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man pages section 1M: System Administration Commands     Oracle Solaris 10 1/13 Information Library
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Preface

Introduction

System Administration Commands - Part 1

System Administration Commands - Part 2

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smrsh(1M)

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smtnrhdb(1M)

smtnrhtp(1M)

smtnzonecfg(1M)

smuser(1M)

snmpbulkget(1M)

snmpbulkwalk(1M)

snmpcmd(1M)

snmpconf(1M)

snmpd(1M)

snmpdelta(1M)

snmpdf(1M)

snmpdx(1M)

snmpget(1M)

snmpgetnext(1M)

snmpinform(1M)

snmpnetstat(1M)

snmpset(1M)

snmptable(1m)

snmptest(1M)

snmptranslate(1m)

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su(1M)

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sysdef(1M)

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sysidroot(1M)

sysidsys(1M)

sysidtool(1M)

syslogd(1M)

sys-unconfig(1M)

talkd(1M)

tapes(1M)

taskstat(1M)

telinit(1M)

telnetd(1M)

tftpd(1M)

System Administration Commands - Part 3

snmpnetstat

- show network status using SNMP

Synopsis

/usr/sfw/bin/snmpnetstat [common options] [-a] [-n] agent
/usr/sfw/sma_snmp/bin/snmpnetstat [common options] [-iorns] agent
/usr/sfw/sma_snmp/bin/snmpnetstat [common options] [-in] 
     [-I interface] agent [interval]
/usr/sfw/sma_snmp/bin/snmpnetstat [common options] [-an] 
     [-s] [-P 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. Referring to the SYNOPSIS, above:

The operand agent identifies a target SNMP agent that is instrumented to monitor the given objects. At its simplest, the agent specification consists of a host name or an IPv4 address. In this situation, the command attempts communication with the agent using UDP/IPv4 to port 161 of the target host. See snmpcmd(1M) for a full list of the possible formats for agent.

The version 1 and version 2c community specifies the community name for the transaction with the remote system.

Options

The following options are supported:

common options

See snmpcmd(1M) for a list of possible values for common options, as well as their descriptions.

-a

With the default display, show the state of all sockets. Normally, sockets used by server processes are not shown.

-i

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.

-o

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

-I interface

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

-n

Show network addresses as numbers. (Normally, snmpnetstat interprets addresses and attempts to display them symbolically). This option can be used with any of the display formats.

-P 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 or in a naming service. 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.

-s

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

-r

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

interval

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.

snmpnetstat supports the following types of display:

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 /etc/hosts and /etc/networks, respectively. If a symbolic name for an address is unknown, or if the -n option is specified, the address is printed numerically, according to the address family. For more information regarding the Internet "dot format," refer to inet(3SOCKET). Unspecified, or wildcard, addresses and ports appear as "\(**".

interface display

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.

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 packets. The flags field shows the state of the route (U if the route is 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 used for the route.

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 can be replaced with another interface with the -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.

active sockets display for a single protocol

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

Note that figures snmpnetstat reports in the Ipkts column (part of the interface display) might differ from figures in the Ipkts column in netstat(1M). snmpnetstat displays a total of unicast, multicast, and broadcast packets. netstat omits broadcast packets from its total.

Examples

Example 1 Displaying Active Sockets

The following is an example of snmpnetstat's default display, which is to display active sockets.

% snmpnetstat -v 2c -c public -a 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 -i 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 2 Displaying Statistics for a Specific Protocol

The following example shows how snmpnetstat displays statistics for a specific protocol.

% snmpnetstat -v 2c -c public -P 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

Exit Status

0

Successful completion.

1

A usage syntax error. A usage message is displayed.

Attributes

See attributes(5) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
Availability
SUNWsmcmd
Interface Stability
External

See Also

iostat(1M), netstat(1M), snmpcmd(1M), vmstat(1M), attributes(5)