[AusNOG] Acceptable dBM loss over SM cross connect in a datacentre

[Lincoln Dale]

On Fri, Aug 28, 2015 at 12:20 AM, Paul Wilkins <paulwilkins369 at gmail.com>
wrote:

> Not at the physical layer, no. Seems a missed opportunity this wasn't
> incorporated in the BFD protocol. It'd be a natural mix of synergy, control
> plane, link reliability, and TX power. I'd be tempted to post an RFC myself
> but for other irons in the fire etc.


You're making the assumption that transceivers both
 (a) accurately measure what they receive (hint: look at the +/- on the
spec and be amazed at what the +/- is),
 (b) know their transmit power.

Both are false assumptions.


Lincoln Dale | ltd at arista.com | +1 408 547 5782 |  +1 650 391 8376
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