[dpdk-dev] [PATCH] i40e: add VEB switching support for i40e

Xu, Qian Q qian.q.xu at intel.com
Mon Jan 25 07:22:53 CET 2016

I have a quick check, VEB/VEPA/VSI is not i40e's specific, they are IEEE EVB terms. See below. 

IEEE EVB tutorial: http://www.ieee802.org/802_tutorials/2009-11/evb-tutorial-draft-20091116_v09.pdf

Virtual Ethernet Bridge (VEB) - This is an IEEE EVB term. A VEB is a VLAN Bridge internal to Fortville that bridges the traffic of multiple VSIs over an internal virtual network. 
Virtual Ethernet Port Aggregator (VEPA) - This is an IEEE EVB term. A VEPA multiplexes the traffic of one or more VSIs onto a single Fortville Ethernet port. The biggest difference between a VEB and a VEPA is that a VEB can switch packets internally between VSIs, whereas a VEPA cannot. 
Virtual Station Interface (VSI) - This is an IEEE EVB term that defines the properties of a virtual machine's (or a physical machine's) connection to the network. Each downstream v-port on a Fortville VEB or VEPA defines a VSI. A standards-based definition of VSI properties enables network management tools to perform virtual machine migration and associated network re-configuration in a vendor-neutral manner.


-----Original Message-----
From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Thomas Monjalon
Sent: Friday, January 22, 2016 6:16 PM
To: Tao, Zhe; Mcnamara, John
Cc: dev at dpdk.org
Subject: Re: [dpdk-dev] [PATCH] i40e: add VEB switching support for i40e

2016-01-21 14:49, Zhe Tao:
> VEB switching feature for i40e is used to enable the switching between 
> the  VSIs connect to the virtual bridge. The old implementation is 
> setting the  virtual bridge mode as VEPA which is port aggregation. 
> Enable the switching  ability by setting the loop back mode for the 
> specific VSIs which connect to PF  or VFs.
> Signed-off-by: Zhe Tao <zhe.tao at intel.com>

Is VEB something specific to i40e?
Please explain the acronyms VEB, VSI and VEPA in the commit log or in a doc dedicated to i40e. Having some design explanations in a doc would help to understand the changes and to contribute.

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