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From: Jim Jackson on 17 Dec 2009 18:11
In comp.os.linux.embedded Mark <mark_cruzNOTFORSPAM(a)hotmail.com> wrote:
> "Gil Hamilton" <gil_hamilton(a)hotmail.com> wrote in message
> news:Xns9CDC5FAAD33B1gilhamiltonhotmailco(a)85.214.113.135...
> > A "layer 2" switch does not have any MAC addresses. It has ports that
> > are attached to various other devices (routers, hosts, etc.).

> I think you're mistaken. Here is what the standard 802.1d says:

> 7.12.2 Bridge Ports

> The individual MAC Entity associated with each Bridge Port shall have a
> separate individual MAC Address.
> This address is used for any MAC procedures required by the particular MAC.
> ...

> It's true that the bridge does not need a MAC to _forward frames_, but
> unique addresses must be provided to allow some low-level protocols to
> function properly, for instance Full-duplex PAUSE, link aggregation control
> protocol and such.

.... and spanning tree
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