Oracle启动两个监听

　　接上篇：Oracle服务器修改IP后

Oracle服务器更换IP后，办公网络里面可以正常访问了，外地的同事，连了vpn 也可以访问，以为可以收工回家，突然又有同事过来说，机房的服务器ping不通新的ip了。

换了几台机器，都ping不通，ping其他新ip一个段的服务器又正常，也可以ssh，又试了下以前的ip地址，可以ping通。
总结起来，ping不通的服务器都是Oracle服务器在同一个网段的服务器，以前都是10段的，Oracle服务器换了ip后，外部访问的地址就不是10段了，但是同一个段的服务器，又不能去另一个路由器绕一圈回来访问192段，所有不能访问。（猜测）

Oracle服务器路由如下，默认访问地址为192段

[oracle@venn01 admin]$ route
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
.xx.xx.     *               255.255.255.0   U                    eth1
.xx.xx.   *               255.255.255.0   U                    virbr0
.xx.xx.     *               255.255.255.0   U                    eth0
link-local      *               255.255.0.0     U                 eth0
link-local      *               255.255.0.0     U                 eth1
default         .xx.xx.x     0.0.0.0         UG                   eth1

网卡 eth0 ip ：10.xx.xx.xx

网卡 eth1 ip ：192.xx.xx.xx

服务器的默认路由地址是192段的

不想去配路由，因为不会

所以解决办法就是，给Oracle启动两个监听，分别监听服务器的两个IP地址，端口保持不变

修改 listener.ora

[oracle@ut25 admin]$ pwd
/opt/oracle/db01/app/oracle/product/11.2.0/network/admin
[oracle@venn01 admin]$ more listener.ora
# listener.ora Network Configuration File: /opt/oracle/db01/app/oracle/product/11.2./network/admin/listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /opt/oracle/db01/app/oracle/product/11.2.)
      (PROGRAM = extproc)
    )
  )

LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 10.xx.xx.xx)(PORT = 1521))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.xx.xx.xx)(PORT = 1521))
    )
  )

ADR_BASE_LISTENER = /opt/oracle/db01/app/oracle

重启监听：
[oracle@venn01 ~]$ lsnrctl stop

LSNRCTL for Linux: Version 11.2.0.1. - Production on -SEP- ::

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

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
The command completed successfully

[oracle@venn01 admin]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.1. - Production on -SEP- ::

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

TNS-: Listener using listener name LISTENER has already been started
[oracle@venn01 admin]$ lsnrctl stop

LSNRCTL for Linux: Version 11.2.0.1. - Production on -SEP- ::

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

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
The command completed successfully
[oracle@venn01 admin]$ lsnrctl start

LSNRCTL for Linux: Version 11.2.0.1. - Production on -SEP- ::

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

Starting /opt/oracle/db01/app/oracle/product/11.2./bin/tnslsnr: please wait...

TNSLSNR for Linux: Version 11.2.0.1. - Production
System parameter file is /opt/oracle/db01/app/oracle/product/11.2.0/network/admin/listener.ora
Log messages written to /opt/oracle/db01/app/oracle/diag/tnslsnr/venn01/listener/alert/log.xml
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=.xx.xx.xx)(PORT=)))
Listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=.xx.xx.xx)(PORT=)))

Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=IPC)(KEY=EXTPROC0)))
STATUS of the LISTENER
------------------------
Alias                     LISTENER
Version                   TNSLSNR for Linux: Version 11.2.0.1. - Production
Start Date                -SEP- ::
Uptime                     days  hr.  min.  sec
Trace Level               off
Security                  ON: Local OS Authentication
SNMP                      OFF
Listener Parameter File   /opt/oracle/db01/app/oracle/product/11.2./network/admin/listener.ora
Listener Log File         /opt/oracle/db01/app/oracle/diag/tnslsnr/venn01/listener/alert/log.xml
Listening Endpoints Summary...
  (DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(KEY=EXTPROC0)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=10.xx.xx.xx)(PORT=1521)))
  (DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=172.xx.xx.xx)(PORT=1521)))
Services Summary...
Service "PLSExtProc" has  instance(s).
  Instance "PLSExtProc", status UNKNOWN, has  handler(s) for this service...
The command completed successfully

可见，Oracle的两个监听分别在两个IP地址：10和192 都起来了

在办公网可以正常访问

在机房内网也可以正常访问了

搞定