am335x StarterKit dual Mac

Hi Dapan,

I unfortunately can't give any immediate insight into your issue. But just as an FYI I am going to delete your other repeat threads that you may have created by accident.

A few questions:

1) What OS/software are using? What version?

2) Would you mind explaining in a little more detail what functionality you are trying to implement? Could you explain what you mean by 'work well'?

Thanks!

Keegan

I assume the two Ethernet ports on the StraterKit are configured as an Ethernet switch.  You should never connect two ports of an Ethernet switch to the same network because it creates a loop.

You need to configure the two Ethernet ports to operate in dual MAC mode if you want to connect them to the same network.

Regards,
Paul

1.I used linux-3.2.0-psp04.06.00.08;

2.When I configed like this:ifconfig eth0 192.168.50.100; ifconfig eth0 192.168.60.200;   I could ping eth0 and eth1 from PC at the same time;

  But if I configed like :ifconfig eth0 192.168.50.100; ifconfig eth0 192.168.50.200;  They IP address at the same network segment,  I couldn't ping eth0 and eth1 from PC at the same time.

3. I refer to "http://processors.wiki.ti.com/index.php/TI81XX_PSP_ETHERNET_Switch_User_Guide#Switch_Mode_of_Operation" to config as Dual Standalone EMAC mode.

 Thanks.

What's the mean of  "If eth0 is up, then eth0 napi is used. eth1 napi is used when eth0 interface is down"  in "http://processors.wiki.ti.com/index.php/AM335x_CPSW_%28Ethernet%29_Driver%27s_Guide"? eth0 and eth1 couldn't work at the same time?

Can't say I fully understand the networking details but I was able to confirm Paul's statement (and your 2. above) on my Starter Kit by connecting the 2nd Ethernet port  (eth1) to an external (Belkin) router that obviously has a different subnet.  They key on the Matrix GUI was to pick the "eth1 enable" icon that does the following.

echo "-------------------------------------------------------------"
echo "Enable eth1 "
echo "-------------------------------------------------------------"
echo ""
# ifup eth1 - this fails under matrix
ifconfig eth1 up
sleep 1
udhcpc -i eth1
echo ""

To do NAT (we jokingly call it "IP Phone" mode if you only have 1 Ethernet drop in your cube), I connected 2 laptops through the Starter Kit i.e.

lab laptop <->[Starter Kit Eth1 Starter Kit Eth0]<->main laptop

After selecting the "et1_eth0 nat"  icon on the Matrix GUI icon that does the following

echo "-------------------------------------------------------------"
echo "Enable eth1 to eth0 nat "
echo "-------------------------------------------------------------"
echo ""
echo 1 >/proc/sys/net/ipv4/ip_forward
ifconfig eth1 192.168.30.1 up
udhcpd /etc/udhcpd_eth1.conf
iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE
echo "" 

 I was able to ping the lab laptop from the main laptop and vice-versa.

I can dig up logs if that helps any.  Also besides the Wiki links yoyu provided, there is some documentation in Chap 14 of AM335x_TRM_spruh73f.pdf.

Dapan Sun

In Linux both the Ethernet must be connected to different domains as Linux Network uses routing for forwarding the packets. Please refer below FAQ for reference
http://www.cisco.com/en/US/tech/tk365/technologies_q_and_a_item09186a008012d8f7.shtml#qa15

Regards
Mugunthan V N