Packets Getting Lost Post: 43731

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Top Forums Programming Packets Getting Lost Post 43731 by S.P.Prasad on Friday 21st of November 2003 10:35:18 AM

11-21-2003

Registered User

Packets Getting Lost

I am working on a project, which has the following type of hardware setup.

A special hardware device is receiving data from an external network interface. So we can have multiple such a hardware devices. Now these hardware devices will route the captured incoming data through the external network to a software running on a single PC through LAN.

If we run a single setup of the software in the LAN on a single PC, our software works with no issue.

The problem comes when we deploy two Ethernet card within the PC where the software is running. With the aid of two Ethernet interface we simulate two setup of the same software on the same PC within two different environments. Each software maintains a different setup of the network card it has to interface with.

The final setup in this case looks something like this. The two-network cards are separately connected to two different HUB port from the PC where two setup of software are running. The hardware devices, which capture incomming data from the external network, are also connected to the same HUB to different ports. Each of these hardware devices have been configured to talk to respective network cards within the LAN.

The problem is that each software environment states that some data packet is reported to be lost and if we bring down one of the software environment the error stops occurring.

Can anyone guide me that how can I trace the incoming data via the network from the LAN? Is it really a network problem? Why is that the problem stops occurring when we only run one such a setup of the software? What should be my approach to solve such an issue?

We are running the software on an AIX Ver 5 box.

Thanks in advance.

Last edited by S.P.Prasad; 11-21-2003 at 11:43 AM..

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io_redirect_dsf

io_redirect_dsf(1M)													       io_redirect_dsf(1M)

NAME

       io_redirect_dsf - redirect the persistent device special file from one device to a different device

SYNOPSIS

       old_hw_path new_hw_path

       old_dsf new_dsf

DESCRIPTION

       The command reassigns a persistent device special file (DSF) to a new device when both devices belong to the same class.  If the new device
       does not already exist, before reassigning it you must create the DSF by running either or (see insf(1M) and mksf(1M)).

       In the first form, the command accepts as input the lun hardware paths of the device to be replaced and the  new  device.   In  the  second
       form, the command accepts as input the persistent DSFs of the device to be replaced and the new device.

       Note: The device is inaccessible while the redirection is taking place.

   Options
       recognizes the following options:

	      Specify the hardware path of the device that is being replaced.
			     returns an error if old_hw_path is not a lun hardware path.

	      Specify the hardware path of the new device.
			     returns an error if new_hw_path is not a lun hardware path.

	      Specify the device special file of the device that is being replaced.
			     returns an error if old_dsf is not a persistent DSF.

	      Specify the device special file of the new device.
			     returns an error if new_dsf is not a persistent DSF.

RETURN VALUE

       Exit values are:

       Successful completion.

       An error condition occurred.

EXAMPLES

       Redirect the DSF with the hardware path at to point to the hardware path at Both disks belong to the class.

       Redirect the DSF to point to the device with DSF Both DSFs represent devices that belong to the class

WARNINGS

       You must be superuser to execute the command.

SEE ALSO

       insf(1M), mksf(1M), intro(7).

															       io_redirect_dsf(1M)