. ns
. IP "\\$1"
..
-.TH ovs\-vswitchd 8 "June 2009" "Open vSwitch" "Open vSwitch Manual"
+.TH ovs\-vswitchd 8 "@VERSION@" "Open vSwitch" "Open vSwitch Manual"
+.\" This program's name:
.ds PN ovs\-vswitchd
.
.SH NAME
ovs\-vswitchd \- Open vSwitch daemon
.
.SH SYNOPSIS
-.B ovs\-vswitchd
-\fIdatabase\fR
+\fBovs\-vswitchd \fR[\fIdatabase\fR]
.
.SH DESCRIPTION
-A daemon that manages and controls any number of Open vSwitch switches
+A daemon that manages and controls any number of Open vSwitch switches
on the local machine.
.PP
-The mandatory \fIdatabase\fR argument specifies the
-\fBovsdb\-server\fR from which \fBovs\-vswitchd\fR's configuration
-should be retrieved. It takes one of the following forms:
+The \fIdatabase\fR argument specifies how \fBovs\-vswitchd\fR connects
+to \fBovsdb\-server\fR. The default is \fBunix:@RUNDIR@/db.sock\fR.
+The following forms are accepted:
.so ovsdb/remote-active.man
+.so ovsdb/remote-passive.man
.PP
\fBovs\-vswitchd\fR retrieves its configuration from \fIdatabase\fR at
startup. It sets up Open vSwitch datapaths and then operates
the database changes, \fBovs\-vswitchd\fR automatically updates its
configuration to match.
.PP
-Upon receipt of a SIGHUP signal, \fBovs\-vswitchd\fR reopens its log
-file, if one was specified on the command line.
-.PP
-\fBovs\-vswitchd\fR switches may be configured with any of the following
+\fBovs\-vswitchd\fR switches may be configured with any of the following
features:
.
.IP \(bu
the Open vSwitch kernel module.
.PP
.SH OPTIONS
-.IP "\fB--fake-proc-net\fR"
-Causes \fBovs\-vswitchd\fR to simulate some files in \fB/proc/net/vlan\fR
-and \fB/proc/net/bonding\fR that some legacy software expects to
-exist. This option should only be used if such legacy software is
-actually in use. It requires the \fBbrcompat_mod.ko\fR kernel module
-to be loaded.
+.IP "\fB\-\-mlockall\fR"
+Causes \fBovs\-vswitchd\fR to call the \fBmlockall()\fR function, to
+attempt to lock all of its process memory into physical RAM,
+preventing the kernel from paging any of its memory to disk. This
+helps to avoid networking interruptions due to system memory pressure.
+.IP
+Some systems do not support \fBmlockall()\fR at all, and other systems
+only allow privileged users, such as the superuser, to use it.
+\fBovs\-vswitchd\fR emits a log message if \fBmlockall()\fR is
+unavailable or unsuccessful.
+.
+.IP "\fB\-\-enable\-of14\fR"
+Specifying this option allows OpenFlow 1.4 to be used if it is enabled
+through the \fBprotocols\fR column in the \fBController\fR. Without
+this option, \fBovs\-vswitchd\fR will not use OpenFlow 1.4 even if it
+is enabled that way. This option is present because OpenFlow 1.4
+support is not safe: the daemon will abort when certain unimplemented
+features are tested. Thus, for now it is suitable only for
+experimental use. When the support is implemented safely, this option
+will be removed.
.
+.SS "Daemon Options"
+.ds DD \
+\fBovs\-vswitchd\fR detaches only after it has connected to the \
+database, retrieved the initial configuration, and set up that \
+configuration.
.so lib/daemon.man
+.SS "Service Options"
+.so lib/service.man
.SS "Public Key Infrastructure Options"
.so lib/ssl.man
.so lib/ssl-bootstrap.man
.so lib/vlog.man
.so lib/common.man
-.so lib/leak-checker.man
.
.SH "RUNTIME MANAGEMENT COMMANDS"
\fBovs\-appctl\fR(8) can send commands to a running
\fBovs\-vswitchd\fR process. The currently supported commands are
described below. The command descriptions assume an understanding of
how to configure Open vSwitch.
+.SS "GENERAL COMMANDS"
+.IP "\fBexit\fR"
+Causes \fBovs\-vswitchd\fR to gracefully terminate.
+.IP "\fBqos/show\fR \fIinterface\fR"
+Queries the kernel for Quality of Service configuration and statistics
+associated with the given \fIinterface\fR.
+.IP "\fBbfd/show\fR [\fIinterface\fR]"
+Displays detailed information about Bidirectional Forwarding Detection
+configured on \fIinterface\fR. If \fIinterface\fR is not specified,
+then displays detailed information about all interfaces with BFD
+enabled.
+.IP "\fBbfd/set-forwarding\fR [\fIinterface\fR] \fIstatus\fR"
+Force the fault status of the BFD module on \fIinterface\fR (or all
+interfaces if none is given) to be \fIstatus\fR. \fIstatus\fR can be
+"true", "false", or "normal" which reverts to the standard behavior.
