<?xml version="1.0" encoding="utf-8"?>
<database title="Open vSwitch Configuration Database">
- <p>A database with this schema holds the configuration for one Open
- vSwitch daemon. The root of the configuration for the daemon is
- the <ref table="Open_vSwitch"/> table, which must have exactly one
+ <p>
+ A database with this schema holds the configuration for one Open
+ vSwitch daemon. The top-level configuration for the daemon is the
+ <ref table="Open_vSwitch"/> table, which must have exactly one
record. Records in other tables are significant only when they
- can be reached directly or indirectly from the
- <ref table="Open_vSwitch"/> table.</p>
+ can be reached directly or indirectly from the <ref
+ table="Open_vSwitch"/> table. Records that are not reachable from
+ the <ref table="Open_vSwitch"/> table are automatically deleted
+ from the database, except for records in a few distinguished
+ ``root set'' tables noted below.
+ </p>
<table name="Open_vSwitch" title="Open vSwitch configuration.">
- Configuration for an Open vSwitch daemon. There must be exactly one record
- in the <ref table="Open_vSwitch"/> table.
+ Configuration for an Open vSwitch daemon. There must be exactly
+ one record in the <ref table="Open_vSwitch"/> table.
<group title="Configuration">
<column name="bridges">
Set of bridges managed by the daemon.
</column>
- <column name="managers">
- Remote database clients to which the Open vSwitch's database server
- should connect or to which it should listen.
- </column>
-
<column name="ssl">
SSL used globally by the daemon.
</column>
+ <column name="other_config">
+ Key-value pairs for configuring rarely used Open vSwitch features. The
+ currently defined key-value pairs are:
+ <dl>
+ <dt><code>enable-statistics</code></dt>
+ <dd>
+ Set to <code>true</code> to enable populating the <ref
+ column="statistics"/> column or <code>false</code> (the default)
+ disable populating it.
+ </dd>
+ </dl>
+ </column>
+
<column name="external_ids">
Key-value pairs for use by external frameworks that integrate
with Open vSwitch, rather than by Open vSwitch itself. System
choose key names that are likely to be unique. The currently
defined common key-value pairs are:
<dl>
- <dt><code>system-type</code></dt>
- <dd>An identifier for the switch type, such as
- <code>XenServer</code> or <code>KVM</code>.</dd>
- <dt><code>system-version</code></dt>
- <dd>The version of the switch software, such as
- <code>5.6.0</code> on XenServer.</dd>
<dt><code>system-id</code></dt>
<dd>A unique identifier for the Open vSwitch's physical host.
The form of the identifier depends on the type of the host.
On a Citrix XenServer, this will likely be the same as
- <code>xs-system-uuid</code>.</dd>
+ <ref column="external_ids" key="xs-system-uuid"/>.</dd>
<dt><code>xs-system-uuid</code></dt>
<dd>The Citrix XenServer universally unique identifier for the
physical host as displayed by <code>xe host-list</code>.</dd>
apply to a platform are omitted.
</p>
+ <p>
+ Statistics are disabled unless <ref column="other-config"
+ key="enable-statistics"/> is set to <code>true</code>.
+ </p>
+
<dl>
<dt><code>cpu</code></dt>
<dd>
</dl>
</column>
</group>
+
+ <group title="Version Reporting">
+ <p>
+ These columns report the types and versions of the hardware and
+ software running Open vSwitch. We recommend in general that software
+ should test whether specific features are supported instead of relying
+ on version number checks. These values are primarily intended for
+ reporting to human administrators.
+ </p>
+
+ <column name="ovs_version">
+ The Open vSwitch version number, e.g. <code>1.1.0</code>.
+ If Open vSwitch was configured with a build number, then it is
+ also included, e.g. <code>1.1.0+build6579</code>.
+ </column>
+
+ <column name="db_version">
+ <p>
+ The database schema version number in the form
+ <code><var>major</var>.<var>minor</var>.<var>tweak</var></code>,
+ e.g. <code>1.2.3</code>. Whenever the database schema is changed in
+ a non-backward compatible way (e.g. deleting a column or a table),
+ <var>major</var> is incremented. When the database schema is changed
+ in a backward compatible way (e.g. adding a new column),
+ <var>minor</var> is incremented. When the database schema is changed
+ cosmetically (e.g. reindenting its syntax), <var>tweak</var> is
+ incremented.
+ </p>
+
+ <p>
+ The schema version is part of the database schema, so it can also be
+ retrieved by fetching the schema using the Open vSwitch database
+ protocol.
+ </p>
+ </column>
+
+ <column name="system_type">
+ <p>
+ An identifier for the type of system on top of which Open vSwitch
+ runs, e.g. <code>XenServer</code> or <code>KVM</code>.
+ </p>
+ <p>
+ System integrators are responsible for choosing and setting an
+ appropriate value for this column.
+ </p>
+ </column>
+
+ <column name="system_version">
+ <p>
+ The version of the system identified by <ref column="system_type"/>,
+ e.g. <code>5.6.100-39265p</code> on XenServer 5.6.100 build 39265.
+ </p>
+ <p>
+ System integrators are responsible for choosing and setting an
+ appropriate value for this column.
+ </p>
+ </column>
+
+ </group>
+
+ <group title="Database Configuration">
+ <p>
+ These columns primarily configure the Open vSwitch database
+ (<code>ovsdb-server</code>), not the Open vSwitch switch
+ (<code>ovs-vswitchd</code>). The OVSDB database also uses the <ref
+ column="ssl"/> settings.
+ </p>
+
+ <p>
+ The Open vSwitch switch does read the database configuration to
+ determine remote IP addresses to which in-band control should apply.
+ </p>
+
+ <column name="manager_options">
+ Database clients to which the Open vSwitch database server should
+ connect or to which it should listen, along with options for how these
+ connection should be configured. See the <ref table="Manager"/> table
+ for more information.
+ </column>
+ </group>
</table>
<table name="Bridge">
</dl>
</p>
<p>If this value is unset, the default is implementation-specific.</p>
- <p>When more than one controller is configured,
+ <p>When more than one controller is configured,
<ref column="fail_mode"/> is considered only when none of the
configured controllers can be contacted.</p>
</column>
<column name="datapath_id">
- Reports the OpenFlow datapath ID in use. Exactly 16 hex
- digits. (Setting this column will have no useful effect. Set
- <ref column="other_config"/>:<code>other-config</code>
- instead.)
