单网卡绑定多IP导致TNS-12542等错误

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标题:单网卡绑定多IP导致TNS-12542等错误

作者:惜分飞©版权所有[未经本人同意,不得以任何形式转载,否则有进一步追究法律责任的权利.]

今天想在家中访问下公司的oracle数据库,我了解的情况是那台服务器是有内外网ip,内网可以访问数据库。所以按照常理推断我只要配置下listener,外网应该也就可以正常访问
于是我就登陆到服务器上,修改listener.ora文件

SID_LIST_LISTENER =
  (SID_LIST =
    (SID_DESC =
      (SID_NAME = PLSExtProc)
      (ORACLE_HOME = /opt/oracle/product/10.2.0/db_1)
      (PROGRAM = extproc)
    )
  )
LISTENER =
  (DESCRIPTION_LIST =
    (DESCRIPTION =
     (ADDRESS = (PROTOCOL = TCP)(HOST = 192.168.11.12)(PORT = 1521))
     (ADDRESS = (PROTOCOL = TCP)(HOST = 211.155.227.172)(PORT = 1521))
      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC0))
    )
  )

lsnrctl start 不能正常启动,报错如下:

Error listening on: (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=211.155.227.172)(PORT=1521)))
TNS-12542: TNS:address already in use
 TNS-12560: TNS:protocol adapter error
  TNS-00512: Address already in use
   Linux Error: 98: Address already in use

根据错误提示,意思是HOST=211.155.227.172这个(地址+端口+协议)已经被占用
第一反应:使用netstat -an|grep 1521没有发现该地址有1521端口启动,说明没有被占用
第二反应:防火墙,通过查看发现防火墙是关闭
通过以上两项查看都没有问题,那我修改下监听端口尝试下,然后我把监听端口改成了1522,监听能够正常启动,并且开始监听1522端口。通过实验证明1522端口是正常的,那问题出在哪里呢?为什么1521不行,我查看下ip地址的设置情况

eth0      Link encap:Ethernet  HWaddr 00:E0:4D:C3:D5:18
          inet addr:192.168.11.12  Bcast:192.168.11.255  Mask:255.255.252.0
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:5000774 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1610691 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:1828268348 (1.7 GiB)  TX bytes:436101782 (415.8 MiB)
eth0:1    Link encap:Ethernet  HWaddr 00:E0:4D:C3:D5:18
          inet addr:211.155.227.172  Bcast:211.155.227.175  Mask:255.255.255.240
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1

发现192.168.11.12和211.155.227.172都是绑定在eth0的网卡上,因为监听在192.168.11.12启动了1521端口,所以211.155.227.172上的1521不能起来(因为同一张网卡)
我想既然是公用同一张网卡,那么监听了192.168.11.12:1521,那我用211.155.227.172:1521应该可以正常访问,除掉监听中的(ADDRESS = (PROTOCOL = TCP)(HOST = 211.155.227.172)(PORT = 1522)),然后直接在自己的电脑上修改tns,使用 211.155.227.172地址访问,果然能够访问。
通过这次事件得出结论:单网卡绑定多IP,只要监听主IP地址,其他绑定的IP均可以访问,不需要修改任何监听信息

One thought on “单网卡绑定多IP导致TNS-12542等错误

  1. 问题应该是动态监听导致,换成静态监听后,一切正常
    SID_LIST_LISTENER =
    (SID_LIST =
    (SID_DESC =
    (SID_NAME = ecp)
    (ORACLE_HOME = /opt/oracle/product/10.2.0/db_1)
    (GLOBAL_DBNAME = ecp)
    )
    )
    LISTENER =
    (DESCRIPTION_LIST =
    (DESCRIPTION =
    (ADDRESS = (PROTOCOL = TCP)(HOST =192.168.11.12)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 127.0.0.1)(PORT = 1521))
    (ADDRESS = (PROTOCOL = TCP)(HOST = 211.155.227.172)(PORT = 1521))
    )
    )

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