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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ddi_intr_get_supported_types

ddi_intr_get_supported_types(9F)										  ddi_intr_get_supported_types(9F)

NAME

       ddi_intr_get_supported_types - return information on supported hardware interrupt types

SYNOPSIS

       #include <sys/types.h>
       #include <sys/conf.h>
       #include <sys/ddi.h>
       #include <sys/sunddi.h>

       int ddi_intr_get_supported_types(dev_info_t *dip, int *typesp);

INTERFACE LEVEL

       Solaris DDI specific (Solaris DDI)

       dip	       Pointer to dev_info structure

       typesp	       Pointer to supported interrupt types

       The ddi_intr_get_supported_types() function retrieves the interrupt types supported by a particular hardware device and by the system soft-
       ware. Upon successful return, the supported types are returned as a bit mask in	the  integer  pointed  to  by  the  typesp  argument.  See
       <sys/ddi_intr.h> for a list of interrupts that can be returned by a hardware device.

       For PCI devices that support MSI and/or MSI-X based hardware, this interface returns only the interrupt types that are supported by all the
       hardware in the path to the hardware device.

       An interrupt type is usable by the hardware device if it is returned by the ddi_intr_get_supported_types() function. The device driver  can
       be programmed to use one of the returned interrupt types to receive hardware interrupts.

       The ddi_intr_get_supported_types() function returns:

       DDI_SUCCESS	       On success.

       DDI_EINVAL	       On encountering invalid input parameters.

       DDI_INTR_NOTFOUND       Returned when the hardware device is found not to support any hardware interrupts.

CONTEXT

       The ddi_intr_get_supported_types() function can be called from user or kernel non-interrupt context.

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

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Interface Stability	     |Evolving			   |
       +-----------------------------+-----------------------------+

       pci(4), attributes(5), pcmcia(7D), sysbus(4), ddi_intr_add_handler(9F), ddi_intr_alloc(9F), ddi_intr_enable(9F)

       The  ddi_intr_get_supported_types()  function can be called by the device driver even at any time if the driver has added an interrupt han-
       dler for a given interrupt type.

       Soft interrupts are always usable and are not returned by this interface.

       Any consumer of this interface should verify that the return value is not equal to DDI_SUCCESS. Incomplete checking for failure codes could
       result in inconsistent behavior among platforms.

								    07 Apr 2005 				  ddi_intr_get_supported_types(9F)