+ Reports the OpenFlow datapath ID in use. Exactly 16 hex digits.
+ (Setting this column has no useful effect. Set <ref
+ column="other-config" key="datapath-id"/> instead.)
</column>
</group>
defined key-value pairs are:
<dl>
<dt><code>bridge-id</code></dt>
- <dd>A unique identifier of the bridge. On Citrix XenServer this
- will commonly be the same as <code>xs-network-uuids</code>.</dd>
+ <dd>A unique identifier of the bridge. On Citrix XenServer this will
+ commonly be the same as
+ <ref column="external_ids" key="xs-network-uuids"/>.</dd>
<dt><code>xs-network-uuids</code></dt>
<dd>Semicolon-delimited set of universally unique identifier(s) for
the network with which this bridge is associated on a Citrix
digits to set the OpenFlow datapath ID to a specific
value. May not be all-zero.</dd>
<dt><code>disable-in-band</code></dt>
- <dd>If set to <code>true</code>, disable in-band control on
+ <dd>If set to <code>true</code>, disable in-band control on
the bridge regardless of controller and manager settings.</dd>
<dt><code>hwaddr</code></dt>
<dd>An Ethernet address in the form
<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>
to set the hardware address of the local port and influence the
datapath ID.</dd>
+ <dt><code>in-band-queue</code></dt>
+ <dd>
+ A queue ID as a nonnegative integer. This sets the OpenFlow queue
+ ID that will be used by flows set up by in-band control on this
+ bridge. If unset, or if the port used by an in-band control flow
+ 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>
</dl>
</column>
</group>
</group>
<group title="Bonding Configuration">
- <p>A port that has more than one interface is a ``bonded port.''
- Bonding allows for load balancing and fail-over. Open vSwitch
- supports ``source load balancing'' (SLB) bonding, which
- assigns flows to slaves based on source MAC address, with
- periodic rebalancing as traffic patterns change. This form of
- bonding does not require 802.3ad or other special support from
- the upstream switch to which the slave devices are
- connected.</p>
+ <p>A port that has more than one interface is a ``bonded port.'' Bonding
+ allows for load balancing and fail-over. Some kinds of bonding will
+ work with any kind of upstream switch:</p>
+
+ <dl>
+ <dt><code>balance-slb</code></dt>
+ <dd>
+ Balances flows among slaves based on source MAC address and output
+ VLAN, with periodic rebalancing as traffic patterns change.
+ </dd>
+
+ <dt><code>active-backup</code></dt>
+ <dd>
+ Assigns all flows to one slave, failing over to a backup slave when
+ the active slave is disabled.
+ </dd>
+ </dl>
+
+ <p>
+ The following modes require the upstream switch to support 802.3ad with
+ successful LACP negotiation. If LACP negotiation fails then
+ <code>balance-slb</code> style flow hashing is used as a fallback:
+ </p>
+
+ <dl>
+ <dt><code>balance-tcp</code></dt>
+ <dd>
+ Balances flows among slaves based on L2, L3, and L4 protocol
+ information such as destination MAC address, IP address, and TCP
+ port.
+ </dd>
+ </dl>
+
+ <dl>
+ <dt><code>stable</code></dt>
+ <dd>
+ <p>Attempts to always assign a given flow to the same slave
+ consistently. In an effort to maintain stability, no load
+ balancing is done. Uses a similar hashing strategy to
+ <code>balance-tcp</code>, always taking into account L3 and L4
+ fields even if LACP negotiations are unsuccessful. </p>
+ <p>Slave selection decisions are made based on <ref table="Interface"
+ column="other_config" key="bond-stable-id"/> if set. Otherwise,
+ OpenFlow port number is used. Decisions are consistent across all
+ <code>ovs-vswitchd</code> instances with equivalent
+ <ref table="Interface" column="other_config" key="bond-stable-id"/>
+ values.</p>
+ </dd>
+ </dl>
<p>These columns apply only to bonded ports. Their values are
otherwise ignored.</p>
+ <column name="bond_mode">
+ <p>The type of bonding used for a bonded port. Defaults to
+ <code>balance-slb</code> if unset.
+ </p>
+ </column>
+
<column name="bond_updelay">
<p>For a bonded port, the number of milliseconds for which carrier must
stay up on an interface before the interface is considered to be up.
name of the port. Use only for compatibility with legacy software that
requires this.
</column>
+
+ <column name="lacp">
+ <p>Configures LACP on this port. LACP allows directly connected
+ switches to negotiate which links may be bonded. LACP may be enabled
+ on non-bonded ports for the benefit of any switches they may be
+ connected to. <code>active</code> ports are allowed to initiate LACP
+ negotiations. <code>passive</code> ports are allowed to participate
+ in LACP negotiations initiated by a remote switch, but not allowed to
+ initiate such negotiations themselves. If unset Open vSwitch will
+ choose a reasonable default. </p>
+ </column>
+
</group>
<group title="Other Features">
<column name="qos">
Quality of Service configuration for this port.
</column>
-
+
<column name="mac">
The MAC address to use for this port for the purpose of choosing the
bridge's MAC address. This column does not necessarily reflect the
<dd>An Ethernet address in the form
<code><var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var></code>.</dd>
<dt><code>bond-rebalance-interval</code></dt>
- <dd>For a bonded port, the number of milliseconds between
+ <dd>For an SLB bonded port, the number of milliseconds between
successive attempts to rebalance the bond, that is, to
move source MACs and their flows from one interface on
the bond to another in an attempt to keep usage of each
interface roughly equal. The default is 10000 (10
seconds), and the minimum is 1000 (1 second).</dd>
+ <dt><code>bond-detect-mode</code></dt>
+ <dd> Sets the method used to detect link failures in a bonded port.
+ Options are <code>carrier</code> and <code>miimon</code>. Defaults
+ to <code>carrier</code> which uses each interface's carrier to detect
+ failures. When set to <code>miimon</code>, will check for failures
+ by polling each interface's MII. </dd>
+ <dt><code>bond-miimon-interval</code></dt>
+ <dd> The number of milliseconds between successive attempts to
+ poll each interface's MII. Only relevant on ports which use
+ <code>miimon</code> to detect failures. </dd>
+ <dt><code>bond-hash-basis</code></dt>
+ <dd> An integer hashed along with flows when choosing output slaves.
