout (in seconds).
</p>
</dd>
<dt class="hdlist1">
-c <#>
</dt>
<dt class="hdlist1">
--reconnect-delay=<#>
</dt>
<dd>
<p>
Overrides the default delay (in seconds) before reconnect is attempted
after a connect loss.
</p>
</dd>
<dt class="hdlist1">
-l <#>
</dt>
<dt class="hdlist1">
--ctrl-loss-tmo=<#>
</dt>
<dd>
<p>
Overrides the default controller loss timeout period (in seconds).
</p>
</dd>
<dt class="hdlist1">
-D
</dt>
<dt class="hdlist1">
--duplicate-connect
</dt>
<dd>
<p>
Allows duplicated connections between same trnsport host and subsystem
port.
</p>
</dd>
<dt class="hdlist1">
-d
</dt>
<dt class="hdlist1">
--disable-sqflow
</dt>
<dd>
<p>
Disables SQ flow control to omit head doorbell update for submission
queues when sending nvme completions.
</p>
</dd>
<dt class="hdlist1">
-g
</dt>
<dt class="hdlist1">
--hdr-digest
</dt>
<dd>
<p>
Generates/verifies header digest (TCP).
</p>
</dd>
<dt class="hdlist1">
-G
</dt>
<dt class="hdlist1">
--data-digest
</dt>
<dd>
<p>
Generates/verifies data digest (TCP).
</p>
</dd>
</dl></div>
</div>
</div>
<div class="sect1">
<h2 id="_examples">EXAMPLES</h2>
<div class="sectionbody">
<div class="ulist"><ul>
<li>
<p>
Connect to a subsystem named nqn.2014-08.com.example:nvme:nvm-subsystem-sn-d78432
on the IP4 address 192.168.1.3. Port 4420 is used by default:
</p>
<div class="listingblock">
<div class="content">
<pre><code># nvme connect --transport=rdma --traddr=192.168.1.3 \
--nqn=nqn.2014-08.com.example:nvme:nvm-subsystem-sn-d78432</code></pre>
</div></div>
</li>
</ul></div>
</div>
</div>
<div class="sect1">
<h2 id="_see_also">SEE ALSO</h2>
<div class="sectionbody">
<div class="paragraph"><p>nvme-discover(1)
nvme-connect-all(1)</p></div>
</div>
</div>
<div class="sect1">
<h2 id="_authors">AUTHORS</h2>
<div class="sectionbody">
<div class="paragraph"><p>This was co-written by <a href="mailto:james.p.freyensee@intel.com">Jay Freyensee</a>
and <a href="mailto:hch@lst.de">Christoph Hellwig</a></p></div>
</div>
</div>
<div class="sect1">
<h2 id="_nvme">NVME</h2>
<div class="sectionbody">
<div class="paragraph"><p>Part of the nvme-user suite</p></div>
</div>
</div>
</div>
<div id="footnotes"><hr /></div>
<div id="footer">
<div id="footer-text">
Last updated
2020-02-15 08:33:28 JST
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