Technical data

Configuring and Managing TELNET
14.2 Solving TELNET Problems
14.2.1 TELNET Characteristics That Affect Performance
The settings for the TELNET systemwide characteristics might affect TCP/IP
Services and TELNET performance. To display the TELNET systemwide
characteristics, enter:
TCPIP> SHOW SERVICE TELNET /FULL
The command generates a display similar to the following:
Service: TELNET
State: Enabled
Port: 23 Protocol: TCP Address: 0.0.0.0
Inactivity: 1 User_name: Process: not defined
Limit:30 Active: 1 Peak: 4
File: not defined
Flags: Listen Priv Rtty
Socket Opts: Keepalive
Receive: 3000 Send: 3000
Log Opts: Actv Dactv Conn Error Logi Logo Mdfy Rjct Addr
File: not defined
Security
Reject msg: not defined
Accept host: 0.0.0.0
Accept netw: 0.0.0.0
14.2.2 Requests That Cannot Be Satisfied
The TELNET server sends the following error message for a TELNET login
request that cannot be satisfied:
SS$_EXQUOTA
This error is due to insufficient local resources, such as:
• Too many sessions
To determine whether this is the cause of the problem, check to see whether
the maximum number of concurrent sessions has been exceeded. Enter the
following TCP/IP management command:
TCPIP> SHOW SERVICE TELNET
If the maximum number of concurrent sessions has been exceeded, the display
shows:
PEAK=limit
To increase the number of allowed sessions, enter the following command:
TCPIP> SET SERVICE TELNET /LIMIT=n
• Insufficient OpenVMS nonpaged pool
To determine whether this is the cause of the problem, check to see whether
the OpenVMS nonpaged pool is insufficient for servicing a new TELNET
connection. If so, monitor the server.
To improve any of the parameters, redefine the logical names.
• Excessive OpenVMS login sessions
To determine whether this is the cause of the problem, check to see whether
the limit for maximum OpenVMS sessions has been exceeded. If the current
value is not appropriate, redefine it.
14–4 Configuring and Managing TELNET