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Re: [lwip-users] Changing MAC address of network interface?

From: Noam Weissman
Subject: Re: [lwip-users] Changing MAC address of network interface?
Date: Thu, 7 Apr 2016 14:51:53 +0000


No reason you could not.

If your TCP stack sends data before you change the MAC the older MAC address is 
saved by the router/switch
It is connected to.. also it make sense that some packets are saved within the 
TCP stack buffering with the
older MAC address (before you change it).

I am changing MAC address all the time as I am developing boards and every new 
board has a default MAC
Before it is changed.

What I am saying that you can change MAC address on the fly but I think it's 
better to do it before you connect
the cable and start data transfer.


-----Original Message-----
From: address@hidden [mailto:address@hidden On Behalf Of Freddie Chopin
Sent: Thursday, April 07, 2016 5:43 PM
To: address@hidden
Subject: Re: [lwip-users] Changing MAC address of network interface?

On czw, 2016-04-07 at 14:34 +0000, Noam Weissman wrote:
> Just a small addition. You can change  net_if.hwaddr[]  on the fly for 
> testing etc but I think it is better t reboot after that.

You can change MAC address on your PC, so I'm wondering whether this is 
possible and easy with lwIP. "Easy" meaning doing that by simply changing 
hwaddr contents instead of de-initializing netif and initializing it again.


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