Re: Recommended L2 switches for a new IXP

[Phil Bedard <bedard.phil () gmail com>]

For many people eliminating L2 switching and building on top of a L3 
network is a good thing, especially if you are using BGP as the control 
plane. 

I'm not sure I follow the two routers with 40GE interfaces if you are just 
building L2 domains to interconnect people.  

Phil 



On 1/20/15, 8:04 AM, "Marian Ďurkovič" <md () bts sk> wrote:

> On Mon, Jan 19, 2015 at 09:37:35PM -0500, Phil Bedard wrote:
> > I think in fairly short order both TRILL and 802.1AQ will be depercated 
> > in 
> > place of VXLAN and using BGP EVPN as the control plane ala Juniper 
> > QFX5100/Nexus 9300. 
>
> We also evaluated VXLAN for IXP deployment, since Trident-2 introduced HW
> support for it. But VXLAN does *not* create a network for you, it relies 
> on
> some existing underlying IP network, on top of which VXLAN creates 
> stateless
> tunnels.
>
> By using TRILL, we could connect 4 switches into a ring (or any other
> reasonable topology) and have a fully functional network with 
> shortest-path
> "routing" of L2 packets.
>
> With VXLAN, we'd need at least two additional IP routers with bunch of
> 40GE interfaces to perform the functions TRILL supports out of the box.
>
> Regards,
>
>   M.