does not have QoS configured, or if the port does not have a queue
with the specified ID, the default queue is used instead.
</dd>
+ <dt><code>flow-eviction-threshold</code></dt>
+ <dd>
+ A number of flows as a nonnegative integer. This sets number
+ of flows at which eviction from the kernel flow table will
+ be triggered.
+ If there are a large number of flows then increasing this
+ value to around the number of flows present
+ can result in reduced CPU usage and packet loss.
+ </dd>
+ <dd>
+ The default is 1000.
+ </dd>
+ <dd>
+ Values below 100 will be rounded up to 100.
+ </dd>
</dl>
</column>
</group>
</column>
</table>
- <table name="Mirror" title="Port mirroring (SPAN/RSPAN).">
+ <table name="Mirror" title="Port mirroring (SPAN/RSPAN/ERSPAN).">
<p>A port mirror within a <ref table="Bridge"/>.</p>
<p>A port mirror configures a bridge to send selected frames to special
- ``mirrored'' ports, in addition to their normal destinations. Mirroring
- traffic may also be referred to as SPAN or RSPAN, depending on the
- mechanism used for delivery.</p>
+ ``mirrored'' ports, in addition to their normal destinations. Mirroring
+ traffic may also be referred to as SPAN, RSPAN, or ERSPAN, depending on how
+ the mirrored traffic is sent.</p>
<column name="name">
Arbitrary identifier for the <ref table="Mirror"/>.
<column name="output_port">
<p>Output port for selected packets, if nonempty.</p>
<p>Specifying a port for mirror output reserves that port exclusively
- for mirroring. No frames other than those selected for mirroring
- will be forwarded to the port, and any frames received on the port
- will be discarded.</p>
- <p>This type of mirroring is sometimes called SPAN.</p>
+ for mirroring. No frames other than those selected for mirroring
+ will be forwarded to the port, and any frames received on the port
+ will be discarded.</p>
+ <p>
+ The output port may be any kind of port supported by Open vSwitch.
+ It may be, for example, a physical port (sometimes called SPAN), or a
+ GRE tunnel (sometimes called ERSPAN).
+ </p>
</column>
<column name="output_vlan">
<ref column="output_vlan"/>, replacing any existing tag; when it is
sent out an implicit VLAN port, the frame will not be tagged. This
type of mirroring is sometimes called RSPAN.</p>
+ <p>
+ The following destination MAC addresses will not be mirrored to a
+ VLAN to avoid confusing switches that interpret the protocols that
+ they represent:
+ </p>
+ <dl>
+ <dt><code>01:80:c2:00:00:00</code></dt>
+ <dd>IEEE 802.1D Spanning Tree Protocol (STP).</dd>
+
+ <dt><code>01:80:c2:00:00:01</code></dt>
+ <dd>IEEE Pause frame.</dd>
+
+ <dt><code>01:80:c2:00:00:0<var>x</var></code></dt>
+ <dd>Other reserved protocols.</dd>
+
+ <dt><code>01:00:0c:cc:cc:cc</code></dt>
+ <dd>
+ Cisco Discovery Protocol (CDP), VLAN Trunking Protocol (VTP),
+ Dynamic Trunking Protocol (DTP), Port Aggregation Protocol (PAgP),
+ and others.
+ </dd>
+
+ <dt><code>01:00:0c:cc:cc:cd</code></dt>
+ <dd>Cisco Shared Spanning Tree Protocol PVSTP+.</dd>
+
+ <dt><code>01:00:0c:cd:cd:cd</code></dt>
+ <dd>Cisco STP Uplink Fast.</dd>
+
+ <dt><code>01:00:0c:00:00:00</code></dt>
+ <dd>Cisco Inter Switch Link.</dd>
+ </dl>
<p><em>Please note:</em> Mirroring to a VLAN can disrupt a network that
contains unmanaged switches. Consider an unmanaged physical switch
with two ports: port 1, connected to an end host, and port 2,
Open vSwitch is being used as an intermediate switch, learning can be
disabled by adding the mirrored VLAN to <ref column="flood_vlans"/>
in the appropriate <ref table="Bridge"/> table or tables.</p>
+ <p>
+ Mirroring to a GRE tunnel has fewer caveats than mirroring to a
+ VLAN and should generally be preferred.
+ </p>
</column>
</group>
database (in seconds). Value is empty if manager has never
disconnected.</dd>
</dl>
+ <dl>
+ <dt><code>locks_held</code></dt>
+ <dt><code>locks_waiting</code></dt>
+ <dt><code>locks_lost</code></dt>
+ <dd>
+ Space-separated lists of the names of OVSDB locks that the
+ connection holds, is currently waiting to acquire, or has had
+ stolen by another OVSDB client, respectively. Key-value pairs for
+ lists that would be empty are omitted.
+ </dd>
+ </dl>
+ <dl>
+ <dt><code>n_connections</code></dt>
+ <dd>
+ <p>
+ When <ref column="target"/> specifies a connection method that
+ listens for inbound connections (e.g. <code>ptcp:</code> or
+ <code>pssl:</code>) and more than one connection is actually
+ active, the value is the number of active connections.
+ Otherwise, this key-value pair is omitted.
+ </p>
+ <p>
+ When multiple connections are active, status columns and
+ key-value pairs (other than this one) report the status of one
+ arbitrarily chosen connection.
+ </p>
+ </dd>
+ </dl>
</column>
</group>
</table>
git://git.onelab.eu / sliver-openvswitch.git / blobdiff