+ When changed, all flows will be assigned different hash values
+ possibly causing slave selection decisions to change.</dd>
+ <dt><code>lacp-system-id</code></dt>
+ <dd> The LACP system ID of this <ref table="Port"/>. The system ID
+ of a LACP bond is used to identify itself to its partners. Must
+ be a nonzero MAC address.</dd>
+ <dt><code>lacp-system-priority</code></dt>
+ <dd> The LACP system priority of this <ref table="Port"/>. In
+ LACP negotiations, link status decisions are made by the system
+ with the numerically lower priority. Must be a number between 1
+ and 65535.</dd>
+ <dt><code>lacp-time</code></dt>
+ <dd>
+ <p>The LACP timing which should be used on this
+ <ref table="Port"/>. Possible values are <code>fast</code>,
+ <code>slow</code> and a positive number of milliseconds. By
+ default <code>slow</code> is used. When configured to be
+ <code>fast</code> LACP heartbeats are requested at a rate of once
+ per second causing connectivity problems to be detected more
+ quickly. In <code>slow</code> mode, heartbeats are requested at
+ a rate of once every 30 seconds.</p>
+
+ <p>Users may manually set a heartbeat transmission rate to increase
+ the fault detection speed further. When manually set, OVS
+ expects the partner switch to be configured with the same
+ transmission rate. Manually setting <code>lacp-time</code> to
+ something other than <code>fast</code> or <code>slow</code> is
+ not supported by the LACP specification.</p>
+ </dd>
+ <dt><code>lacp-heartbeat</code></dt>
+ <dd> Treats LACP like a simple heartbeat protocol for link state
+ monitoring. Most features of the LACP protocol are disabled when
+ this mode is in use.</dd>
</dl>
</column>
</group>
<dd>A TUN/TAP device managed by Open vSwitch.</dd>
<dt><code>gre</code></dt>
<dd>An Ethernet over RFC 2890 Generic Routing Encapsulation over IPv4
- tunnel. Each tunnel must be uniquely identified by the
- combination of <code>remote_ip</code>, <code>local_ip</code>, and
- <code>in_key</code>. Note that if two ports are defined that are
- the same except one has an optional identifier and the other does
- not, the more specific one is matched first. <code>in_key</code>
- is considered more specific than <code>local_ip</code> if a port
- defines one and another port defines the other. The following
- options may be specified in the <ref column="options"/> column:
+ tunnel. Each tunnel must be uniquely identified by the
+ combination of <ref column="options" key="remote_ip"/>,
+ <ref column="options" key="local_ip"/>, and
+ <ref column="options" key="in_key"/>. Note that if two ports
+ are defined that are the same except one has an optional
+ identifier and the other does not, the more specific one is
+ matched first. <ref column="options" key="in_key"/> is considered
+ more specific than <ref column="options" key="local_ip"/> if a port
+ defines one and another port defines the other. The following
+ options may be specified in the <ref column="options"/> column:
<dl>
<dt><code>remote_ip</code></dt>
<dd>Required. The tunnel endpoint.</dd>
adds value for the GRE and encapsulated Ethernet headers.
Default is disabled, set to <code>true</code> to enable.</dd>
</dl>
+ <dl>
+ <dt><code>df_inherit</code></dt>
+ <dd>Optional. If enabled, the Don't Fragment bit will be copied
+ from the inner IP headers (those of the encapsulated traffic)
+ to the outer (tunnel) headers. Default is disabled; set to
+ <code>true</code> to enable.</dd>
+ </dl>
+ <dl>
+ <dt><code>df_default</code></dt>
+ <dd>Optional. If enabled, the Don't Fragment bit will be set by
+ default on tunnel headers if the <code>df_inherit</code> option
+ is not set, or if the encapsulated packet is not IP. Default
+ is enabled; set to <code>false</code> to disable.</dd>
+ </dl>
<dl>
<dt><code>pmtud</code></dt>
<dd>Optional. Enable tunnel path MTU discovery. If enabled
- ``ICMP destination unreachable - fragmentation'' needed
+ ``ICMP Destination Unreachable - Fragmentation Needed''
messages will be generated for IPv4 packets with the DF bit set
and IPv6 packets above the minimum MTU if the packet size
- exceeds the path MTU minus the size of the tunnel headers. It
- also forces the encapsulating packet DF bit to be set (it is
- always set if the inner packet implies path MTU discovery).
+ exceeds the path MTU minus the size of the tunnel headers.
Note that this option causes behavior that is typically
reserved for routers and therefore is not entirely in
compliance with the IEEE 802.1D specification for bridges.
- Default is enabled, set to <code>false</code> to disable.</dd>
+ Default is enabled; set to <code>false</code> to disable.</dd>
</dl>
<dl>
<dt><code>header_cache</code></dt>
bypass certain components of the IP stack (such as IP tables)
and it may be useful to disable it if these features are
required or as a debugging measure. Default is enabled, set to
- <code>false</code> to disable. If IPsec is enabled through the
- <ref column="other_config"/> parameters, header caching will be
- automatically disabled.</dd>
+ <code>false</code> to disable.</dd>
+ </dl>
+ </dd>
+ <dt><code>ipsec_gre</code></dt>
+ <dd>An Ethernet over RFC 2890 Generic Routing Encapsulation
+ over IPv4 IPsec tunnel. Each tunnel (including those of type
+ <code>gre</code>) must be uniquely identified by the
+ combination of <ref column="options" key="remote_ip"/> and
+ <ref column="options" key="local_ip"/>. Note that if two ports are
+ defined that are the same except one has an optional identifier and
+ the other does not, the more specific one is matched first.
+ An authentication method of <ref column="options" key="peer_cert"/>
+ or <ref column="options" key="psk"/> must be defined. The
+ following options may be specified in the <ref column="options"/>
+ column:
+ <dl>
+ <dt><code>remote_ip</code></dt>
+ <dd>Required. The tunnel endpoint.</dd>
+ </dl>
+ <dl>
+ <dt><code>local_ip</code></dt>
+ <dd>Optional. The destination IP that received packets must
+ match. Default is to match all addresses.</dd>
+ </dl>
+ <dl>
+ <dt><code>peer_cert</code></dt>
+ <dd>Required for certificate authentication. A string
+ containing the peer's certificate in PEM format.
