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HELP: problem with IXP425, Smartbit 200 and ethernet collisions: msg#00050

Subject: HELP: problem with IXP425, Smartbit 200 and ethernet collisions
Hi all,
this is my problem. I'm working with IXDP425 mother board and I want to test the NPE ethernet interface (IXP0 and IXP1) with SmartBit 200 device. I do a loop between Smartbit and IXDP425 using both ethernet interfaces. I'm using this version:

linux-2.4.19
patch-2.4.19-rmk6
patch-2.4.19-rmk6-ds1
patch-2.4.19-rmk6-ds1-ycc1
ixp425AccessLibrary

all this stuff was included in ixdp425-0.2.tar.gz packet. The ethernet interfaces are configured with two different subnet (IXP0=10.0.1.254 and IXP1=10.1.1.254) and I've set ip_forward=yes. When I generate a full duplex traffic with Smartbit between IXP0 and IXP1 I have some ethernet collision even at low rate. For this reason I can't mesure the minimum bandwidth without faillure. Is there any issue about collision problem for NPE ethernet when I use them at the same time ?

Regards,
Arty.

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