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.