+ Additionally the host's certificate must be specified
+ with the <code>certificate</code> option.</dd>
+ </dl>
+ <dl>
+ <dt><code>certificate</code></dt>
+ <dd>Required for certificate authentication. The name of a
+ PEM file containing a certificate that will be presented
+ to the peer during authentication.</dd>
+ </dl>
+ <dl>
+ <dt><code>private_key</code></dt>
+ <dd>Optional for certificate authentication. The name of
+ a PEM file containing the private key associated with
+ <code>certificate</code>. If <code>certificate</code>
+ contains the private key, this option may be omitted.</dd>
+ </dl>
+ <dl>
+ <dt><code>psk</code></dt>
+ <dd>Required for pre-shared key authentication. Specifies a
+ pre-shared key for authentication that must be identical on
+ both sides of the tunnel.</dd>
+ </dl>
+ <dl>
+ <dt><code>in_key</code></dt>
+ <dd>Optional. The GRE key that received packets must contain.
+ It may either be a 32-bit number (no key and a key of 0 are
+ treated as equivalent) or the word <code>flow</code>. If
+ <code>flow</code> is specified then any key will be accepted
+ and the key will be placed in the <code>tun_id</code> field
+ for matching in the flow table. The ovs-ofctl manual page
+ contains additional information about matching fields in
+ OpenFlow flows. Default is no key.</dd>
+ </dl>
+ <dl>
+ <dt><code>out_key</code></dt>
+ <dd>Optional. The GRE key to be set on outgoing packets. It may
+ either be a 32-bit number or the word <code>flow</code>. If
+ <code>flow</code> is specified then the key may be set using
+ the <code>set_tunnel</code> Nicira OpenFlow vendor extension (0
+ is used in the absence of an action). The ovs-ofctl manual
+ page contains additional information about the Nicira OpenFlow
+ vendor extensions. Default is no key.</dd>
+ </dl>
+ <dl>
+ <dt><code>key</code></dt>
+ <dd>Optional. Shorthand to set <code>in_key</code> and
+ <code>out_key</code> at the same time.</dd>
+ </dl>
+ <dl>
+ <dt><code>tos</code></dt>
+ <dd>Optional. The value of the ToS bits to be set on the
+ encapsulating packet. It may also be the word
+ <code>inherit</code>, in which case the ToS will be copied from
+ the inner packet if it is IPv4 or IPv6 (otherwise it will be
+ 0). Note that the ECN fields are always inherited. Default is
+ 0.</dd>
+ </dl>
+ <dl>
+ <dt><code>ttl</code></dt>
+ <dd>Optional. The TTL to be set on the encapsulating packet.
+ It may also be the word <code>inherit</code>, in which case the
+ TTL will be copied from the inner packet if it is IPv4 or IPv6
+ (otherwise it will be the system default, typically 64).
+ Default is the system default TTL.</dd>
+ </dl>
+ <dl>
+ <dt><code>csum</code></dt>
+ <dd>Optional. Compute GRE checksums on outgoing packets.
+ Checksums present on incoming packets will be validated
+ regardless of this setting. Note that GRE checksums
+ impose a significant performance penalty as they cover the
+ entire packet. As the contents of the packet is typically
+ covered by L3 and L4 checksums, this additional checksum only
+ adds value for the GRE and encapsulated Ethernet headers.
+ Default is disabled, set to <code>true</code> to enable.</dd>
+ </dl>
+ <dl>
+ <dt><code>df_inherit</code></dt>
+ <dd>Optional. If enabled, the Don't Fragment bit will be copied
+ from the inner IP headers (those of the encapsulated traffic)
+ to the outer (tunnel) headers. Default is disabled; set to
+ <code>true</code> to enable.</dd>
+ </dl>
+ <dl>
+ <dt><code>df_default</code></dt>
+ <dd>Optional. If enabled, the Don't Fragment bit will be set by
+ default on tunnel headers if the <code>df_inherit</code> option
+ is not set, or if the encapsulated packet is not IP. Default
+ is enabled; set to <code>false</code> to disable.</dd>
+ </dl>
+ <dl>
+ <dt><code>pmtud</code></dt>
+ <dd>Optional. Enable tunnel path MTU discovery. If enabled
+ ``ICMP Destination Unreachable - Fragmentation Needed''
+ messages will be generated for IPv4 packets with the DF bit set
+ and IPv6 packets above the minimum MTU if the packet size
+ exceeds the path MTU minus the size of the tunnel headers.
+ Note that this option causes behavior that is typically
+ reserved for routers and therefore is not entirely in
+ compliance with the IEEE 802.1D specification for bridges.
+ Default is enabled; set to <code>false</code> to disable.</dd>
</dl>
</dd>
<dt><code>capwap</code></dt>
where GRE is not available. Note that only the tunneling component
of the protocol is implemented. Due to the non-standard use of
CAPWAP, UDP ports 58881 and 58882 are used as the source and
- destinations ports respectivedly. Each tunnel must be uniquely
- identified by the combination of <code>remote_ip</code> and
- <code>local_ip</code>. If two ports are defined that are the same
- except one includes <code>local_ip</code> and the other does not,
- the more specific one is matched first. CAPWAP support is not
+ destination ports respectively. Each tunnel must be uniquely
+ identified by the combination of
+ <ref column="options" key="remote_ip"/> and
+ <ref column="options" key="local_ip"/>. If two ports are defined
+ that are the same except one includes
+ <ref column="options" key="local_ip"/> and the other does not, the
+ more specific one is matched first. CAPWAP support is not
available on all platforms. Currently it is only supported in the
Linux kernel module with kernel versions >= 2.6.25. The following
options may be specified in the <ref column="options"/> column:
(otherwise it will be the system default, typically 64).
