Weird network troubles

[Philippe Sainte-Marie <psm@wooe.org>]

Hi

I'm having troubles with my Ultra5 and RTL8139 PCI Ethernet card.

Here is what happens:

eth0 is integrated Sun Ethernet Adapter with local ip  192.168.1.42
01:01.1 Ethernet controller: Sun Microsystems Computer Corp. Happy Meal 
(rev 01)

eth1 is RTL8139 PCI Ethernet card with local ip 192.168.1.43
02:01.0 Ethernet controller: Realtek Semiconductor Co., Ltd. 
RTL-8139/8139C/8139C+ (rev 10)

module is loaded properly
Module                  Size  	Used by   Not tainted
ipv6                  	174504  -1 
8139too                15264   	1 
mii                     	3328   	0 		 [8139too]

when i unplug the cable from eth1 (RTL Card) and eth0 is connected
i can ping both interface even if one is not connected

when i unplug the cable from eth0 (Sun eth) and eth1 is connected
i can't ping anything.

i really don't understand how this is possible !

Any help would be great

-- 
Philippe Sainte-Marie <psm@wooe.org>