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32 .\" @(#)netstat.1 8.8 (Berkeley) 4/18/94
40 .Nd show network status
44 command symbolically displays the contents of various network-related
46 There are a number of output formats,
47 depending on the options for the information presented.
48 .Bl -tag -width indent
53 .Op Fl f Ar protocol_family | Fl p Ar protocol
58 Display a list of active sockets
59 (protocol control blocks)
60 for each network protocol,
68 show the address of a protocol control block (PCB)
69 associated with a socket; used for debugging.
73 show the state of all sockets;
74 normally sockets used by server processes are not shown.
78 show the size of the various listen queues.
79 The first count shows the number of unaccepted connections,
80 the second count shows the amount of unaccepted incomplete connections,
81 and the third count is the maximum number of queued connections.
85 show network addresses as numbers (as with
87 but show ports symbolically.
90 is present display full socket buffer statistics for each internet socket.
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, show the contents of watchdog timers.
130 is also present, print interface names using a wider field size.
135 .Op Fl I Ar interface
144 display the information regarding packet
145 traffic on all configured network interfaces
150 is also present, show the number of dropped packets.
156 .Op Fl f Ar protocol_family | Fl p Ar protocol
161 Display system-wide statistics for each network protocol,
163 .Ar protocol_family ,
168 is repeated, counters with a value of zero are suppressed.
171 is also present, reset statistic counters after displaying them.
175 .Fl i | I Ar interface Fl s
176 .Op Fl f Ar protocol_family | Fl p Ar protocol
181 Display per-interface statistics for each network protocol,
183 .Ar protocol_family ,
194 Show statistics recorded by the memory management routines
196 The network manages a private pool of memory buffers.
201 .Op Fl I Ar interface
204 Show statistics about
207 This includes information like
208 how many packets have been matched, dropped and received by the
209 bpf device, also information about current buffer sizes and device
216 .Op Fl f Ar address_family
221 Display the contents of all routing tables,
222 or a routing table for a particular
227 show the contents of the internal Patricia tree
228 structures; used for debugging.
232 show protocol-cloned routes
233 (routes generated by an
236 normally these routes are not shown.
254 Display routing statistics.
257 is repeated, counters with a value of zero are suppressed.
263 .Op Fl f Ar address_family
268 Show information related to multicast (group address) routing.
269 By default, show the IP Multicast virtual-interface and routing tables,
270 and multicast group memberships.
276 .Op Fl f Ar address_family
281 Show multicast routing statistics.
284 is repeated, counters with a value of zero are suppressed.
287 Some options have the general meaning:
289 .It Fl f Ar address_family , Fl p Ar protocol
290 Limit display to those records
295 The following address families and protocols are recognized:
297 .Bl -tag -width ".Cm netgraph , ng Pq Dv AF_NETGRAPH" -compact
300 .It Cm inet Pq Dv AF_INET
301 .Cm divert , icmp , igmp , ip , ipsec , pim, sctp , tcp , udp
302 .It Cm inet6 Pq Dv AF_INET6
303 .Cm icmp6 , ip6 , ipsec6 , rip6 , tcp , udp
304 .It Cm pfkey Pq Dv PF_KEY
306 .It Cm atalk Pq Dv AF_APPLETALK
308 .It Cm netgraph , ng Pq Dv AF_NETGRAPH
310 .It Cm ipx Pq Dv AF_IPX
312 .\".It Cm ns Pq Dv AF_NS
313 .\".Cm idp , ns_err , spp
314 .\".It Cm iso Pq Dv AF_ISO
315 .\".Cm clnp , cltp , esis , tp
316 .It Cm unix Pq Dv AF_UNIX
317 .It Cm link Pq Dv AF_LINK
320 The program will complain if
322 is unknown or if there is no statistics routine for it.
324 Extract values associated with the name list from the specified core
325 instead of the default
328 Extract the name list from the specified system instead of the default,
329 which is the kernel image the system has booted from.
331 Show network addresses and ports as numbers.
334 attempts to resolve addresses and ports,
335 and display them symbolically.
337 In certain displays, avoid truncating addresses even if this causes
338 some fields to overflow.
341 The default display, for active sockets, shows the local
342 and remote addresses, send and receive queue sizes (in bytes), protocol,
343 and the internal state of the protocol.
344 Address formats are of the form
348 if a socket's address specifies a network but no specific host address.
349 When known, the host and network addresses are displayed symbolically
350 according to the databases
355 If a symbolic name for an address is unknown, or if
358 option is specified, the address is printed numerically, according
359 to the address family.
360 For more information regarding
368 addresses and ports appear as
371 The interface display provides a table of cumulative
372 statistics regarding packets transferred, errors, and collisions.