+.IP "\fBcfm/show\fR [\fIinterface\fR]"
+Displays detailed information about Connectivity Fault Management
+configured on \fIinterface\fR. If \fIinterface\fR is not specified,
+then displays detailed information about all interfaces with CFM
+enabled.
+.IP "\fBcfm/set-fault\fR [\fIinterface\fR] \fIstatus\fR"
+Force the fault status of the CFM module on \fIinterface\fR (or all
+interfaces if none is given) to be \fIstatus\fR. \fIstatus\fR can be
+"true", "false", or "normal" which reverts to the standard behavior.
+.IP "\fBstp/tcn\fR [\fIbridge\fR]"
+Forces a topology change event on \fIbridge\fR if it's running STP. This
+may cause it to send Topology Change Notifications to its peers and flush
+its MAC table.. If no \fIbridge\fR is given, forces a topology change
+event on all bridges.
.SS "BRIDGE COMMANDS"
These commands manage bridges.
+.IP "\fBfdb/flush\fR [\fIbridge\fR]"
+Flushes \fIbridge\fR MAC address learning table, or all learning tables
+if no \fIbridge\fR is given.
.IP "\fBfdb/show\fR \fIbridge\fR"
Lists each MAC address/VLAN pair learned by the specified \fIbridge\fR,
along with the port on which it was learned and the age of the entry,
in seconds.
+.IP "\fBbridge/reconnect\fR [\fIbridge\fR]"
+Makes \fIbridge\fR drop all of its OpenFlow controller connections and
+reconnect. If \fIbridge\fR is not specified, then all bridges drop
+their controller connections and reconnect.
+.IP
+This command might be useful for debugging OpenFlow controller issues.
.
-.IP "\fBbridge/dump-flows\fR \fIbridge\fR"
+.IP "\fBbridge/dump\-flows\fR \fIbridge\fR"
Lists all flows in \fIbridge\fR, including those normally hidden to
-commands such as \fBovs-ofctl dump-flows\fR. Flows set up by mechanisms
+commands such as \fBovs\-ofctl dump\-flows\fR. Flows set up by mechanisms
such as in-band control and fail-open are hidden from the controller
since it is not allowed to modify or override them.
.SS "BOND COMMANDS"
These commands manage bonded ports on an Open vSwitch's bridges. To
understand some of these commands, it is important to understand a
-detail of the bonding implementation called ``MAC hashing.'' Instead
-of directly assigning Ethernet source addresses to slaves, the bonding
-implementation computes a function that maps an 48-bit Ethernet source
-addresses into an 8-bit value (a ``MAC hash'' value). All of the
-Ethernet addresses that map to a single 8-bit value are then assigned
-to a single slave.
+detail of the bonding implementation called ``source load balancing''
+(SLB). Instead of directly assigning Ethernet source addresses to
+slaves, the bonding implementation computes a function that maps an
+48-bit Ethernet source addresses into an 8-bit value (a ``MAC hash''
+value). All of the Ethernet addresses that map to a single 8-bit
+value are then assigned to a single slave.
.IP "\fBbond/list\fR"
Lists all of the bonds, and their slaves, on each bridge.
.
-.IP "\fBbond/show\fR \fIport\fR"
-Lists all of the bond-specific information about the given bonded
-\fIport\fR: updelay, downdelay, time until the next rebalance. Also
-lists information about each slave: whether it is enabled or disabled,
-the time to completion of an updelay or downdelay if one is in
-progress, whether it is the active slave, the MAC hashes assigned to
-the slave, and the MAC learning table entries that hash to each MAC.
+.IP "\fBbond/show\fR [\fIport\fR]"
+Lists all of the bond-specific information (updelay, downdelay, time
+until the next rebalance) about the given bonded \fIport\fR, or all
+bonded ports if no \fIport\fR is given. Also lists information about
+each slave: whether it is enabled or disabled, the time to completion
+of an updelay or downdelay if one is in progress, whether it is the
+active slave, the hashes assigned to the slave. Any LACP information
+related to this bond may be found using the \fBlacp/show\fR command.
+.
.IP "\fBbond/migrate\fR \fIport\fR \fIhash\fR \fIslave\fR"
-Assigns a given MAC hash to a new slave. \fIport\fR specifies the
-bond port, \fIhash\fR either the MAC hash to be migrated (as a decimal
-number between 0 and 255) or an Ethernet address to be hashed, and
-\fIslave\fR the new slave to be assigned.
+Only valid for SLB bonds. Assigns a given MAC hash to a new slave.
+\fIport\fR specifies the bond port, \fIhash\fR the MAC hash to be
+migrated (as a decimal number between 0 and 255), and \fIslave\fR the
+new slave to be assigned.
.IP
The reassignment is not permanent: rebalancing or fail-over will
cause the MAC hash to be shifted to a new slave in the usual
manner.
