想要修改oracle动态监听的端口号必须同时修改listener.ora文件和动态参数local_listener才能成功在修改后的端口监听到数据库。

1、数据库默认动态监听
oracle数据库在没有listener.ora文件，没有设置local_listener参数时，默认监听的是1521端口。

默认 local_listener为空
SQL> show parameter local_listener;

NAME TYPE VALUE
------------------------------------ ----------- ------------------------------
local_listener string

数据库成功监听在1521端口
-------------------------------------------------------------------------------------------------------------------------
[oracle@rac1 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-JUL-2014 14:57:29

Copyright (c) 1991, 2009, Oracle. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 02-JUL-2014 14:57:07
Uptime 0 days 0 hr. 0 min. 22 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /u01/app/oracle/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1521)))
Services Summary...
Service "center" has 1 instance(s).
Instance "center", status READY, has 1 handler(s) for this service...
The command completed successfully
------------------------------------------------------------------------------------------------------------------------------

2、只修改local_listener参数
现把local_listener的监听端口改成1251，不创建监听文件

SQL> alter system set local_listener='(DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.16.228)(PORT=1251))))' scope=both;
System altered.

重启监听，用alter system register;手动注册动态监听，查看监听状态。

[oracle@rac1 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-JUL-2014 15:14:13

Copyright (c) 1991, 2009, Oracle. All rights reserved.

Connecting to (ADDRESS=(PROTOCOL=tcp)(HOST=)(PORT=1521))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 02-JUL-2014 15:13:48
Uptime 0 days 0 hr. 0 min. 24 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Log File /u01/app/oracle/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1521)))
The listener supports no services
The command completed successfully

可以看出数据库监听还是启动在1521端口下，但监听不到数据库

3、创建listener.ora，监听端口为1251

[oracle@rac1 admin]$ more listener.ora
# listener.ora Network Configuration File: /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
# Generated by Oracle configuration tools.

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP)(HOST = rac1)(PORT = 1251))
)
)

ADR_BASE_LISTENER = /u01/app/oracle

重启监听，用alter system register;手动注册动态监听，查看监听状态。

[oracle@rac1 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-JUL-2014 15:20:20

Copyright (c) 1991, 2009, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rac1)(PORT=1251)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 02-JUL-2014 15:20:01
Uptime 0 days 0 hr. 0 min. 19 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1251)))
Services Summary...
Service "center" has 1 instance(s).
Instance "center", status READY, has 1 handler(s) for this service...
The command completed successfully

数据库监听成功在1251下监听到数据库

4、创建listener.ora，监听端口为1251

SQL> alter system set local_listener='' scope=both;

System altered.

重启监听，用alter system register;手动注册动态监听，查看监听状态。

[oracle@rac1 admin]$ lsnrctl status

LSNRCTL for Linux: Version 11.2.0.1.0 - Production on 02-JUL-2014 15:35:36

Copyright (c) 1991, 2009, Oracle. All rights reserved.

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=rac1)(PORT=1251)))
STATUS of the LISTENER
------------------------
Alias LISTENER
Version TNSLSNR for Linux: Version 11.2.0.1.0 - Production
Start Date 02-JUL-2014 15:32:29
Uptime 0 days 0 hr. 3 min. 7 sec
Trace Level off
Security ON: Local OS Authentication
SNMP OFF
Listener Parameter File /u01/app/oracle/product/11.2.0/db_1/network/admin/listener.ora
Listener Log File /u01/app/oracle/diag/tnslsnr/rac1/listener/alert/log.xml
Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=rac1)(PORT=1251)))
The listener supports no services
The command completed successfully

可以看出数据库监听还是启动在1251端口下，但监听不到数据库

总计：要修改动态监听的端口号必须同时修改liserner.ora和动态参数local_listener中的端口号才行。

修改oracle动态监听端口