1、如果/etc/hosts
如下配置
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost
192.168.0.201 racs1

则会发现，在开机启动时，启动sendmail的时候会很慢。
那就改成如下(在127.0.0.1那一行后面加上hostname)：
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost racs1
192.168.0.201 racs1

RAC环境下，/etc/hosts如果采用以上配置，并且listener.ora做如下配置：

#10.2.0/db_1/network/admin/listener.ora.racs1
# Generated by Oracle configuration tools.

LISTENER_RACS1 =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = racs1-vip)(PORT = 1521)(IP = FIRST))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.201)(PORT = 1521)(IP = FIRST)
      )
    )
)

SID_LIST_LISTENER_RACS1 =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /home/oracle/ora10g/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
)
又会碰到另一个问题，就是在安装RAC，DATABASE，或升级这两个软件的时候，在检查系统环境的时候总是会说主机是DHCP的动态IP，警告如下：
Check complete. The overall result of this check is: Not executed <<<<
Recommendation: Oracle supports installations on systems with DHCP-assigned public IP addresses. However, the primary network interface on the system should be configured with a static IP address in order for the Oracle Software to function properly. See the Installation Guide for more details on installing the software on systems configured with DHCP.
或者在安装好后，启动监听程序会有问题，说是没有监听，即使通过crs_stat看到已经启动，但是通过lsnrctl status查看，会发现监听是没有启动起来的。

解决这两个问题的办法是：将127.0.0.1最后的hostname（这里是racs1）去掉。

那如果又想快速启动sendmail又不想监听启动有问题就采用如下配置：
/etc/hosts:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost racs1
192.168.0.201 racs1

listener.ora:
#10.2.0/db_1/network/admin/listener.ora.racs1
# Generated by Oracle configuration tools.

LISTENER_RACS1 =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = racs1-vip)(PORT = 1521)(IP = FIRST))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.201)(PORT = 1521)(IP = FIRST)
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
      )
    )
)

SID_LIST_LISTENER_RACS1 =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /home/oracle/ora10g/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
)

但是，如果采用以上配置还会有一个问题，那就是在安装御载OEM时会碰到如下错误：
Oct 23, 2011 7:39:02 PM oracle.sysman.emcp.util.PlatformInterface executeCommand
WARNING: Error executing /home/oracle/ora10g/product/10.2.0/db_1/sysman/admin/emdrep/bin/RepManager -connect (DESCRIPTION=(ADDRESS_LIST=(ADDRESS=(PROTOCOL=TCP)(HOST=racs1-vip)(PORT=1524))(ADDRESS=(PROTOCOL=TCP)(HOST=racs2-vip)(PORT=1524))(LOAD_BALANCE=yes))(CONNECT_DATA=(SERVICE_NAME=RACSDB))) -repos_user SYSMAN -action drop -verbose -output_file /home/oracle/ora10g/product/10.2.0/db_1/cfgtoollogs/emca/RACSDB/emca_repos_drop_2011-10-23_07-39-01-PM.log
Oct 23, 2011 7:39:02 PM oracle.sysman.emcp.EMReposConfig invoke
SEVERE: Error dropping the repository
Oct 23, 2011 7:39:02 PM oracle.sysman.emcp.EMReposConfig invoke
INFO: Refer to the log file at /home/oracle/ora10g/product/10.2.0/db_1/cfgtoollogs/emca/RACSDB/emca_repos_drop_.log for more details.
Oct 23, 2011 7:39:02 PM oracle.sysman.emcp.EMConfig perform
SEVERE: Error dropping the repository
Refer to the log file at /home/oracle/ora10g/product/10.2.0/db_1/cfgtoollogs/emca/RACSDB/emca_2011-10-23_07-37-51-PM.log for more details.
Could not complete the configuration. Refer to the log file at /home/oracle/ora10g/product/10.2.0/db_1/cfgtoollogs/emca/RACSDB/emca_2011-10-23_07-37-51-PM.log for more details.

临时的解决办法是：修改/etc/hosts，将127.0.0.1后面的racs1去掉。当然了这样做的后果仍然是系统启动时sendmail启动很慢。

而解决所有问题的办法是：做如下配置：

/etc/hosts:
# Do not remove the following line, or various programs
# that require network functionality will fail.
127.0.0.1 localhost.localdomain localhost racs1
192.168.0.201 racs1

listener.ora:
#10.2.0/db_1/network/admin/listener.ora.racs1
# Generated by Oracle configuration tools.

LISTENER_RACS1 =
(DESCRIPTION_LIST =
    (DESCRIPTION =
      (ADDRESS = (PROTOCOL = TCP)(HOST = racs1-vip)(PORT = 1521)(IP = FIRST))
      (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.0.201)(PORT = 1521)(IP = FIRST)
      (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521)(IP = FIRST)
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
      )
    )
)

SID_LIST_LISTENER_RACS1 =
(SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /home/oracle/ora10g/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
)

ITPub博客

RAC网络配置的一些问题

最新文章