. 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
-.\" SSL peer program's name:
-.ds SN ovs\-controller
.
.SH NAME
ovs\-vswitchd \- Open vSwitch daemon
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
features:
.
\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
.SS "GENERAL COMMANDS"
.IP "\fBexit\fR"
Causes \fBovs\-vswitchd\fR to gracefully terminate.
-.IP "\fBcoverage/log\fR"
-Logs coverage counters at level warn.
.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]"
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/stress-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