NAME

       ip-stats - manage and show interface statistics

SYNOPSIS

       ip stats  { COMMAND | help }

       ip stats show [ dev DEV ] [ group GROUP [ subgroup SUBGROUP  [ suite  SUITE ] ... ] ... ] ...

       ip stats set dev DEV l3_stats { on | off }

DESCRIPTION

       ip stats set
              is used for toggling whether a certain HW statistics suite is collected on a given netdevice. The
              following statistics suites are supported:

              l3_stats L3 stats reflect traffic that takes place in a HW device on an object that corresponds to
                     the given software netdevice.

       ip stats show
              is used for showing stats on a given netdevice, or dumping statistics across all netdevices. By
              default, all stats are requested. It is possible to filter which stats are requested by using the
              group and subgroup keywords.

              It is possible to specify several groups, or several subgroups for one group. When no subgroups
              are given for a group, all the subgroups are requested.

              The following groups are recognized:

              group link - Link statistics. The same suite that "ip -s link show" shows.

              group offload - A group that contains a number of HW-oriented statistics. See below for individual
                     subgroups within this group.

              group xstats - Extended statistics. A subgroup identifies the type of netdevice to show the
                     statistics for.

              group xstats_slave - Extended statistics for the slave of a netdevice of a given type. A subgroup
                     identifies the type of master netdevice.

              group afstats - A group for address-family specific netdevice statistics.

       group offload subgroups:

              subgroup cpu_hit - The cpu_hit statistics suite is useful on hardware netdevices. The link
                     statistics on these devices reflect both the hardware- and software-datapath traffic. The
                     cpu_hit statistics then only reflect software-datapath traffic.

              subgroup hw_stats_info - This suite does not include traffic statistics, but rather communicates
                     the state of other statistics. Through this subgroup, it is possible to discover whether a
                     given statistic was enabled, and when it was, whether any device driver actually configured
                     its device to collect these statistics. For example, l3_stats was enabled in the following
                     case, but no driver has installed it:

                     # ip stats show dev swp1 group offload subgroup hw_stats_info
                     56: swp1: group offload subgroup hw_stats_info
                         l3_stats on used off

                     After an L3 address is added to the netdevice, the counter will be installed:

                     # ip addr add dev swp1 192.0.2.1/28
                     # ip stats show dev swp1 group offload subgroup hw_stats_info
                     56: swp1: group offload subgroup hw_stats_info
                         l3_stats on used on

              subgroup l3_stats - These statistics reflect L3 traffic that takes place in HW on an object that
                     corresponds to the netdevice. Note that this suite is disabled by default and needs to be
                     first enabled through ip stats set.

                     For example:

                     # ip stats show dev swp2.200 group offload subgroup l3_stats
                     112: swp2.200: group offload subgroup l3_stats on used on
                         RX:  bytes packets errors dropped   mcast
                               8900      72      2       0       3
                         TX:  bytes packets errors dropped
                               7176      58      0       0

                     Note how the l3_stats_info for the selected group is also part of the dump.

       group xstats and group xstats_slave subgroups:

              subgroup bridge [ suite stp ] [ suite mcast ] - Statistics for STP and, respectively, IGMP / MLD
                     (under the keyword mcast) traffic on bridges and their slaves.

              subgroup bond [ suite 802.3ad ] - Statistics for LACP traffic on bond devices and their slaves.

       group afstats subgroups:

              subgroup mpls - Statistics for MPLS traffic seen on the netdevice. For example:

                     # ip stats show dev veth01 group afstats subgroup mpls
                     3: veth01: group afstats subgroup mpls
                         RX: bytes packets errors dropped noroute
                                 0       0      0       0       0
                         TX: bytes packets errors dropped
                               216       2      0       0

EXAMPLES

       # ip stats set dev swp1 l3_stats on
              Enables collection of L3 HW statistics on swp1.

       # ip stats show group offload
              Shows all offload statistics on all netdevices.

       # ip stats show dev swp1 group link
              Shows link statistics on the given netdevice.

SEE ALSO

       ip(8), ip-link(8),

AUTHOR

       Manpage by Petr Machata.