[f-nsp] Link State Propagation over Ethernet

[Frank Bulk]

As I posted on the Calix Community for you today, Accedian NIDs and their link propagation feature that uses EVC status. =)

Frank

-----Original Message-----
From: foundry-nsp [mailto:foundry-nsp-bounces at puck.nether.net] On Behalf Of Richard Laager
Sent: Thursday, August 21, 2014 3:51 PM
To: foundry-nsp at puck.nether.net
Subject: Re: [f-nsp] Link State Propagation over Ethernet

A poster off-list suggested BFD.

Can you clarify this a bit? I think you're looking at the problem
backwards.

+------+   /---------\   +-----+
| MLXe | --  Network  -- | CER |
+------+   \---------/   +-----+
   |                        |
+------+                 +-----+
|  A   |                 |  B  |
+------+                 +-----+

When the "Network" fails, devices A & B (both of them) need to see their
Ethernet links go down.

If A & B supported BFD then I wouldn't need this link state propagation
behavior at all. They're black boxes that, per the vendor, are meant to
be directly connected.

So what I need is for the MLXe and the CER to communicate in some way
(MPLS / Ethernet OAM) and when that communication is interrupted, drop
the Ethernet link on the ports facing the devices.

My next best solution is that the vendor knows of some third-party
devices that can do exactly this behavior. I'll go that route if I can't
do it with the gear we already have.

-- 
Richard