snmpnetstat - show network status using SNMP

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SYNOPSIS

DESCRIPTION

The host specification may be either a host name or an internet address specified in ``dot notation''.

The options have the following meaning:

-a

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

-c community

Set the community name to use in the SNMP transactions. If no community is specified, ``public'' is used.

-i

Show the state of all of the interfaces.

-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 may 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. A null response typically means 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.

-r

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

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 -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.3n Unspecified (or ``wildcard'') addresses and ports appear as ``*''.

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.

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.

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 by specifying 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.

SEE ALSO

BUGS

Created by unroff & hp-tools. © somebody (See intro for details). All Rights Reserved. Last modified 11/5/97