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- .\" Copyright 1989 by Carnegie Mellon University
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- .\" ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- .\" WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
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- .\" Copyright (c) 1983 The Regents of the University of California.
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- .\" by the University of California, Berkeley. The name of the
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- .\" @(#)netstat.1 6.8 (Berkeley) 9/20/88
- .\"
- .TH SNMPNETSTAT 1 "September 17, 1989"
- .UC 5
- .SH NAME
- snmpnetstat \- show network status using SNMP
- .SH SYNOPSIS
- .B snmpnetstat
- .I host community
- [
- .B \-an
- ]
- .br
- .B snmpnetstat
- .I host community
- [
- .B \-inrs
- ]
- .br
- .B snmpnetstat
- .I host community
- [
- .B \-n
- ] [
- .B \-I
- .I interface
- ]
- .I interval
- .br
- .B snmpnetstat
- .I host community
- [
- .B \-p
- .I protocol
- ]
- .SH DESCRIPTION
- The
- .I 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
- .I interval
- specified,
- .I snmpnetstat
- will continuously display the information regarding packet
- traffic on the configured network interfaces.
- The fourth form displays statistics about the named protocol.
- .PP
- The
- .I host
- specification may be either a host name or an internet address
- specified in "dot notation"
- .PP
- The
- .I community
- specifies the community name for the transaction with the remote system.
- .PP
- The options have the following meaning:
- .TP
- .B \-a
- With the default display,
- show the state of all sockets; normally sockets used by
- server processes are not shown.
- .TP
- .B \-i
- Show the state of all of the interfaces.
- .TP
- .BI \-I " interface"
- Show information only about this interface;
- used with an
- .I interval
- as described below.
- .TP
- .B \-n
- Show network addresses as numbers (normally
- .I snmpnetstat
- interprets addresses and attempts to display them
- symbolically).
- This option may be used with any of the display formats.
- .TP
- .BI \-p " protocol"
- Show statistics about
- .IR 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
- .IR /etc/protocols .
- A null response typically means that there are no interesting numbers to
- report.
- The program will complain if
- .I protocol
- is unknown or if there is no statistics routine for it.
- .TP
- .B \-s
- Show per-protocol statistics.
- .TP
- .B \-r
- Show the routing tables.
- When
- .B \-s
- is also present, show routing statistics instead.
- .PP
- 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
- .I /etc/hosts
- and
- .IR /etc/networks ,
- respectively. If a symbolic name for an address is unknown, or if
- the
- .B \-n
- option is specified, the address is printed numerically, according
- to the address family.
- For more information regarding
- the Internet ``dot format,''
- refer to
- .IR inet (3N).
- Unspecified,
- or ``wildcard'', addresses and ports appear as ``*''.
- .PP
- 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.
- .PP
- 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 packets. 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 interface.
- The interface entry indicates the network
- interface utilized for the route.
- .PP
- When
- .I snmpnetstat
- is invoked with an
- .I 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
- .I \-I
- 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.
- .SH SEE ALSO
- iostat(1),
- vmstat(1),
- hosts(5),
- networks(5),
- protocols(5),
- services(5),
- RFC1067
- .SH BUGS
- The notion of errors is ill-defined.
-