April 1999
Intermediate to advanced
584 pages
23h 17m
English
Content preview from Oracle Database Administration: The Essential RefeBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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SQL*Net Troubleshooting
Even in the best planned network, problems can and do occur. There are few things more frustrating than to have what appear to be a properly configured client and server that refuse to connect. Even in the simplest network, there could be several potential causes of this failure, including:
A problem with a SQL*Net configuration parameter
A non-functioning network protocol
A failure in a logical network component, like a router
A failure in the physical network, like a broken wire or unplugged connection
The key to diagnosing network connectivity problems is to logically analyze the problem and confirm the proper operation of each component. You must determine if the failure is due to a problem in:
The Oracle software
The network protocol layers
The physical network
In diagnosing the problem, you may be able to take advantage of tools and techniques provided by the host operating system as well as by Oracle.
One easy way to determine whether SQL*Net is properly installed, configured, and running on a particular server is to perform a loopback test on the server host. This technique uses SQL*Net to connect to the database, even though it is local on that machine. To perform a loopback test using SQL*Plus:
Verify that the database is up and running by connecting locally using SQL*Plus. For example, issue the command line:
sqlplus scott/tiger
to establish a connection to the database.
Connect to the database using a SQL*Net loopback connection by specifying a SQL*Net connect ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.