From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qy0-f197.google.com (mail-qy0-f197.google.com [209.85.221.197]) by bilbo.ozlabs.org (Postfix) with ESMTP id A3E1FB722B for ; Thu, 18 Jun 2009 00:53:21 +1000 (EST) Received: by qyk35 with SMTP id 35so476892qyk.26 for ; Wed, 17 Jun 2009 07:53:18 -0700 (PDT) MIME-Version: 1.0 Date: Wed, 17 Jun 2009 20:23:17 +0530 Message-ID: <251d650c0906170753y35058a93nf37532a24985767f@mail.gmail.com> Subject: ethernet packet drop From: Mehul Chadha To: linuxppc-dev@lists.ozlabs.org Content-Type: multipart/alternative; boundary=0016e645fae8968472046c8c737f List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --0016e645fae8968472046c8c737f Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Hello everyone, I am working on a project for router development. The basic specifications of the router are as follows: =B7 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. =B7 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. =B7 256 MB NAND Flash, organized as 256M x 8, buffered from 60X bus= , controlled by UPM machine. =B7 Upto 8MB NOR Flash, Boot sector (bottom) type, organized as 8M = x 8, buffered from 60X bus, controlled by GPCM machine. =B7 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 fro= m 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 b= e really helpful Regards, Mehul --0016e645fae8968472046c8c737f Content-Type: text/html; charset=Big5 Content-Transfer-Encoding: quoted-printable Hello everyone,

        &nbs= p;            &= nbsp; I am working on a project for router development.

The basic sp= ecifications of the router are as follows:
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=A1P         Supports MPC8248 - 32-bi= t PowerQUICC II Communication Processor running at 400 MHz (Max) core frequency, 200 MHz (Max) CPM, and 100MHz (Max) extern= al bus frequency.

=A1P&nbs= p;        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= .

=A1P&nbs= p;        256 MB NAND Flash, organized as 256M x 8, buffered from 60X bus, controlled by UPM machine.

=A1P&nbs= p;        Upto 8MB NOR Flash, Boot sector (bottom) type, organized as 8M x 8, buffered from 60= X bus, controlled by GPCM machine.

=A1P  = ;         Linu= x Kernel version: linux-2.6.16.40


While testing my router with the spirent test equipment, the 2 ethern= et 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 equipm= ent. 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 b= e really helpful


Regards,

Mehul


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