373 The network addresses of the interface
374 and the maximum transmission unit
378 The routing table display indicates the available routes and their status.
379 Each route consists of a destination host or network, and a gateway to use
380 in forwarding packets.
381 The flags field shows a collection of information about the route stored
383 The individual flags are discussed in more detail in the
388 The mapping between letters and flags is:
389 .Bl -column ".Li W" ".Dv RTF_WASCLONED"
390 .It Li 1 Ta Dv RTF_PROTO1 Ta "Protocol specific routing flag #1"
391 .It Li 2 Ta Dv RTF_PROTO2 Ta "Protocol specific routing flag #2"
392 .It Li 3 Ta Dv RTF_PROTO3 Ta "Protocol specific routing flag #3"
393 .It Li B Ta Dv RTF_BLACKHOLE Ta "Just discard pkts (during updates)"
394 .It Li b Ta Dv RTF_BROADCAST Ta "The route represents a broadcast address"
395 .It Li C Ta Dv RTF_CLONING Ta "Generate new routes on use"
396 .It Li c Ta Dv RTF_PRCLONING Ta "Protocol-specified generate new routes on use"
397 .It Li D Ta Dv RTF_DYNAMIC Ta "Created dynamically (by redirect)"
398 .It Li G Ta Dv RTF_GATEWAY Ta "Destination requires forwarding by intermediary"
399 .It Li H Ta Dv RTF_HOST Ta "Host entry (net otherwise)"
400 .It Li L Ta Dv RTF_LLINFO Ta "Valid protocol to link address translation"
401 .It Li M Ta Dv RTF_MODIFIED Ta "Modified dynamically (by redirect)"
402 .It Li R Ta Dv RTF_REJECT Ta "Host or net unreachable"
403 .It Li S Ta Dv RTF_STATIC Ta "Manually added"
404 .It Li U Ta Dv RTF_UP Ta "Route usable"
405 .It Li W Ta Dv RTF_WASCLONED Ta "Route was generated as a result of cloning"
406 .It Li X Ta Dv RTF_XRESOLVE Ta "External daemon translates proto to link address"
409 Direct routes are created for each
410 interface attached to the local host;
411 the gateway field for such entries shows the address of the outgoing interface.
412 The refcnt field gives the
413 current number of active uses of the route.
415 protocols normally hold on to a single route for the duration of
416 a connection while connectionless protocols obtain a route while sending
417 to the same destination.
418 The use field provides a count of the number of packets
419 sent using that route.
420 The interface entry indicates the network interface utilized for the route.
428 interval argument, it displays a running count of statistics related to
430 An obsolescent version of this option used a numeric parameter
431 with no option, and is currently supported for backward compatibility.
432 By default, this display summarizes information for all interfaces.
433 Information for a specific interface may be displayed with the
443 option represent the underlying parameters of the bpf peer.
445 represented as a single lower case letter.
446 The mapping between the letters and flags in order of appearance are:
448 .It Li p Ta Set if listening promiscuously
449 .It Li i Ta Dv BIOCIMMEDIATE No has been set on the device
450 .It Li f Ta Dv BIOCGHDRCMPLT No status: source link addresses are being
452 .It Li s Ta Dv BIOCGSEESENT No status: see packets originating locally and
453 remotely on the interface.
454 .It Li a Ta Packet reception generates a signal
455 .It Li l Ta Dv BIOCLOCK No status: descriptor has been locked
458 For more information about these flags, please refer to
463 flag causes netstat to output all the information recorded about data
464 stored in the socket buffers. The fields are:
465 .Bl -column ".Li R-MBUF"
466 .It Li R-MBUF Ta Number of mbufs in the receive queue.
467 .It Li S-MBUF Ta Number of mbufs in the send queue.
468 .It Li R-CLUS Ta Number of clusters, of any type, in the recieve
470 .It Li S-CLUS Ta Number of clusters, of any type, in the send queue.
471 .It Li R-HIWA Ta Receive buffer high water mark, in bytes.
472 .It Li S-HIWA Ta Send buffer high water mark, in bytes.
473 .It Li R-LOWA Ta Receive buffer low water mark, in bytes.
474 .It Li S-LOWA Ta Send buffer low water mark, in bytes.
475 .It Li R-BCNT Ta Receive buffer byte count.
476 .It Li S-BCNT Ta Send buffer byte count.
477 .It Li R-BMAX Ta Maximum bytes that can be used in the receive buffer.
478 .It Li S-BMAX Ta Maximum bytes that can be used in the send buffer.
504 IPv6 support was added by WIDE/KAME project.
506 The notion of errors is ill-defined.
projects / FreeBSD / FreeBSD.git / blob