我们都知道，Oracle的监听默认端口是1521，但是如果系统上1521已经被占用或业务要求不用默认端口，则需要修改监听的默认端口。
修改监听端口只需要修改配置文件listiner.ora，然后重启监听就行了。但是Oracle实例的PMON进程还是会去找监听1521端口的监听进程去注册，所以同时也需要修改数据库的配置。数据库里只需要在线修改LOCAL_LISTINER即可。
下面以11.2.0.4为例测试修改监听端口：
1、修改监听端口
#查看监听状态 [oracle@rhel6~]$lsnrctlstatus LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:16:24 Copyright(c)1991,2013,Oracle.Allrightsreserved. Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521))) STATUSoftheLISTENER ------------------------ AliasLISTENER VersionTNSLSNRforLinux:Version11.2.0.4.0-Production StartDate07-JAN-201720:16:16 Uptime0days0hr.0min.8sec TraceLeveloff SecurityON:LocalOSAuthentication SNMPOFF ListenerParameterFile/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora ListenerLogFile/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml ListeningEndpointsSummary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) ServicesSummary... Service"orcl"has1instance(s). Instance"orcl",statusREADY,has1handler(s)forthisservice... Thecommandcompletedsuccessfully #停止监听 [oracle@rhel6~]$lsnrctlstop LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:17:39 Copyright(c)1991,Oracle.Allrightsreserved. Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=1521))) Thecommandcompletedsuccessfully #修改配置文件listener.ora，改监听端口为2521 LISTENER= (DESCRIPTION= (ADDRESS_LIST= (ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521)) (ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))) #启动监听 [oracle@rhel6~]$lsnrctlstart LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:19:11 Copyright(c)1991,Oracle.Allrightsreserved. Starting/u02/app/oracle/product/11.2.4/db1/bin/tnslsnr:pleasewait... TNSLSNRforLinux:Version11.2.0.4.0-Production Systemparameterfileis/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora Logmessageswrittento/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml Listeningon:(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) Listeningon:(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) STATUSoftheLISTENER ------------------------ AliasLISTENER VersionTNSLSNRforLinux:Version11.2.0.4.0-Production StartDate07-JAN-201720:19:11 Uptime0days0hr.0min.0sec TraceLeveloff SecurityON:LocalOSAuthentication SNMPOFF ListenerParameterFile/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora ListenerLogFile/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml ListeningEndpointsSummary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) Thelistenersupportsnoservices Thecommandcompletedsuccessfully
至此，监听端口已经修改完毕，这时Oracle实例是无法注册到此监听上的。
2、修改LOCAL_LISTINER参数
#修改参数 sys@ORCL>altersystemsetlocal_listener="(address=(protocol=tcp)(host=rhel6)(port=2521))"; Systemaltered. #查看监听状态 [oracle@rhel6~]$lsnrctlstatus LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:23:10 Copyright(c)1991,Oracle.Allrightsreserved. Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) STATUSoftheLISTENER ------------------------ AliasLISTENER VersionTNSLSNRforLinux:Version11.2.0.4.0-Production StartDate07-JAN-201720:19:11 Uptime0days0hr.3min.59sec TraceLeveloff SecurityON:LocalOSAuthentication SNMPOFF ListenerParameterFile/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora ListenerLogFile/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml ListeningEndpointsSummary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) ServicesSummary... Service"orcl"has1instance(s). Instance"orcl",has1handler(s)forthisservice... Thecommandcompletedsuccessfully
3、使用新端口进行测试连接
[c:\~]$sqlpluszx/zx@192.168.56.2:2521/orcl sql*Plus:Release12.1.0.1.0Productionon星期六1月720:24:172017 Copyright(c)1982,Oracle.Allrightsreserved. 连接到: OracleDatabase11gEnterpriseEditionRelease11.2.0.4.0-64bitProduction WiththePartitioning,OLAP,DataMiningandRealApplicationTestingoptions sql>
修改监听端口完成。
4、把Oracle实例的注册端口改回1521
sys@ORCL>altersystemsetlocal_listener=''; Systemaltered.
