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Full Discussion: How to demonstrate network problems?
Top Forums Shell Programming and Scripting How to demonstrate network problems? Post 302493960 by jim mcnamara on Friday 4th of February 2011 10:22:35 AM
Old 02-04-2011
First read up on snoop. You can capture and analyze packets, then run reports against those packets when you have a problem for network verification. The main downside to this strategy is disk usage. Not performance. You point of interest is to be able to realte the send time of a packet from your app to the time it takes for the expected return packet to appear. This is not the same thing as ping return times.

You can also use netstat -i to gather information on packet collisions. When collisions rise to a significant level trafic is impeded to large degree.

However, most network problem I have seen are the result of crappy application code.
Once a network is set up correctly, and is not subject to huge torrents of random data, you do not see problems except for hardware issues or intrusions.

A common application fault is not implementing a circular buffer (queue) large enough to deal with full bore traffic. In other words the network outruns the application between two apps: one slower, one faster.
 

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LEARN ABOUT CENTOS

install-solaris

install-solaris(1M)													       install-solaris(1M)

NAME

       install-solaris - install the Solaris operating system

SYNOPSIS

       install-solaris

       install-solaris	invokes  the  Solaris  Install	program. Depending on graphical capability and available memory at the time of invocation,
       install-solaris invokes either a text-based installer or a graphical installer.

       The following minimum requirements for physical memory dictate which features are available during installation:

       For SPARC machines:

       128 MB

	   Minimum physical memory for all installation types

       128 MB

	   Minimum physical memory required for windowing system

       384 MB

	   Minimum physical memory required for graphical-based installation

       For x86 machines:

       256 MB

	   Minimum physical memory for all installation types

       256 MB

	   Minimum physical memory required for windowing system

       512 MB

	   Minimum physical memory required for graphical-based installation

       In some cases, even if the minimum physical memory is present, available virtual memory after system startup can limit the number  of  fea-
       tures available.

       install-solaris	exists	only  on  the Solaris installation media (CD or DVD) and should be invoked only from there. Refer to the  for more
       details.

       install-solaris allows installation of the operating system onto any standalone system. install-solaris loads the software available on the
       installation media. Refer to the  for disk space requirements.

       Refer to the  for more information on the various menus and selections.

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcdrom  (Solaris instal-  |
       |			     |lation media)		   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       pkginfo(1), install(1M), pkgadd(1M), attributes(5)

       It is advisable to exit install-solaris by means of the exit options in the install-solaris menus.

								    23 Sep 2005 					       install-solaris(1M)
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