Default is the system default TTL.</dd>
</dl>
+ <dl>
+ <dt><code>df_inherit</code></dt>
+ <dd>Optional. If enabled, the Don't Fragment bit will be copied
+ from the inner IP headers (those of the encapsulated traffic)
+ to the outer (tunnel) headers. Default is disabled; set to
+ <code>true</code> to enable.</dd>
+ </dl>
+ <dl>
+ <dt><code>df_default</code></dt>
+ <dd>Optional. If enabled, the Don't Fragment bit will be set by
+ default on tunnel headers if the <code>df_inherit</code> option
+ is not set, or if the encapsulated packet is not IP. Default
+ is enabled; set to <code>false</code> to disable.</dd>
+ </dl>
<dl>
<dt><code>pmtud</code></dt>
<dd>Optional. Enable tunnel path MTU discovery. If enabled
- ``ICMP destination unreachable - fragmentation'' needed
+ ``ICMP Destination Unreachable - Fragmentation Needed''
messages will be generated for IPv4 packets with the DF bit set
and IPv6 packets above the minimum MTU if the packet size
- exceeds the path MTU minus the size of the tunnel headers. It
- also forces the encapsulating packet DF bit to be set (it is
- always set if the inner packet implies path MTU discovery).
+ exceeds the path MTU minus the size of the tunnel headers.
Note that this option causes behavior that is typically
reserved for routers and therefore is not entirely in
compliance with the IEEE 802.1D specification for bridges.
- Default is enabled, set to <code>false</code> to disable.</dd>
+ Default is enabled; set to <code>false</code> to disable.</dd>
</dl>
<dl>
<dt><code>header_cache</code></dt>
</dd>
</dl>
</dd>
+ <dt><code>null</code></dt>
+ <dd>An ignored interface.</dd>
</dl>
</column>
Configuration options whose interpretation varies based on
<ref column="type"/>.
</column>
+ </group>
+
+ <group title="Interface Status">
+ <p>
+ Status information about interfaces attached to bridges, updated every
+ 5 seconds. Not all interfaces have all of these properties; virtual
+ interfaces don't have a link speed, for example. Non-applicable
+ columns will have empty values.
+ </p>
+ <column name="admin_state">
+ <p>
+ The administrative state of the physical network link.
+ </p>
+ </column>
+
+ <column name="link_state">
+ <p>
+ The observed state of the physical network link. This is ordinarily
+ the link's carrier status. If the interface's <ref table="Port"/> is
+ a bond configured for miimon monitoring, it is instead the network
+ link's miimon status.
+ </p>
+ </column>
+
+ <column name="link_speed">
+ <p>
+ The negotiated speed of the physical network link.
+ Valid values are positive integers greater than 0.
+ </p>
+ </column>
+
+ <column name="duplex">
+ <p>
+ The duplex mode of the physical network link.
+ </p>
+ </column>
+
+ <column name="mtu">
+ <p>
+ The MTU (maximum transmission unit); i.e. the largest
+ amount of data that can fit into a single Ethernet frame.
+ The standard Ethernet MTU is 1500 bytes. Some physical media
+ and many kinds of virtual interfaces can be configured with
+ higher MTUs.
+ </p>
+ <p>
+ This column will be empty for an interface that does not
+ have an MTU as, for example, some kinds of tunnels do not.
+ </p>
+ </column>
<column name="status">
<p>
- Key-value pairs that report port status. Supported status
- values are <code>type</code>-dependent.
+ Key-value pairs that report port status. Supported status values are
+ <ref column="type"/>-dependent; some interfaces may not have a valid
+ <ref column="status" key="driver_name"/>, for example.
</p>
- <p>The only currently defined key-value pair is:</p>
+ <p>The currently defined key-value pairs are:</p>
+ <dl>
+ <dt><code>driver_name</code></dt>
+ <dd>The name of the device driver controlling the network
+ adapter.</dd>
+ </dl>
+ <dl>
+ <dt><code>driver_version</code></dt>
+ <dd>The version string of the device driver controlling the
+ network adapter.</dd>
+ </dl>
+ <dl>
+ <dt><code>firmware_version</code></dt>
+ <dd>The version string of the network adapter's firmware, if
+ available.</dd>
+ </dl>
<dl>
<dt><code>source_ip</code></dt>
<dd>The source IP address used for an IPv4 tunnel end-point,
- such as <code>gre</code> or <code>capwap</code>. Not
- supported by all implementations.</dd>
+ such as <code>gre</code> or <code>capwap</code>.</dd>
+ </dl>
+ <dl>
+ <dt><code>tunnel_egress_iface</code></dt>
+ <dd>Egress interface for tunnels. Currently only relevant for GRE
+ and CAPWAP tunnels. On Linux systems, this column will show
+ the name of the interface which is responsible for routing
+ traffic destined for the configured
+ <ref column="options" key="remote_ip"/>. This could be an
+ internal interface such as a bridge port.</dd>
+ </dl>
+ <dl>
+ <dt><code>tunnel_egress_iface_carrier</code></dt>
+ <dd>Whether a carrier is detected on
+ <ref column="status" key="tunnel_egress_iface"/>. Valid values
+ are <code>down</code> and <code>up</code>.</dd>
</dl>
</column>
</group>
</column>
</group>
+ <group title="Connectivity Fault Management">
+ <p>
+ 802.1ag Connectivity Fault Management (CFM) allows a group of
+ Maintenance Points (MPs) called a Maintenance Association (MA) to
+ detect connectivity problems with each other. MPs within a MA should
+ have complete and exclusive interconnectivity. This is verified by
+ occasionally broadcasting Continuity Check Messages (CCMs) at a
+ configurable transmission interval.
+ </p>
+
+ <column name="cfm_mpid">
+ A Maintenance Point ID (MPID) uniquely identifies each endpoint within
+ a Maintenance Association. The MPID is used to identify this endpoint
+ to other Maintenance Points in the MA. Each end of a link being
+ monitored should have a different MPID. Must be configured to enable
+ CFM on this <ref table="Interface"/>.
+ </column>
+
+ <column name="cfm_remote_mpid">
+ The MPID of the remote endpoint being monitored. If this
+ <ref table="Interface"/> does not have connectivity to an endpoint
+ advertising the configured MPID, a fault is signalled. Must be
+ configured to enable CFM on this <ref table="Interface"/>
+ </column>
+
+ <column name="cfm_fault">
+ Indicates a connectivity fault triggered by an inability to receive
+ heartbeats from the remote endpoint. When a fault is triggered on
+ <ref table="Interface"/>s participating in bonds, they will be
+ disabled.
