Administering SCO IPX/SPX

Monitoring current NVT connections (dnvt)

SCO IPX/SPX hosts act as NVT servers on the network; any client on the network that is capable of running the NVT protocol can connect to these servers. The NetWare NVT Monitor and its command-line equivalent, dnvt(PADM), are useful in determining which machines on the network are connected to a given NVT server. dnvt also displays information about each connection, can be used to determine the amount of activity performed by the user of the connection or to highlight any potential network connectivity problems.

A useful feature of the NetWare NVT Monitor is automatic screen refresh which updates the NVT connection display at a regular, user specified, interval. The refresh interval can be controlled using a slider for the amount of time in minutes and seconds between refreshes. Automatic screen refresh can be set using the Set Auto Refresh cascade menu, which is available under the View menu.

The NetWare NVT Monitor's output looks like this:

The NetWare NVT Monitor displays the following:

Client Name / Address
If the client is a DOS client, a NetWare address will be displayed. If the connection is from a client that also advertises services on the network (such as another SCO OpenServer host running IPX/SPX), the host name is displayed.

The current packet sequence number in use for the connection.

The current packet retry count. In normal situations, the retry count should always be zero. However, if there is traffic congestion or the server or client are slow, it is possible to see a non-zero retry count.

The current number of keep alive packets sent to the client. Keep alive packets are sent when the server thinks the client is no longer on the network or when the connection is inactive.

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© 2003 Caldera International, Inc. All rights reserved.
SCO OpenServer Release 5.0.7 -- 11 February 2003