choose key names that are likely to be unique. The currently
defined common key-value pairs are:
<dl>
- <dt><code>system-uuid</code></dt>
- <dd>A universally 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 is the host
- UUID displayed by, e.g., <code>xe host-list</code>.</dd>
+ <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>
+ <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>
</dl>
</column>
</group>
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. The currently
- defined common key-value pairs are:
+ defined key-value pairs are:
<dl>
- <dt><code>network-uuids</code></dt>
+ <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>
+ <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. The form of the
- identifier(s) depends on the type of the host. On a Citrix
- XenServer host, the network identifiers are RFC 4122 UUIDs as
+ the network with which this bridge is associated on a Citrix
+ XenServer host. The network identifiers are RFC 4122 UUIDs as
displayed by, e.g., <code>xe network-list</code>.</dd>
</dl>
</column>
<dt><code>tap</code></dt>
<dd>A TUN/TAP device managed by Open vSwitch.</dd>
<dt><code>gre</code></dt>
- <dd>An Ethernet over RFC 1702 Generic Routing Encapsulation over IPv4
+ <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 arguments
- are:
+ 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>
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 absense of an action). The ovs-ofctl manual
+ 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>
<dl>
<dt><code>csum</code></dt>
- <dd>Optional. Compute GRE checksums for outgoing packets and
- require checksums for incoming packets. Default is enabled,
- set to <code>false</code> to disable.</dd>
+ <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>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. It
+ also forces the encapsulating packet DF bit to be set (it is
+ always set if the inner packet implies path MTU discovery).
+ 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>
+ <dd>Ethernet tunneling over the UDP transport portion of CAPWAP
+ (RFC 5415). This allows interoperability with certain switches
+ 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
+ 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:
+ <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>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>pmtud</code></dt>
</dl>
</dd>
<dt><code>patch</code></dt>
- <dd>A pair of virtual devices that act as a patch cable. A
- <code>peer</code> argument is required that indicates the name
- of the other side of the patch. Since a patch must work in
- pairs, a second patch interface must be declared with the
- <code>name</code> and <code>peer</code> arguments reversed.</dd>
+ <dd>
+ <p>
+ A pair of virtual devices that act as a patch cable. The <ref
+ column="options"/> column must have the following key-value pair:
+ </p>
+ <dl>
+ <dt><code>peer</code></dt>
+ <dd>
+ The <ref column="name"/> of the <ref table="Interface"/> for
+ the other side of the patch. The named <ref
+ table="Interface"/>'s own <code>peer</code> option must specify
+ this <ref table="Interface"/>'s name. That is, the two patch
+ interfaces must have reversed <ref column="name"/> and
+ <code>peer</code> values.
+ </dd>
+ </dl>
+ </dd>
</dl>
</column>
Configuration options whose interpretation varies based on
<ref column="type"/>.
</column>
+
+ <column name="status">
+ <p>
+ Key-value pairs that report port status. Supported status
+ values are <code>type</code>-dependent.
+ </p>
+ <p>The only currently defined key-value pair is:</p>
+ <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>
+ </dl>
+ </column>
</group>
<group title="Ingress Policing">
<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. The currently
+ defined common key-value pair is:
+ <dl>
+ <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>
+ </dl>
<p>
- 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.
- </p>
- <p>
- All of the currently defined key-value pairs specifically
+ Additionally the following key-value pairs specifically
apply to an interface that represents a virtual Ethernet interface
connected to a virtual machine. These key-value pairs should not be
present for other types of interfaces. Keys whose names end
UUIDs in RFC 4122 format. Other hypervisors may use other
formats.
</p>
- <p>The currently defined key-value pairs are:</p>
+ <p>The currently defined key-value pairs for XenServer are:</p>
<dl>
- <dt><code>vif-uuid</code></dt>
+ <dt><code>xs-vif-uuid</code></dt>
<dd>The virtual interface associated with this interface.</dd>
- <dt><code>network-uuid</code></dt>
+ <dt><code>xs-network-uuid</code></dt>
<dd>The virtual network to which this interface is attached.</dd>
- <dt><code>vm-uuid</code></dt>
+ <dt><code>xs-vm-uuid</code></dt>
<dd>The VM to which this interface belongs.</dd>
- <dt><code>vif-mac</code></dt>
+ <dt><code>xs-vif-mac</code></dt>
<dd>The MAC address programmed into the "virtual hardware" for this
interface, in the
form <var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>:<var>xx</var>.
