Subject: Fw: Changing MAC addresses on ethernet interfaces?
To: None <>
From: Andrew Gillham <>
List: tech-net
Date: 01/16/2001 13:55:44
This didn't seem to make it yesterday.  Hmm.

----- Original Message -----
From: "Andrew Gillham" <>
To: <>
Sent: Monday, January 15, 2001 12:42 PM
Subject: Changing MAC addresses on ethernet inferfaces?

> Is anyone planning to add a mechanism to override the UAA on an
> ethernet card?
> I am working on a "Cisco Ether Channel" device (cec) that needs
> to change the MAC address on each interface.  Well, at least on
> the additional interfaces, basically I plan on cloning the MAC
> address of the first card assigned to the cec device.
> I would also like to have the ability of putting a virtual MAC
> on the cec device and have that propagated down to each member
> of the EtherChannel.
> I currently have code that more or less works, minus the problem
> of the MAC being wrong.  If I can fix that, then I should have
> a driver that can do outbound load balancing across up to 4
> interfaces.  Combine this with a Cisco switch(*) that supports the
> "set port channel" or "port group" commands, and it should be
> interesting.  Also, the 'cec' driver should be able to have a
> 'vlan' driver layered on top.  It will be sweet if it works :)
> Anyway, some generic method of changing the interface MAC address
> would be very useful, not just for this purpose either. (think
> ipv6)
> -Andrew
> (*) Note that some cheapo switches based on the VIA chipsets have
>   support for "bonding" ports 1/2 (and 8/9?) as well, at least
>   according to the VIA datasheet.  I have no idea what devices
>   might be using this chipset, or whether they enable this feature.