Provided by: snmp_5.4.3~dfsg-2.4ubuntu1_amd64 bug

NAME

       snmpnetstat  -  display  networking  status  and  configuration information from a network
       entity via SNMP

SYNOPSIS

       snmpnetstat [common options] [-Ca] [-Cn] AGENT
       snmpnetstat [common options] [-Ci] [-Co] [-Cr] [-Cn] [-Cs] AGENT
       snmpnetstat [common options] [-Ci] [-Cn] [-CI interface] AGENT [interval]
       snmpnetstat [common options] [-Ca] [-Cn] [-Cs] [-Cp protocol] AGENT

DESCRIPTION

       The snmpnetstat command  symbolically  displays  the  values  of  various  network-related
       information retrieved from a remote system using the SNMP protocol.  There are a number of
       output formats, depending on the options for the information presented.  The first form of
       the  command  displays  a  list of active sockets.  The second form presents the values of
       other network-related information according to the option selected.  Using the third form,
       with  an  interval  specified,  snmpnetstat  will  continuously  display  the  information
       regarding packet traffic on the configured network interfaces.  The fourth  form  displays
       statistics about the named protocol.

       AGENT  identifies a target SNMP agent, which is instrumented to monitor the given objects.
       At its simplest, the AGENT specification will consist of a hostname or an IPv4 address. In
       this  situation,  the command will attempt communication with the agent, using UDP/IPv4 to
       port 161 of the given target host. See snmpcmd(1) for a full list of the possible  formats
       for AGENT.

OPTIONS

       The options have the following meaning:

       common options
        Please  see  snmpcmd(1) for a list of possible values for common options as well as their
       descriptions.

       -Ca With the default display, show the state of all  sockets;  normally  sockets  used  by
       server processes are not shown.

       -Ci Show the state of all of the network interfaces.  The  interface  display  provides  a
       table  of cumulative statistics regarding packets  transferred,  errors,  and  collisions.
       The   network  addresses  of the interface and the maximum transmission unit (``mtu'') are
       also displayed.

       -Co Show an abbreviated interface status, giving octets in  place  of  packets.   This  is
       useful when enquiring virtual interfaces (such as Frame-Relay circuits) on a router.

       -CI  interface  Show  information  only  about  this  interface;  used with an interval as
       described below.

       -Cn Show network addresses as  numbers  (normally  snmpnetstat  interprets  addresses  and
       attempts  to  display them symbolically).  This option may be used with any of the display
       formats.

       -Cp protocol Show statistics about protocol, which is  either  a  well-known  name  for  a
       protocol  or  an  alias  for  it.   Some protocol names and aliases are listed in the file
       /etc/protocols.  A null response typically means that there are no interesting numbers  to
       report.   The  program  will  complain if protocol is unknown or if there is no statistics
       routine for it.

       -Cs Show per-protocol statistics.  When used with the -Cr option, show routing  statistics
       instead.

       -Cr  Show  the  routing  tables.   When  -Cs  is  also  present, show per-protocol routing
       statistics instead of the routing tables.

       When  snmpnetstat is invoked with an interval argument, it displays  a  running  count  of
       statistics  related  to   network  interfaces.   interval is the number of seconds between
       reporting of statistics.

       The Active Sockets Display (default)

       The default display, for active sockets, shows the local and remote  addresses,  protocol,
       and  the  internal  state   of  the   protocol.    Address   formats   are   of  the  form
       ``host.port'' or ``network.port'' if  a  socket's  address specifies  a  network   but  no
       specific  host  address.   When  known,  the  host  and  network  addresses  are displayed
       symbolically according   to  the  data  bases /etc/hosts and /etc/networks,  respectively.
       If  a  symbolic  name  for  an address  is unknown, or if the -Cn option is specified, the
       address is printed numerically, according to  the  address family.  For  more  information
       regarding   the   Internet   ``dot   format,''   refer   to  inet(3N).   Unspecified,   or
       ``wildcard'', addresses and ports appear as ``*''.

       The Interface Display

       The  interface  display  provides  a  table  of cumulative  statistics  regarding  packets
       transferred,  errors,  and col- lisions.   The  network addresses of the interface and the
       maximum transmission unit (``mtu'') are also displayed.

       The Routing Table Display

       The routing table display indicates the  available   routes  and   their   status.    Each
       route consists of a destination host or network and a gateway to use in  forwarding  pack-
       ets.   The flags field shows the state of the route (``U'' if ``up''), whether  the  route
       is   to   a   gateway  (``G''), whether  the  route  was created dynamically by a redirect
       (``D''), and whether the route  has  been  modified  by   a  redirect   (``M'').    Direct
       routes   are   created for each interface attached to the local host;  the  gateway  field
       for  such entries shows the address of the outgoing  inter-  face.   The  interface  entry
       indicates the network interface utilized for the route.

       The Interface Display with an Interval

       When  snmpnetstat  is  invoked  with  an interval argument, it displays a running count of
       statistics related to  network interfaces.   This  display  consists  of a column for  the
       primary interface and a column summarizing information for all  interfaces.   The  primary
       interface may be replaced with another interface with the -CI option.  The first  line  of
       each  screen  of  information  contains  a  summary  since  the  system was last rebooted.
       Subsequent lines of output show values accumulated over the preceding interval.

       The Active Sockets Display for a Single Protocol

       When a protocol is specified with the -Cp option, the information displayed is similar  to
       that in the default display for active sockets, except the display is limited to the given
       protocol.

EXAMPLES

       Example of using snmpnetstat to display active sockets (default):

       % snmpnetstat -v 2c -c public -Ca testhost

       Active Internet (tcp) Connections (including servers)
       Proto Local Address                Foreign Address                 (state)
       tcp   *.echo                        *.*                            LISTEN
       tcp   *.discard                     *.*                            LISTEN
       tcp   *.daytime                     *.*                            LISTEN
       tcp   *.chargen                     *.*                            LISTEN
       tcp   *.ftp                         *.*                            LISTEN
       tcp   *.telnet                      *.*                            LISTEN
       tcp   *.smtp                        *.*                            LISTEN
       ...

       Active Internet (udp) Connections
       Proto Local Address
       udp    *.echo
       udp    *.discard
       udp    *.daytime
       udp    *.chargen
       udp    *.time
       ...

       % snmpnetstat -v 2c -c public -Ci testhost

       Name     Mtu Network    Address          Ipkts   Ierrs    Opkts Oerrs Queue
       eri0    1500 10.6.9/24  testhost     170548881  245601   687976     0    0
       lo0     8232 127        localhost      7530982       0  7530982     0    0

       Example of using snmpnetstat to show statistics about a specific protocol:

       % snmpnetstat -v 2c -c public -Cp tcp testhost

       Active Internet (tcp) Connections
       Proto Local Address                Foreign Address                 (state)
       tcp   *.echo                        *.*                            LISTEN
       tcp   *.discard                     *.*                            LISTEN
       tcp   *.daytime                     *.*                            LISTEN
       tcp   *.chargen                     *.*                            LISTEN
       tcp   *.ftp                         *.*                            LISTEN
       tcp   *.telnet                      *.*                            LISTEN
       tcp   *.smtp                        *.*                            LISTEN
       ...

SEE ALSO

       snmpcmd(1), iostat(1), vmstat(1), hosts(5), networks(5), protocols(5), services(5).

BUGS

       The notion of errors is ill-defined.