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28 .\" @(#)netstat.1 8.8 (Berkeley) 4/18/94
36 .Nd show network status
40 command symbolically displays the contents of various network-related
42 There are a number of output formats,
43 depending on the options for the information presented.
44 .Bl -tag -width indent
49 .Op Fl f Ar protocol_family | Fl p Ar protocol
54 Display a list of active sockets
55 (protocol control blocks)
56 for each network protocol,
64 show the address of a protocol control block (PCB)
65 associated with a socket; used for debugging.
69 show the state of all sockets;
70 normally sockets used by server processes are not shown.
74 show the size of the various listen queues.
75 The first count shows the number of unaccepted connections,
76 the second count shows the amount of unaccepted incomplete connections,
77 and the third count is the maximum number of queued connections.
81 show network addresses as numbers (as with
83 but show ports symbolically.
86 is present, display socket buffer and tcp timer statistics for each internet socket.
89 is present, display information from the TCP control block, including
90 retransmits, out-of-order packets received, and zero-sized windows advertised.
94 .Fl i | I Ar interface
96 .Op Fl f Ar address_family
101 Show the state of all network interfaces or a single
103 which have been auto-configured
104 (interfaces statically configured into a system, but not
105 located at boot time are not shown).
108 after an interface name indicates that the interface is
112 is also present, multicast addresses currently in use are shown
113 for each Ethernet interface and for each IP interface address.
114 Multicast addresses are shown on separate lines following the interface
115 address with which they are associated.
118 is also present, show the number of bytes in and out.
121 is also present, show the number of dropped packets.
124 is also present, print all counters in human readable form.
127 is also present, print interface names using a wider field size.
132 .Op Fl I Ar interface
142 display the information regarding packet
143 traffic on all configured network interfaces
148 is also present, exit after
153 is also present, show the number of dropped packets.
159 .Op Fl f Ar protocol_family | Fl p Ar protocol
164 Display system-wide statistics for each network protocol,
166 .Ar protocol_family ,
171 is repeated, counters with a value of zero are suppressed.
174 is also present, reset statistic counters after displaying them.
178 .Fl i | I Ar interface Fl s
179 .Op Fl f Ar protocol_family | Fl p Ar protocol
184 Display per-interface statistics for each network protocol,
186 .Ar protocol_family ,
197 Show statistics recorded by the memory management routines
199 The network manages a private pool of memory buffers.
205 .Op Fl I Ar interface
208 Show statistics about
211 This includes information like
212 how many packets have been matched, dropped and received by the
213 bpf device, also information about current buffer sizes and device
220 .Op Fl f Ar address_family
225 Display the contents of all routing tables,
226 or a routing table for a particular
231 show the contents of the internal Patricia tree
232 structures; used for debugging.
236 show protocol-cloned routes
237 (routes generated by an
240 normally these routes are not shown.
258 Display routing statistics.
261 is repeated, counters with a value of zero are suppressed.
267 .Op Fl f Ar address_family
272 Display the contents of the multicast virtual interface tables,
273 and multicast forwarding caches.
274 Entries in these tables will appear only when the kernel is
275 actively forwarding multicast sessions.
276 This option is applicable only to the
286 .Op Fl f Ar address_family
291 Show multicast routing statistics.
294 is repeated, counters with a value of zero are suppressed.
306 Some options have the general meaning:
308 .It Fl f Ar address_family , Fl p Ar protocol
309 Limit display to those records
314 The following address families and protocols are recognized:
316 .Bl -tag -width ".Cm netgraph , ng Pq Dv AF_NETGRAPH" -compact
319 .It Cm inet Pq Dv AF_INET
320 .Cm divert , icmp , igmp , ip , ipsec , pim, sctp , tcp , udp
321 .It Cm inet6 Pq Dv AF_INET6
322 .Cm icmp6 , ip6 , ipsec6 , rip6 , tcp , udp
323 .It Cm pfkey Pq Dv PF_KEY
325 .It Cm atalk Pq Dv AF_APPLETALK
327 .It Cm netgraph , ng Pq Dv AF_NETGRAPH
329 .It Cm ipx Pq Dv AF_IPX
331 .\".It Cm ns Pq Dv AF_NS
332 .\".Cm idp , ns_err , spp
333 .\".It Cm iso Pq Dv AF_ISO
334 .\".Cm clnp , cltp , esis , tp
335 .It Cm unix Pq Dv AF_UNIX
336 .It Cm link Pq Dv AF_LINK
339 The program will complain if
341 is unknown or if there is no statistics routine for it.
343 Extract values associated with the name list from the specified core
344 instead of the default
347 Extract the name list from the specified system instead of the default,
348 which is the kernel image the system has booted from.
350 Show network addresses and ports as numbers.
353 attempts to resolve addresses and ports,
354 and display them symbolically.
356 In certain displays, avoid truncating addresses even if this causes
357 some fields to overflow.
360 The default display, for active sockets, shows the local
361 and remote addresses, send and receive queue sizes (in bytes), protocol,
362 and the internal state of the protocol.