<table name="Controller" title="OpenFlow controller configuration.">
<p>An OpenFlow controller.</p>
- <p>Open vSwitch permits a bridge to have any number of OpenFlow
- controllers. When multiple controllers are configured, Open vSwitch
- connects to all of them simultaneously. OpenFlow 1.0 does not specify
- how multiple controllers coordinate in interacting with a single switch,
- so more than one controller should be specified only if the controllers
- are themselves designed to coordinate with each other.</p>
+ <p>
+ Open vSwitch supports two kinds of OpenFlow controllers:
+ </p>
+
+ <dl>
+ <dt>Primary controllers</dt>
+ <dd>
+ <p>
+ This is the kind of controller envisioned by the OpenFlow 1.0
+ specification. Usually, a primary controller implements a network
+ policy by taking charge of the switch's flow table.
+ </p>
+
+ <p>
+ Open vSwitch initiates and maintains persistent connections to
+ primary controllers, retrying the connection each time it fails or
+ drops. The <ref table="Bridge" column="fail_mode"/> column in the
+ <ref table="Bridge"/> table applies to primary controllers.
+ </p>
+
+ <p>
+ Open vSwitch permits a bridge to have any number of primary
+ controllers. When multiple controllers are configured, Open
+ vSwitch connects to all of them simultaneously. Because
+ OpenFlow 1.0 does not specify how multiple controllers
+ coordinate in interacting with a single switch, more than
+ one primary controller should be specified only if the
+ controllers are themselves designed to coordinate with each
+ other. (The Nicira-defined <code>NXT_ROLE</code> OpenFlow
+ vendor extension may be useful for this.)
+ </p>
+ </dd>
+ <dt>Service controllers</dt>
+ <dd>
+ <p>
+ These kinds of OpenFlow controller connections are intended for
+ occasional support and maintenance use, e.g. with
+ <code>ovs-ofctl</code>. Usually a service controller connects only
+ briefly to inspect or modify some of a switch's state.
+ </p>
+
+ <p>
+ Open vSwitch listens for incoming connections from service
+ controllers. The service controllers initiate and, if necessary,
+ maintain the connections from their end. The <ref table="Bridge"
+ column="fail_mode"/> column in the <ref table="Bridge"/> table does
+ not apply to service controllers.
+ </p>
+
+ <p>
+ Open vSwitch supports configuring any number of service controllers.
+ </p>
+ </dd>
+ </dl>
+
+ <p>
+ The <ref column="target"/> determines the type of controller.
+ </p>
<group title="Core Features">
<column name="target">
- <p>Connection method for controller.
- The following connection methods are currently
- supported:</p>
+ <p>Connection method for controller.</p>
+ <p>
+ The following connection methods are currently supported for primary
+ controllers:
+ </p>
<dl>
<dt><code>ssl:<var>ip</var></code>[<code>:<var>port</var></code>]</dt>
<dd>
<p>The specified SSL <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). The <ref table="Open_vSwitch" column="ssl"/>
- column in the <ref table="Open_vSwitch"/> must point to a valid
- SSL configuration when this form is used.</p>
+ 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>
used only for bootstrapping the OpenFlow PKI at initial switch
setup; <code>ovs-vswitchd</code> does not use it at all.</p>
</dd>
- <dt><code>none</code></dt>
- <dd>Disables the controller.</dd>
+ </dl>
+ <p>
+ The following connection methods are currently supported for service
+ controllers:
+ </p>
+ <dl>
+ <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: 6633). 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: 6633). 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 controllers are configured for a single bridge, the
<ref column="target"/> values must be unique. Duplicate
git://git.onelab.eu / sliver-openvswitch.git / blobdiff