+ </column>
+ </group>
+
<group title="Other Features">
+
+ <column name="lacp_current">
+ Boolean value indicating LACP status for this interface. If true, this
+ interface has current LACP information about its LACP partner. This
+ information may be used to monitor the health of interfaces in a LACP
+ enabled port. This column will be empty if LACP is not enabled.
+ </column>
+
<column name="external_ids">
Key-value pairs for use by external frameworks that integrate
with Open vSwitch, rather than by Open vSwitch itself. System
For Citrix XenServer, this is the value of the <code>MAC</code>
field in the VIF record for this interface.</dd>
<dt><code>iface-id</code></dt>
- <dd>A system-unique identifier for the interface. On XenServer,
- this will commonly be the same as <code>xs-vif-uuid</code>.</dd>
+ <dd>A system-unique identifier for the interface. On XenServer,
+ this will commonly be the same as
+ <ref column="external_ids" key="xs-vif-uuid"/>.</dd>
</dl>
<p>
Additionally the following key-value pairs specifically
</column>
<column name="other_config">
- Key-value pairs for rarely used interface features. Currently,
- the only keys are for configuring GRE-over-IPsec, which is only
- available through the <code>openvswitch-ipsec</code> package for
- Debian. The currently defined key-value pairs are:
+ Key-value pairs for rarely used interface features.
<dl>
- <dt><code>ipsec_local_ip</code></dt>
- <dd>Required key for GRE-over-IPsec interfaces. Additionally,
- the <ref column="type"/> must be <code>gre</code> and the
- <code>ipsec_psk</code> <ref column="other_config"/> key must
- be set. The <code>in_key</code>, <code>out_key</code>, and
- <code>key</code> <ref column="options"/> must not be
- set.</dd>
- <dt><code>ipsec_psk</code></dt>
- <dd>Required key for GRE-over-IPsec interfaces. Specifies a
- pre-shared key for authentication that must be identical on
- both sides of the tunnel. Additionally, the
- <code>ipsec_local_ip</code> key must also be set.</dd>
+ <dt><code>cfm_interval</code></dt>
+ <dd> The transmission interval of CFM heartbeats in milliseconds.
+ Three missed heartbeat receptions indicate a connectivity fault.
+ Defaults to 1000ms. </dd>
+ <dt><code>bond-stable-id</code></dt>
+ <dd> A positive integer using in <code>stable</code> bond mode to
+ make slave selection decisions. Allocating
+ <ref column="other_config" key="bond-stable-id"/> values
+ consistently across interfaces participating in a bond will
+ guarantee consistent slave selection decisions across
+ <code>ovs-vswitchd</code> instances when using <code>stable</code>
+ bonding mode.</dd>
+ <dt><code>lacp-port-id</code></dt>
+ <dd> The LACP port ID of this <ref table="Interface"/>. Port IDs are
+ used in LACP negotiations to identify individual ports
+ participating in a bond. Must be a number between 1 and
+ 65535.</dd>
+ <dt><code>lacp-port-priority</code></dt>
+ <dd> The LACP port priority of this <ref table="Interface"/>. In
+ LACP negotiations <ref table="Interface"/>s with numerically lower
+ priorities are preferred for aggregation. Must be a number between
+ 1 and 65535.</dd>
+ <dt><code>lacp-aggregation-key</code></dt>
+ <dd> The LACP aggregation key of this <ref table="Interface"/>.
+ <ref table="Interface"/>s with different aggregation keys may not
+ be active within a given <ref table="Port"/> at the same time. Must
+ be a number between 1 and 65535.</dd>
</dl>
</column>
for information on how this classifier works and how to configure it.
</dd>
</dl>
+ <dl>
+ <dt><code>linux-hfsc</code></dt>
+ <dd>
+ Linux "Hierarchical Fair Service Curve" classifier.
+ See <code>http://linux-ip.net/articles/hfsc.en/</code> for
+ information on how this classifier works.
+ </dd>
+ </dl>
</column>
<column name="queues">
<column name="other_config">
<p>Key-value pairs for configuring QoS features that depend on
<ref column="type"/>.</p>
- <p>The <code>linux-htb</code> class supports the following key-value
- pairs:</p>
+ <p>The <code>linux-htb</code> and <code>linux-hfsc</code> classes support
+ the following key-value pairs:</p>
<dl>
<dt><code>max-rate</code></dt>
<dd>Maximum rate shared by all queued traffic, in bit/s.
column="type"/> of <code>linux-htb</code> are:</p>
<dl>
<dt><code>min-rate</code></dt>
- <dd>Minimum guaranteed bandwidth, in bit/s. Required.</dd>
+ <dd>Minimum guaranteed bandwidth, in bit/s.</dd>
<dt><code>max-rate</code></dt>
<dd>Maximum allowed bandwidth, in bit/s. Optional. If specified, the
queue's rate will not be allowed to exceed the specified value, even
a queue with a larger value receives any. Specific priority
values are unimportant; only relative ordering matters.</dd>
</dl>
+ <p>The key-value pairs defined for <ref table="QoS"/> <ref table="QoS"
+ column="type"/> of <code>linux-hfsc</code> are:</p>
+ <dl>
+ <dt><code>min-rate</code></dt>
+ <dd>Minimum guaranteed bandwidth, in bit/s.</dd>
+ <dt><code>max-rate</code></dt>
+ <dd>Maximum allowed bandwidth, in bit/s. Optional. If specified, the
+ queue's rate will not be allowed to exceed the specified value, even
+ if excess bandwidth is available. If unspecified, defaults to no
+ limit.</dd>
+ </dl>
</column>
<column name="external_ids">
</column>
<group title="Selecting Packets for Mirroring">
+ <p>
+ To be selected for mirroring, a given packet must enter or leave the
+ bridge through a selected port and it must also be in one of the
+ selected VLANs.
+ </p>
+
<column name="select_all">
If true, every packet arriving or departing on any port is
selected for mirroring.
</group>
<group title="Mirroring Destination Configuration">
+ <p>
+ These columns are mutually exclusive. Exactly one of them must be
+ nonempty.
