Hi
My setup is as follows:
Network 1: PC1 (eth0) is connected to PC2 (eth0)
Network 2: PC2 (eth1) is connected to PC3 (eth0)
All eth devices use the e1000 driver. (Version 7.2.9, from Intel's website)
Network 1 is used for user interfacing, and will always be standard Ethernet.
Network 2 can switch between standard Ethernet and RTnet. (RTnet is used for operations, standard Ethernet for software updates etc.). PC2 functions as a gateway when both networks are configured as standard Ethernet.
After bootup both networks are standard Ethernet, and everything seems OK. For a while after I switch Network 2 to RTnet everything seems ok, but after about 73 seconds the inet address of PC2's eth0 changes from 172.0.0.3 to 172.17.101.138 for a second or so, and then eth0 goes totally down. (I have no idea where this "172.17.101.138" comes from). Network 2 (RTnet) still functions.
If I then manually bring PC2's eth0 back up, everything works OK again.
The same happens when I switch Network 2 from RTnet to standard Ethernet.
"dmesg" doen't give any info when this happens. Does anybody know wat the issue can be, or at least places where I can look for the problem? Is it perhaps the sequence of events that is somehow wrong?
I have attached the script which switches Network 2 from Ethernet to RTnet.
Thanks
Thinus Viljoen
### script to switch Network 2 from standard Ethernet to RTnet, for PC2
echo 0 > /proc/sys/net/ipv4/ip_forward
rmmod e1000
sleep 4
insmod /usr/local/rtnet/modules/rtnet.ko
insmod /usr/local/rtnet/modules/rtipv4.ko
insmod /usr/local/rtnet/modules/rtpacket.ko
insmod /usr/local/rtnet/modules/rt_e1000.ko cards=0,1,0,0
sleep 4
/usr/local/rtnet/sbin/rtifconfig rteth0 up 10.0.0.3 netmask 255.255.255.128
sleep 1
#Bring Network 1 back up on PC2
if [ $Node = PC2 ]
then
modprobe e1000
sleep 4
ifconfig eth0 172.0.0.3
sleep 1
fi
### end of script
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