NTAC Peering Working Group

[Michael H Lambert <>]

On 24 May 2013, at 10:04, Grover Browning wrote:

> Full mesh with MPLS FRR/BFD.

Trying to see past my knee-jerk, religious, "MPLS is Evil" initial reaction...

Let's assume that at some point in the not-too-distant future we have solid, 
full-featured implementations of OpenFlow version x.y, where ((what we need) 
<= x.y < (what we want)).  What do we want the IP-over-AL2S topology to look 
like at that time?  If it's a full mesh of SDN-configured paths, then why not 
start out with a topology that mimics that goal.  If it's not, then we might 
want to go in some other direction in the interim.  I would conjecture that a 
full mesh is a reasonable approach, at least until we have a tight(er) 
coupling among SDN, routing protocols and real-time flow switching.

As an alternative to MPLS/FRR/BFD, how about traditional VLANs on top of 
TRILL rather than spanning tree?

Michael