z/OS Communications Server: IP Messages Volume 2 (EZB, EZD)
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EZD1296I

z/OS Communications Server: IP Messages Volume 2 (EZB, EZD)
SC27-3655-01

EZD1296I
EXPLICITBINDPORTRANGE exhausted

Explanation

There are no more ports available in the active range to be allocated for explicit bind port range processing. This message indicates that the explicit bind port range is too small to accommodate all the applications that issue bind requests to INADDR_ANY and IN6ADDR_ANY and port 0. This message is issued only once every 5 minutes when the TCP/IP stack attempts to allocate a new port from the explicit bind port range and finds that no ports are available. Display the active explicit bind port range by issuing a DISPLAY TCPIP,,SYSPLEX,PORTS command. See the information about DISPLAY TCPIP,,SYSPLEX in z/OS Communications Server: IP System Administrator's Commands.

System action

TCP/IP continues. Applications that issue bind requests to INADDR_ANY and IN6ADDR_ANY , port 0 on this stack will have their subsequent connections fail if a distributed DVIPA is chosen as a source IP address.

Operator response

Contact the system programmer.

System programmer response

Either extend the active explicit bind port range or configure a new explicit bind port range with enough ports to accommodate the way the range is used in your sysplex (or subplex). The increase in size for the range should be at least 64 times the number of TCP/IP stacks configured with the GLOBALCONFIG EXPLICITBINDPORTRANGE option in the sysplex (or subplex). For example, if your current range is 06000–06639 and you have five TCP/IP stacks configured with the GLOBALCONFIG EXPLICITBINDPORTRANGE statement, you probably want to increase the range by 320 ports to 06000–06959. See the information about the GLOBALCONFIG statement in z/OS Communications Server: IP Configuration Reference for information about setting the EXPLICITBINDPORTRANGE statement. See the information about diagnosing network security services (NSS) server problems in z/OS Communications Server: IP Diagnosis Guide for information about how to determine a range for explicit bind ports.

User response

Not applicable.

Problem determination

Not applicable.

Source

z/OS® Communications Server TCP/IP

Module

EZBTCNET

Routing code

2,8

Descriptor code

12

Automation

This is a system console message. You might automate on this message to determine when the EXPLICITBINDPORTRANGE is exhausted, so that you can extend the range, as described in the System Programmer Response.

Example

Not applicable.

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