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Re: Default eth hardware address is an eCos bug
- From: Martin Buck <martin dot buck at ascom dot ch>
- To: ecos-discuss at sources dot redhat dot com
- Date: Mon, 10 Dec 2001 09:47:07 +0100
- Subject: Re: [ECOS] Default eth hardware address is an eCos bug
- Newsgroups: local.ecos.discuss
- Organization: Ascom Systec AG
- References: <20011208183227.E11901@cericon.cranzgot.co.za>
Paul Sheer wrote:
> ./devs/eth/arm/flexanet/current/cdl/flexanet_eth_drivers.cdl
> contains a default hardware address as follows:
> default_value {"{0x11, 0x12, 0x13, 0x14, 0x15, 0x16}"}
IMNSHO, having a default hardware address at all is a bug. If you don't
have a proper hardware address for an interface, you shouldn't be able
to bring it up.
> The hardware address should be:
> default_value {"{0x0, 0x12, 0x13, 0x14, 0x15, 0x16}"}
> since most (all?) ethernet cards have the first byte zero.
There are quite a few starting with 08:.. these days. But at least the
LSB of the first Byte should be 0 - otherwise, it's a
multicast/broadcast address.
Martin