How to demonstrate network problems? Post: 302493901

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Top Forums Shell Programming and Scripting How to demonstrate network problems? Post 302493901 by Evan on Friday 4th of February 2011 06:15:14 AM

02-04-2011

Registered User

How to demonstrate network problems?

Hi,
I work on several Sun servers running Solaris (SunOS 5.10). All of these are Application Servers with a propietary software running on it.
It happens that some times (not regularly/deterministic and not so often, i.e. twice a month circa) we register what I think are network problems.
I say this because the messages appearing in alarm log from AS says:
* Can't connect to NE
* AS not available
* Connection to NE time out
Also it happened that after such alarms we had a huge number of frozen TCP connection in CLOSE_WAIT. Following this the File Descriptors for the process that handle TCP connection reached the system limit of 5120 and the AS started to transmit in UDP causing the failure of transactions since the other side didn't expect UDP packets.
Now this behavior (frozen CLOSE_WAIT) is fixed with a patch from the vendor but still remains the network (?) problems causing the alarms.

So since the first time it happened I have a fixed idea in my mind: network problems (Catalyst side to be clear).
Whatever it can be (traffic switch, downlink ...) this affect the traffic (SIP) of our AS.
The only problem is that the network guys says: from our point of view it's everything fine! Always, all the times it happens the problems!

At the end of the story:
What kind of data can I collect (and HOW!?) to DEMONSTRATE that it's a problem of the network (or the AS)?
Do you know a script or tool (not traffic affecting) that can monitor the described scenario?

Thanks you very much!

Regards,
Evan

Evan

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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)