+ </p>
+
<column name="output_port">
- <p>Output port for selected packets, if nonempty. Mutually exclusive
- with <ref column="output_vlan"/>.</p>
+ <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
</column>
<column name="output_vlan">
- <p>Output VLAN for selected packets, if nonempty. Mutually exclusive
- with <ref column="output_port"/>.</p>
+ <p>Output VLAN for selected packets, if nonempty.</p>
<p>The frames will be sent out all ports that trunk
<ref column="output_vlan"/>, as well as any ports with implicit VLAN
<ref column="output_vlan"/>. When a mirrored frame is sent out a
<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,
<p>
Open vSwitch supports two kinds of OpenFlow controllers:
</p>
-
+
<dl>
<dt>Primary controllers</dt>
<dd>
<dd>The specified TCP <var>port</var> (default: 6633) on the host at
the given <var>ip</var>, which must be expressed as an IP address
(not a DNS name).</dd>
- <dt><code>discover</code></dt>
- <dd>
- <p>Enables controller discovery.</p>
- <p>In controller discovery mode, Open vSwitch broadcasts a DHCP
- request with vendor class identifier <code>OpenFlow</code> across
- all of the bridge's network devices. It will accept any valid
- DHCP reply that has the same vendor class identifier and includes
- a vendor-specific option with code 1 whose contents are a string
- specifying the location of the controller in the same format as
- <ref column="target"/>.</p>
- <p>The DHCP reply may also, optionally, include a vendor-specific
- option with code 2 whose contents are a string specifying the URI
- to the base of the OpenFlow PKI
- (e.g. <code>http://192.168.0.1/openflow/pki</code>). This URI is
- used only for bootstrapping the OpenFlow PKI at initial switch
- setup; <code>ovs-vswitchd</code> does not use it at all.</p>
- </dd>
</dl>
<p>
The following connection methods are currently supported for service
</dd>
</dl>
- <p>If not specified, the default is implementation-specific. If
- <ref column="target"/> is <code>discover</code>, the connection mode
- is always treated as <code>in-band</code> regardless of the actual
- setting.</p>
+ <p>If not specified, the default is implementation-specific.</p>
</column>
</group>
number of seconds, it will send a probe. If a response is not
received for the same additional amount of time, Open vSwitch
assumes the connection has been broken and attempts to reconnect.
- Default is implementation-specific.
+ Default is implementation-specific. A value of 0 disables
+ inactivity probes.
</column>
</group>
</column>
</group>
- <group title="Additional Discovery Configuration">
- <p>These values are considered only when <ref column="target"/>
- is <code>discover</code>.</p>
-
- <column name="discover_accept_regex">
- A POSIX
- extended regular expression against which the discovered controller
- location is validated. The regular expression is implicitly
- anchored at the beginning of the controller location string, as
- if it begins with <code>^</code>. If not specified, the default
- is implementation-specific.
- </column>
-
- <column name="discover_update_resolv_conf">
- Whether to update <code>/etc/resolv.conf</code> when the
- controller is discovered. If not specified, the default
- is implementation-specific. Open vSwitch will only modify
- <code>/etc/resolv.conf</code> if the DHCP response that it receives
- specifies one or more DNS servers.
- </column>
- </group>
-
<group title="Additional In-Band Configuration">
<p>These values are considered only in in-band control mode (see
- <ref column="connection_mode"/>) and only when <ref column="target"/>
- is not <code>discover</code>. (For controller discovery, the network
- configuration obtained via DHCP is used instead.)</p>
+ <ref column="connection_mode"/>).</p>
<p>When multiple controllers are configured on a single bridge, there
should be only one set of unique values in these columns. If different
unique. No common key-value pairs are currently defined.
</column>
</group>
+
+ <group title="Controller Status">
+ <column name="is_connected">
+ <code>true</code> if currently connected to this controller,
+ <code>false</code> otherwise.
+ </column>
+
+ <column name="role">
+ <p>The level of authority this controller has on the associated
+ bridge. Possible values are:</p>
+ <dl>
+ <dt><code>other</code></dt>
+ <dd>Allows the controller access to all OpenFlow features.</dd>
+ <dt><code>master</code></dt>
+ <dd>Equivalent to <code>other</code>, except that there may be at
+ most one master controller at a time. When a controller configures
+ itself as <code>master</code>, any existing master is demoted to
+ the <code>slave</code>role.</dd>
+ <dt><code>slave</code></dt>
+ <dd>Allows the controller read-only access to OpenFlow features.
+ Attempts to modify the flow table will be rejected with an
+ error. Slave controllers do not receive OFPT_PACKET_IN or
+ OFPT_FLOW_REMOVED messages, but they do receive OFPT_PORT_STATUS
+ messages.</dd>
+ </dl>
+ </column>
+
+ <column name="status">
+ <p>Key-value pairs that report controller status.</p>
+ <dl>
+ <dt><code>last_error</code></dt>
+ <dd>A human-readable description of the last error on the connection
+ to the controller; i.e. <code>strerror(errno)</code>. This key
+ will exist only if an error has occurred.</dd>
+ <dt><code>state</code></dt>
+ <dd>The state of the connection to the controller. Possible values
+ are: <code>VOID</code> (connection is disabled),
+ <code>BACKOFF</code> (attempting to reconnect at an increasing
+ period), <code>CONNECTING</code> (attempting to connect),
+ <code>ACTIVE</code> (connected, remote host responsive), and
+ <code>IDLE</code> (remote host idle, sending keep-alive). These
+ values may change in the future. They are provided only for human
+ consumption.</dd>
+ <dt><code>sec_since_connect</code></dt>
+ <dd>The amount of time since this controller last successfully
+ connected to the switch (in seconds). Value is empty if controller
+ has never successfully connected.</dd>
+ <dt><code>sec_since_disconnect</code></dt>
+ <dd>The amount of time since this controller last disconnected from
+ the switch (in seconds). Value is empty if controller has never
+ disconnected.</dd>
+ </dl>
+ </column>
+ </group>
+ </table>
+
+ <table name="Manager" title="OVSDB management connection.">
+ <p>
+ Configuration for a database connection to an Open vSwitch database
+ (OVSDB) client.
+ </p>
+
+ <p>
+ This table primarily configures the Open vSwitch database
+ (<code>ovsdb-server</code>), not the Open vSwitch switch
+ (<code>ovs-vswitchd</code>). The switch does read the table to determine
+ what connections should be treated as in-band.
