ethernet packet drop

[Mehul Chadha <mehulc87@gmail.com>]

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Hello everyone,

                       I am working on a project for router development.

The basic specifications of the router are as follows:

·         Supports MPC8248 - 32-bit PowerQUICC II Communication Processor
running at 400 MHz (Max) core frequency, 200 MHz (Max) CPM, and 100MHz (Max)
external bus frequency.

·         64-bit wide 256-MByte synchronous DRAM (soldered on-board),
 consisting
of 4 no. devices of 8M x 16 x 4, residing on 60X bus (PBI mode), controlled
by SDRAM machine.

·         256 MB NAND Flash, organized as 256M x 8, buffered from 60X bus,
controlled by UPM machine.

·         Upto 8MB NOR Flash, Boot sector (bottom) type, organized as 8M x
8, buffered from 60X bus, controlled by GPCM machine.

·           Linux Kernel version: linux-2.6.16.40


While testing my router with the spirent test equipment, the 2 ethernet
ports of the router are connected to the testing equipment. I send data from
the testing equipment through the ethernet port , the router forwards the
packet to the other ethernet port again connected to the testing equipment.
When I increase the throughput to 70 mbps the testing equipment starts
showing packet losses which should not happen as its a 10/100 mbps link. I
am not able to understand where would the problem lie. Pls if someone can
list the different issues due to which this problem is occurring, it will be
really helpful


Regards,

Mehul

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