363 Address formats are of the form
367 if a socket's address specifies a network but no specific host address.
368 When known, the host and network addresses are displayed symbolically
369 according to the databases
374 If a symbolic name for an address is unknown, or if
377 option is specified, the address is printed numerically, according
378 to the address family.
379 For more information regarding
387 addresses and ports appear as
390 The interface display provides a table of cumulative
391 statistics regarding packets transferred, errors, and collisions.
392 The network addresses of the interface
393 and the maximum transmission unit
397 The routing table display indicates the available routes and their status.
398 Each route consists of a destination host or network, and a gateway to use
399 in forwarding packets.
400 The flags field shows a collection of information about the route stored
402 The individual flags are discussed in more detail in the
407 The mapping between letters and flags is:
408 .Bl -column ".Li W" ".Dv RTF_WASCLONED"
409 .It Li 1 Ta Dv RTF_PROTO1 Ta "Protocol specific routing flag #1"
410 .It Li 2 Ta Dv RTF_PROTO2 Ta "Protocol specific routing flag #2"
411 .It Li 3 Ta Dv RTF_PROTO3 Ta "Protocol specific routing flag #3"
412 .It Li B Ta Dv RTF_BLACKHOLE Ta "Just discard pkts (during updates)"
413 .It Li b Ta Dv RTF_BROADCAST Ta "The route represents a broadcast address"
414 .It Li C Ta Dv RTF_CLONING Ta "Generate new routes on use"
415 .It Li c Ta Dv RTF_PRCLONING Ta "Protocol-specified generate new routes on use"
416 .It Li D Ta Dv RTF_DYNAMIC Ta "Created dynamically (by redirect)"
417 .It Li G Ta Dv RTF_GATEWAY Ta "Destination requires forwarding by intermediary"
418 .It Li H Ta Dv RTF_HOST Ta "Host entry (net otherwise)"
419 .It Li L Ta Dv RTF_LLINFO Ta "Valid protocol to link address translation"
420 .It Li M Ta Dv RTF_MODIFIED Ta "Modified dynamically (by redirect)"
421 .It Li R Ta Dv RTF_REJECT Ta "Host or net unreachable"
422 .It Li S Ta Dv RTF_STATIC Ta "Manually added"
423 .It Li U Ta Dv RTF_UP Ta "Route usable"
424 .It Li W Ta Dv RTF_WASCLONED Ta "Route was generated as a result of cloning"
425 .It Li X Ta Dv RTF_XRESOLVE Ta "External daemon translates proto to link address"
428 Direct routes are created for each
429 interface attached to the local host;
430 the gateway field for such entries shows the address of the outgoing interface.
431 The refcnt field gives the
432 current number of active uses of the route.
434 protocols normally hold on to a single route for the duration of
435 a connection while connectionless protocols obtain a route while sending
436 to the same destination.
437 The use field provides a count of the number of packets
438 sent using that route.
439 The interface entry indicates the network interface utilized for the route.
447 interval argument, it displays a running count of statistics related to
449 An obsolescent version of this option used a numeric parameter
450 with no option, and is currently supported for backward compatibility.
451 By default, this display summarizes information for all interfaces.
452 Information for a specific interface may be displayed with the
462 option represent the underlying parameters of the bpf peer.
464 represented as a single lower case letter.
465 The mapping between the letters and flags in order of appearance are:
467 .It Li p Ta Set if listening promiscuously
468 .It Li i Ta Dv BIOCIMMEDIATE No has been set on the device
469 .It Li f Ta Dv BIOCGHDRCMPLT No status: source link addresses are being
471 .It Li s Ta Dv BIOCGSEESENT No status: see packets originating locally and
472 remotely on the interface.
473 .It Li a Ta Packet reception generates a signal
474 .It Li l Ta Dv BIOCLOCK No status: descriptor has been locked
477 For more information about these flags, please refer to
484 to output all the information recorded about data
485 stored in the socket buffers.
487 .Bl -column ".Li R-MBUF"
488 .It Li R-MBUF Ta Number of mbufs in the receive queue.
489 .It Li S-MBUF Ta Number of mbufs in the send queue.
490 .It Li R-CLUS Ta Number of clusters, of any type, in the receive
492 .It Li S-CLUS Ta Number of clusters, of any type, in the send queue.
493 .It Li R-HIWA Ta Receive buffer high water mark, in bytes.
494 .It Li S-HIWA Ta Send buffer high water mark, in bytes.
495 .It Li R-LOWA Ta Receive buffer low water mark, in bytes.
496 .It Li S-LOWA Ta Send buffer low water mark, in bytes.
497 .It Li R-BCNT Ta Receive buffer byte count.
498 .It Li S-BCNT Ta Send buffer byte count.
499 .It Li R-BMAX Ta Maximum bytes that can be used in the receive buffer.
500 .It Li S-BMAX Ta Maximum bytes that can be used in the send buffer.
527 IPv6 support was added by WIDE/KAME project.
529 The notion of errors is ill-defined.
projects / FreeBSD / releng / 9.0.git / blob