Port is too long that the process that runs on there

Platforms: 11.2.0.3 on AIX/Linux/Solaris

This is a question about how software Oracle maintains sessions client connected after that the listener is stopped with elegance


Scenario of
=========
You have a DB and its listener running on the DB server. The listener runs on port 3278.
From your laptop, you start a sqlplus session to through the listener. After the session must be connected to the laptop. The process of listening to the DB server is reduced. But sql * more session connected to the laptop can still issue queries and get the results.sqlplus session is still connected to the DB via port 3728, even if the listener is down. ESTABLISHED for that port displays the following output of netstat on the Server DB (10.80.0.213)
$ netstat -an | grep 3728
10.80.0.213.3728   192.168.0.101.59001  17520    881 49640      0 ESTABLISHED
A TCP/IP Port exists only when the process that runs / plays on it is. Right? Thus, after the listener is brought back is there another process that maintains this port so that the client session is served with what he needs the DB?

As far as I KNOW, none of the two processes can share a port. Unless there is a mechanism in the listener that calls the port to another process, when it is worn down.

Hello
I think that explains very well at a level detailed - the way he manages the ports has changed slightly in the new versions of oracle - lsof does not look like it can in older versions.

http://packetpushers.NET/SQLNET-a-k-a-Oracle-TNS-and-firewalls/

See you soon,.
Harry

Tags: Database

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