.IP
A MAC hash cannot be migrated to a disabled slave.
-.IP "\fBbond/set-active-slave\fR \fIport\fR \fIslave\fR"
+.IP "\fBbond/set\-active\-slave\fR \fIport\fR \fIslave\fR"
Sets \fIslave\fR as the active slave on \fIport\fR. \fIslave\fR must
currently be enabled.
.IP
The setting is not permanent: a new active slave will be selected
if \fIslave\fR becomes disabled.
-.IP "\fBbond/enable-slave\fR \fIport\fR \fIslave\fR"
-.IQ "\fBbond/disable-slave\fR \fIport\fR \fIslave\fR"
+.IP "\fBbond/enable\-slave\fR \fIport\fR \fIslave\fR"
+.IQ "\fBbond/disable\-slave\fR \fIport\fR \fIslave\fR"
Enables (or disables) \fIslave\fR on the given bond \fIport\fR, skipping any
updelay (or downdelay).
.IP
This setting is not permanent: it persists only until the carrier
status of \fIslave\fR changes.
-.IP "\fBbond/hash\fR \fImac\fR"
-Returns the hash value which would be used for \fImac\fR.
+.IP "\fBbond/hash\fR \fImac\fR [\fIvlan\fR] [\fIbasis\fR]"
+Returns the hash value which would be used for \fImac\fR with \fIvlan\fR
+and \fIbasis\fR if specified.
+.
+.IP "\fBlacp/show\fR [\fIport\fR]"
+Lists all of the LACP related information about the given \fIport\fR:
+active or passive, aggregation key, system id, and system priority. Also
+lists information about each slave: whether it is enabled or disabled,
+whether it is attached or detached, port id and priority, actor
+information, and partner information. If \fIport\fR is not specified,
+then displays detailed information about all interfaces with CFM
+enabled.
.
+.so ofproto/ofproto-dpif-unixctl.man
+.so ofproto/ofproto-unixctl.man
.so lib/vlog-unixctl.man
+.so lib/memory-unixctl.man
+.so lib/coverage-unixctl.man
+.
+.SH "OPENFLOW IMPLEMENTATION"
+.
+.PP
+This section documents aspects of OpenFlow for which the OpenFlow
+specification requires documentation.
+.
+.SS "Packet buffering."
+The OpenFlow specification, version 1.2, says:
+.
+.IP
+Switches that implement buffering are expected to expose, through
+documentation, both the amount of available buffering, and the length
+of time before buffers may be reused.
+.
+.PP
+Open vSwitch maintains a separate set of 256 packet buffers for each
+OpenFlow connection. Any given packet buffer is preserved until it is
+referenced by an \fBOFPT_FLOW_MOD\fR or \fBOFPT_PACKET_OUT\fR request
+or for 5 seconds, whichever comes first.
+.
+.SH "LIMITS"
+.
+.PP
+We believe these limits to be accurate as of this writing. These
+limits assume the use of the Linux kernel datapath.
+.
+.IP \(bu
+\fBovs\-vswitchd\fR started through \fBovs\-ctl\fR(8) provides a limit of 7500
+file descriptors. The limits on the number of bridges and ports is decided by
+the availability of file descriptors. With the Linux kernel datapath, creation
+of a single bridge consumes 3 file descriptors and adding a port consumes
+1 file descriptor. Performance will degrade beyond 1,024 ports per bridge due
+to fixed hash table sizing. Other platforms may have different limitations.
+.
+.IP \(bu
+2,048 MAC learning entries per bridge, by default. (This is
+configurable via \fBother\-config:mac\-table\-size\fR in the
+\fBBridge\fR table. See \fBovs\-vswitchd.conf.db\fR(5) for details.)
+.
+.IP \(bu
+Kernel flows are limited only by memory available to the kernel.
+Performance will degrade beyond 1,048,576 kernel flows per bridge with
+a 32-bit kernel, beyond 262,144 with a 64-bit kernel.
+(\fBovs\-vswitchd\fR should never install anywhere near that many
+flows.)
+.
+.IP \(bu
+OpenFlow flows are limited only by available memory. Performance is
+linear in the number of unique wildcard patterns. That is, an
+OpenFlow table that contains many flows that all match on the same
+fields in the same way has a constant-time lookup, but a table that
+contains many flows that match on different fields requires lookup
+time linear in the number of flows.
+.
+.IP \(bu
+255 ports per bridge participating in 802.1D Spanning Tree Protocol.
+.
+.IP \(bu
+32 mirrors per bridge.
+.
+.IP \(bu
+15 bytes for the name of a port. (This is a Linux kernel limitation.)
+.
.SH "SEE ALSO"
.BR ovs\-appctl (8),
-.BR ovs\-brcompatd (8),
.BR ovsdb\-server (1),
\fBINSTALL.Linux\fR in the Open vSwitch distribution.
git://git.onelab.eu / sliver-openvswitch.git / blobdiff