+ </p>
+
+ <p>
+ The Open vSwitch database server can initiate and maintain active
+ connections to remote clients. It can also listen for database
+ connections.
+ </p>
+
+ <group title="Core Features">
+ <column name="target">
+ <p>Connection method for managers.</p>
+ <p>
+ The following connection methods are currently supported:
+ </p>
+ <dl>
+ <dt><code>ssl:<var>ip</var></code>[<code>:<var>port</var></code>]</dt>
+ <dd>
+ <p>
+ The specified SSL <var>port</var> (default: 6632) on the host at
+ the given <var>ip</var>, which must be expressed as an IP address
+ (not a DNS name). The <ref table="Open_vSwitch" column="ssl"/>
+ column in the <ref table="Open_vSwitch"/> table must point to a
+ valid SSL configuration when this form is used.
+ </p>
+ <p>
+ SSL support is an optional feature that is not always built as
+ part of Open vSwitch.
+ </p>
+ </dd>
+
+ <dt><code>tcp:<var>ip</var></code>[<code>:<var>port</var></code>]</dt>
+ <dd>
+ The specified TCP <var>port</var> (default: 6632) on the host at
+ the given <var>ip</var>, which must be expressed as an IP address
+ (not a DNS name).
+ </dd>
+ <dt><code>pssl:</code>[<var>port</var>][<code>:<var>ip</var></code>]</dt>
+ <dd>
+ <p>
+ Listens for SSL connections on the specified TCP <var>port</var>
+ (default: 6632). If <var>ip</var>, which must be expressed as an
+ IP address (not a DNS name), is specified, then connections are
+ restricted to the specified local IP address.
+ </p>
+ <p>
+ The <ref table="Open_vSwitch" column="ssl"/> column in the <ref
+ table="Open_vSwitch"/> table must point to a valid SSL
+ configuration when this form is used.
+ </p>
+ <p>
+ SSL support is an optional feature that is not always built as
+ part of Open vSwitch.
+ </p>
+ </dd>
+ <dt><code>ptcp:</code>[<var>port</var>][<code>:<var>ip</var></code>]</dt>
+ <dd>
+ Listens for connections on the specified TCP <var>port</var>
+ (default: 6632). If <var>ip</var>, which must be expressed as an
+ IP address (not a DNS name), is specified, then connections are
+ restricted to the specified local IP address.
+ </dd>
+ </dl>
+ <p>When multiple managers are configured, the <ref column="target"/>
+ values must be unique. Duplicate <ref column="target"/> values yield
+ unspecified results.</p>
+ </column>
+
+ <column name="connection_mode">
+ <p>
+ If it is specified, this setting must be one of the following strings
+ that describes how Open vSwitch contacts this OVSDB client over the
+ network:
+ </p>
+
+ <dl>
+ <dt><code>in-band</code></dt>
+ <dd>
+ In this mode, this connection's traffic travels over a bridge
+ managed by Open vSwitch. With this setting, Open vSwitch allows
+ traffic to and from the client regardless of the contents of the
+ OpenFlow flow table. (Otherwise, Open vSwitch would never be able
+ to connect to the client, because it did not have a flow to enable
+ it.) This is the most common connection mode because it is not
+ necessary to maintain two independent networks.
+ </dd>
+ <dt><code>out-of-band</code></dt>
+ <dd>
+ In this mode, the client's traffic uses a control network separate
+ from that managed by Open vSwitch, that is, Open vSwitch does not
+ use any of its own network devices to communicate with the client.
+ The control network must be configured separately, before or after
+ <code>ovs-vswitchd</code> is started.
+ </dd>
+ </dl>
+
+ <p>
+ If not specified, the default is implementation-specific.
+ </p>
+ </column>
+ </group>
+
+ <group title="Client Failure Detection and Handling">
+ <column name="max_backoff">
+ Maximum number of milliseconds to wait between connection attempts.
+ Default is implementation-specific.
+ </column>
+
+ <column name="inactivity_probe">
+ Maximum number of milliseconds of idle time on connection to the client
+ before sending an inactivity probe message. If Open vSwitch does not
+ communicate with the client for the specified number of seconds, it
+ will send a probe. If a response is not received for the same
+ additional amount of time, Open vSwitch assumes the connection has been
+ broken and attempts to reconnect. Default is implementation-specific.
+ A value of 0 disables inactivity probes.
+ </column>
+ </group>
+
+ <group title="Other Features">
+ <column name="external_ids">
+ Key-value pairs for use by external frameworks that integrate with Open
+ vSwitch, rather than by Open vSwitch itself. System integrators should
+ either use the Open vSwitch development mailing list to coordinate on
+ common key-value definitions, or choose key names that are likely to be
+ unique. No common key-value pairs are currently defined.
+ </column>
+ </group>
+
+ <group title="Status">
+ <column name="is_connected">
+ <code>true</code> if currently connected to this manager,
+ <code>false</code> otherwise.
+ </column>
+
+ <column name="status">
+ <p>Key-value pairs that report manager status.</p>
+ <dl>
+ <dt><code>last_error</code></dt>
+ <dd>A human-readable description of the last error on the connection
+ to the manager; i.e. <code>strerror(errno)</code>. This key
+ will exist only if an error has occurred.</dd>
+ </dl>
+ <dl>
+ <dt><code>state</code></dt>
+ <dd>The state of the connection to the manager. Possible values
+ are: <code>VOID</code> (connection is disabled),
+ <code>BACKOFF</code> (attempting to reconnect at an increasing
+ period), <code>CONNECTING</code> (attempting to connect),
+ <code>ACTIVE</code> (connected, remote host responsive), and
+ <code>IDLE</code> (remote host idle, sending keep-alive). These
+ values may change in the future. They are provided only for human
+ consumption.</dd>
+ </dl>
+ <dl>
+ <dt><code>sec_since_connect</code></dt>
+ <dd>The amount of time since this manager last successfully connected
+ to the database (in seconds). Value is empty if manager has never
+ successfully connected.</dd>
+ </dl>
+ <dl>
+ <dt><code>sec_since_disconnect</code></dt>
+ <dd>The amount of time since this manager last disconnected from the
+ 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>
<table name="NetFlow">
git://git.onelab.eu / sliver-openvswitch.git / blobdiff