Subject: Re: [PATCH net-next 02/10] net: phy: phylink: allow 10GKR interface to use in-band negotiation

From: Antoine Tenart <[email-masked]>
Date: Mon, 19 Mar 2018 14:10:09 +0100

Hi Andrew,

On Mon, Mar 19, 2018 at 01:59:53PM +0100, Andrew Lunn wrote:
> 
> If they don't have PHYs, how are the connected to the outside world?

On 7k/8k you have the following scheme for 10G only interfaces:

   MAC -- Comphy -- PHY -- SFP cage -- ...

Or

   MAC -- Comphy -- SFP cage -- ...

The comphy provides serdes lanes, and can be configured in various
modes (SGMII, 2500SGMII, 10GKR...).

Antoine

-- 
Antoine Ténart, Bootlin (formerly Free Electrons)
Embedded Linux and Kernel engineering
https://bootlin.com