官方文档中还提供了另一种配置LOCAL_LISTINER的方法：
在tnsnames.ora中添加配置，然后配置LOCAL_LISTINER为tnsnames.ora中的名字即可
#配置tnsnames.ora [oracle@rhel6admin]$vitnsnames.ora listener1=(ADDRESS=(PROTOCOL=TCP)(HOST=192.168.56.2)(PORT=2521)) #修改LOCAL_LISTINER参数 sys@ORCL>altersystemsetlocal_listener=listener1; Systemaltered. #查看监听状态 [oracle@rhel6~]$lsnrctlstatus LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:34:01 Copyright(c)1991,Oracle.Allrightsreserved. Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) STATUSoftheLISTENER ------------------------ AliasLISTENER VersionTNSLSNRforLinux:Version11.2.0.4.0-Production StartDate07-JAN-201720:31:28 Uptime0days0hr.2min.33sec TraceLeveloff SecurityON:LocalOSAuthentication SNMPOFF ListenerParameterFile/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora ListenerLogFile/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml ListeningEndpointsSummary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) ServicesSummary... Service"orcl"has1instance(s). Instance"orcl",has1handler(s)forthisservice... Thecommandcompletedsuccessfully
另外还可以使用静态监听的方法来修改监听的端口，但是Oracle实例不是“主动”注册到监听器上的。
sys@ORCL>showparameterlocal_listener NAME TYPE VALUE --------------------------------------------------------------------------------------------------- local_listener string #修改监听为静态监听 [oracle@rhel6admin]$vilistener.ora LISTENER= (DESCRIPTION= (ADDRESS_LIST= (ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521)) (ADDRESS=(PROTOCOL=ipc)(KEY=extproc)))) SID_LIST_LISTENER= (SID_LIST= (SID_DESC= (GLOBAL_DBNAME=orcl) (ORACLE_HOME=/u02/app/oracle/product/11.2.4/db1) (SID_NAME=orcl)) #重启监听 [oracle@rhel6~]$lsnrctlstop LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:38:45 Copyright(c)1991,Oracle.Allrightsreserved. Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) Thecommandcompletedsuccessfully [oracle@rhel6~]$lsnrctlstart LSNRCTLforLinux:Version11.2.0.4.0-Productionon07-JAN-201720:38:51 Copyright(c)1991,Oracle.Allrightsreserved. Starting/u02/app/oracle/product/11.2.4/db1/bin/tnslsnr:pleasewait... TNSLSNRforLinux:Version11.2.0.4.0-Production Systemparameterfileis/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora Logmessageswrittento/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml Listeningon:(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) Listeningon:(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) Connectingto(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) STATUSoftheLISTENER ------------------------ AliasLISTENER VersionTNSLSNRforLinux:Version11.2.0.4.0-Production StartDate07-JAN-201720:38:52 Uptime0days0hr.0min.0sec TraceLeveloff SecurityON:LocalOSAuthentication SNMPOFF ListenerParameterFile/u02/app/oracle/product/11.2.4/db1/network/admin/listener.ora ListenerLogFile/u02/app/oracle/diag/tnslsnr/rhel6/listener/alert/log.xml ListeningEndpointsSummary... (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=0.0.0.0)(PORT=2521))) (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=extproc))) ServicesSummary... Service"orcl"has1instance(s). Instance"orcl",statusUNKNOWN,has1handler(s)forthisservice... Thecommandcompletedsuccessfully
静态监听实例的状态为UNKNOWN，测试连接成功
[c:\~]$sqlpluszx/zx@192.168.56.2:2521/orcl sql*Plus:Release12.1.0.1.0Productionon星期六1月720:40:032017 Copyright(c)1982,DataMiningandRealApplicationTestingoptions sql>
官方文档：
http://docs.oracle.com/cd/E11882_01/network.112/e41945/listenercfg.htm#NETAG1154
