Provided by: iproute2_4.3.0-1ubuntu3_i386 bug

NAME

       lnstat - unified linux network statistics

SYNOPSIS

       lnstat [options]

DESCRIPTION

       This manual page documents briefly the lnstat command.

       lnstat  is  a generalized and more feature-complete replacement for the
       old rtstat program.  It  is  commonly  used  to  periodically  print  a
       selection of statistical values exported by the kernel.  In addition to
       routing cache statistics, it supports any kind of statistics the  linux
       kernel exports via a file in /proc/net/stat/.

       Each  file in /proc/net/stat/ contains a header line listing the column
       names.  These names are used by lnstat  as  keys  for  selecting  which
       statistics  to  print.  For  every  CPU  present  in the system, a line
       follows which lists the actual values for  each  column  of  the  file.
       lnstat  sums  these  values  up  (which  in  fact  are counters) before
       printing them. After each interval, only the  difference  to  the  last
       value is printed.

       Files and columns may be selected by using the -f and -k parameters. By
       default, all columns of all files are printed.

OPTIONS

       lnstat supports the following options.

       -h, --help
              Show summary of options.

       -V, --version
              Show version of program.

       -c, --count <count>
              Print <count> number of intervals.

       -d, --dump
              Dump list of available files/keys.

       -f, --file <file>
              Statistics file to use, may  be  specified  multiple  times.  By
              default all files in /proc/net/stat are scanned.

       -i, --interval <intv>
              Set interval to 'intv' seconds.

       -j, --json
              Display results in JSON format

       -k, --keys k,k,k,...
              Display  only  keys  specified.  Each  key  k  is  of  the  form
              [file:]key. If <file> is given, the search for the given key  is
              limited  to  that  file. Otherwise the first file containing the
              searched key is being used.

       -s, --subject [0-2]
              Specify display of subject/header. '0' means no header  at  all,
              '1'  prints a header only at start of the program and '2' prints
              a header every 20 lines.

       -w, --width n,n,n,...
              Width for each field.

USAGE EXAMPLES

       # lnstat -d
              Get a list of supported statistics files.

       # lnstat -k arp_cache:entries,rt_cache:in_hit,arp_cache:destroys
              Select the specified files and keys.

       # lnstat -i 10
              Use an interval of 10 seconds.

       # lnstat -f ip_conntrack
              Use only the specified file for statistics.

       # lnstat -s 0
              Do not print a header at all.

       # lnstat -s 20
              Print a header at start and every 20 lines.

       # lnstat -c -1 -i 1 -f rt_cache -k entries,in_hit,in_slow_tot
              Display statistics for keys entries, in_hit and  in_slow_tot  of
              field rt_cache every second.

FILES

       /proc/net/stat/arp_cache, /proc/net/stat/ndisc_cache
              Statistics around neighbor cache and ARP. arp_cache is for IPv4,
              ndisc_cache is the same for IPv6.

              entries Number of entries in the neighbor table.

              allocs How many neighbor entries have been allocated.

              destroys How many neighbor entries have been removed.

              hash_grows How often the neighbor (hash) table was increased.

              lookups How many lookups were performed.

              hits How many lookups were successful.

              res_failed How many neighbor lookups failed.

              rcv_probes_mcast How many multicast neighbor solicitations  were
              received. (IPv6 only.)

              rcv_probes_ucast  How  many  unicast neighbor solicitations were
              received. (IPv6 only.)

              periodic_gc_runs How many garbage collection runs were executed.

              forced_gc_runs How many  forced  garbage  collection  runs  were
              executed.  Happens  when  adding  an  entry and the table is too
              full.

              unresolved_discards  How  many  neighbor  table   entries   were
              discarded due to lookup failure.

              table_fulls  Number of table overflows. Happens if table is full
              and forced GC run (see forced_gc_runs) has failed.

       /proc/net/stat/ip_conntrack, /proc/net/stat/nf_conntrack
              Conntrack  related  counters.  ip_conntrack  is  for   backwards
              compatibility  with older userspace only and shows the same data
              as nf_conntrack.

              entries Number of entries in conntrack table.

              searched Number of conntrack table lookups performed.

              found Number of searched entries which were successful.

              new Number of conntrack entries added which  were  not  expected
              before.

              invalid Number of packets seen which can not be tracked.

              ignore  Number  of packets seen which are already connected to a
              conntrack entry.

              delete Number of conntrack entries which were removed.

              delete_list Number of conntrack entries which were put to  dying
              list.

              insert Number of entries inserted into the list.

              insert_failed  Number  of  entries  for which list insertion was
              attempted but failed (happens  if  the  same  entry  is  already
              present).

              drop  Number of packets dropped due to conntrack failure. Either
              new  conntrack  entry  allocation  failed,  or  protocol  helper
              dropped the packet.

              early_drop  Number of dropped conntrack entries to make room for
              new ones, if maximum table size was reached.

              icmp_error Number of packets wich could not be  tracked  due  to
              error situation. This is a subset of invalid.

              expect_new   Number   of   conntrack   entries  added  after  an
              expectation for them was already present.

              expect_create Number of expectations added.

              expect_delete Number of expectations deleted.

              search_restart Number of conntrack table lookups which had to be
              restarted due to hashtable resizes.

       /proc/net/stat/rt_cache
              Routing cache statistics.

              entries Number of entries in routing cache.

              in_hit   Number  of  route  cache  hits  for  incoming  packets.
              Deprecated since IP route cache removal, therefore always zero.

              in_slow_tot Number of routing  cache  entries  added  for  input
              traffic.

              in_slow_mc  Number  of multicast routing cache entries added for
              input traffic.

              in_no_route Number of input packets for which no  routing  table
              entry was found.

              in_brd Number of matched input broadcast packets.

              in_martian_dst Number of incoming martian destination packets.

              in_martian_src Number of incoming martian source packets.

              out_hit  Number  of  route  cache  hits  for  outgoing  packets.
              Deprecated since IP route cache removal, therefore always zero.

              out_slow_tot Number of routing cache entries  added  for  output
              traffic.

              out_slow_mc  Number of multicast routing cache entries added for
              output traffic.

              gc_total Total number of  garbage  collection  runs.  Deprecated
              since IP route cache removal, therefore always zero.

              gc_ignored  Number  of  ignored  garbage  collection runs due to
              minimum GC interval not reached  and  routing  cache  not  full.
              Deprecated since IP route cache removal, therefore always zero.

              gc_goal_miss Number of garbage collector goal misses. Deprecated
              since IP route cache removal, therefore always zero.

              gc_dst_overflow   Number   of   destination   cache   overflows.
              Deprecated since IP route cache removal, therefore always zero.

              in_hlist_search  Number  of hash table list traversals for input
              traffic. Deprecated since  IP  route  cache  removal,  therefore
              always zero.

              out_hlist_search Number of hash table list traversals for output
              traffic. Deprecated since  IP  route  cache  removal,  therefore
              always zero.

SEE ALSO

       ip(8),  and  /usr/share/doc/iproute-doc/README.lnstat (package iproute-
       doc on Debian)

AUTHOR

       lnstat was written by Harald Welte <laforge@gnumonks.org>.

       This manual page was written by Michael Prokop <mika@grml.org> for  the
       Debian project (but may be used by others).

                                                                     LNSTAT(8)