Managing Connections › Connection Lists

Connection Lists

From a connection list you can diagnose performance or connectivity related problems. For example, if an FTP file transfer is taking an unusually long time or is stalling, you may want to view the connection information to see if there are any data transfer problems.

You can produce a list of connections to the IBM TCP/IP or CA TCPaccess CS host, or Cisco channel card, to match a set of criteria. For example, you can produce a list specifically for all Telnet connections or, more generally, for all connections with a particular task name. You can also produce a list of all connections with a particular local port number.

For each connection list option, there is a Connection List Criteria panel. This appears when you select an option, and it lets you specify criteria to filter the connections to display. You can limit the maximum number of connections displayed for each stack and set the initial sorting order.

Telnet Connection List

The Telnet Connection List displays information about the current state of active Telnet connections to a TCP/IP host or Cisco channel card.

The Telnet Connection List can provide the following types of information:

• Mapping of IP addresses to LU names and VTAM application names
• Combined information from more than one of these sources—IBM TCP/IP, CA TCPaccess CS, or the channel card

You can use the actions shown on the TCP/IP : Telnet Connection List, for example, P=Ping or T=TraceRoute, to investigate problems occurring on any of the listed connections.

You can list the following connections:

• Telnet Connections

  Displays standard Telnet connection details, for example, host, port, LU name, application, server, and byte counts.

• Telnet Connections (Advanced)

  Displays all standard details, plus User ID, Round Trip Time (RTT), retransmit, and fragment data from the Packet Analyzer.

• Telnet Connections (NetSpy RTM)

  (CA NetSpy required) Displays all standard details, plus session type, average network response time, and average host response time.

• Telnet Connections (Advanced + RTM)

  (CA NetSpy required) Displays all advanced details, plus session type, average network response time, average host response time, and packet counts.

FTP Connection List

The FTP Connections list displays information about FTP connections that use IBM stacks on systems with at least z/OS V1R10.0.

You can list connections that satisfy specified criteria. From the list, you can perform actions to investigate problems occurring on a connection.

CICS Socket Connection List

CICS Socket Connection List displays information about the current state of any active CICS socket connections.

Note: CICS socket connection lists are available only if your TCP/IP management region is configured with CA NetMaster SM for CICS.

You can list the following connections:

• CICS Socket Connections

  (CA NetMaster SM for CICS required) Displays CICS socket connections from the Packet Analyzer.

• CICS Socket Connections (with History)

  (CA NetMaster SM for CICS required) Displays general connection details for active and closed connections.

General Connection List

The Connection List displays information about the current state of any active connections to the selected stack.

You can investigate problems occurring on any of the listed connections by using the actions shown on the Connection List panel.

You can list the following connections:

• General Connections

  Displays general IP connection details for any connections, including local host, remote host, port, task name, start time, idle time, stack, and byte counts.

• General Connections (Advanced)

  Displays general connection details, plus Telnet User ID, packet counts, elapsed time, RTT, retransmit, and fragment data from the Packet Analyzer.

• General Connections (with History)

  Displays advanced general connection details for active and closed connections.

Listener List

The TCP Listeners list displays information about listeners for IBM stacks.

You can list listeners that satisfy specified criteria. From the list, you can perform actions to investigate problems occurring on a listener (for example, connections dropped because backlog exceeded).

Which List Connections Option Should I Use?

The following table can help you to decide which option to use for which task.