[U-Boot-Users] ethact, ethprim and NET_MULTI

Ben Warren bwarren at qstreams.com
Thu Mar 8 21:06:30 CET 2007

--- vb <vb at vsbe.com> wrote:

> Greetings,
> I am trying to bring up a system with two ethernet
> interfaces, and
> don't seem to be able to understand the intended
> behavior of the
> multiinterface system.
> Say when one tries pinging over an interface which
> is down, u-boot
> starts browsing over registered ethernet interfaces,
> making the next
> one in the list active and so on. So, after the ping
> attempt the
> current interface value could change.
> Is this really what is required - changing the
> active interface with
> the user unaware of it?
This is how it works.  The user is hardly unaware,

> What are the semantics of the environment variables
> "ethprim" and
> "ethact"?.I tried to look through the documentation,
> and found
> nothing.
'ethprime' lets you specify which interface to try
first.  'ethact' points to the interface that is
currently active.  It is modified by the Ethernet
driver and you should only touch it if you want to
override for some reason.


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