Dear Sir, i want only one ethernet port active at a time. so to acheive this how to use CONFIG_NET_MULTI. i have enabled one ethernet port at present i.e. FCC2. how to enable two ports so that when i ping or give network command its should ping depending upon selected port.

With Regards, Gurumurthy

On Tue, 27 Oct 2009 14:09:51 +0530 wrote

Dear "Gurumurthy Gowdar",

In message you wrote:

please let me know how to enable two Ethernet Ports in

U-boot for MPC8280 at booting time. After booting i should be able to ping the two ports i.e. FCC1 and FCC2 only by connecting the ethernet cable to the repective port (FCC1 & FCC2.

You don't. You don;t do this at all.

U-Boot does not enable any peripherals "at booting time". This is a design principle, see http://www.denx.de/wiki/view/U-Boot/DesignPrinciples#2_Keep_it_Fast

Ethernet ininitlization is only done when U-Boot attempts to perform a network command, and then only that single interface gets initialized which U-Boot is going to use.

currently i have enabled one port FCC2 as ethact port, can i change this depending by which port i want to ping.

Yes, you can toggle between several ports. But keep in mind that only one of them will be active at any time, if any at all.

i came to know about CONFIG_NET_MULTI whether this will be the solution for using two ports at a time.

You cannot use two ports at the same time, only one or the other. But it is possible to switch at runtime (either automatically when a download fails or manually by setting the "ethact" environment variable accordingly).

Best regards,

Wolfgang Denk