<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div>Not to mention being accurately calibrated back in the factory in the first place <br><br>Sent from my iPhone</div><div><br>On 29 Aug 2015, at 11:55 am, Lincoln Dale <<a href="mailto:ltd@arista.com">ltd@arista.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><br><div class="gmail_quote">On Fri, Aug 28, 2015 at 12:20 AM, Paul Wilkins <span dir="ltr"><<a href="mailto:paulwilkins369@gmail.com" target="_blank">paulwilkins369@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">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.</blockquote></div><br>You're making the assumption that transceivers both</div><div class="gmail_extra"> (a) accurately measure what they receive (hint: look at the +/- on the spec and be amazed at what the +/- is),</div><div class="gmail_extra"> (b) know their transmit power.</div><div class="gmail_extra"><br></div><div class="gmail_extra">Both are false assumptions.</div><div class="gmail_extra"><br><br clear="all"><div><div class="gmail_signature"><div dir="ltr"><div><div dir="ltr"><span style="color:rgb(136,136,136)"><font color="#888888"><font color="#888888">Lincoln Dale | <a href="mailto:ltd@arista.com" style="color:rgb(17,85,204)" target="_blank">ltd@arista.com</a></font></font></span><span style="color:rgb(136,136,136);font-size:12.8000001907349px"> </span><span style="color:rgb(136,136,136);font-size:12.8000001907349px">| </span>+1 408 547 5782<span style="color:rgb(136,136,136);font-size:12.8000001907349px"> </span><span style="color:rgb(136,136,136);font-size:12.8000001907349px">|</span><span style="color:rgb(136,136,136);font-size:12.8000001907349px"> </span>+1 650 391 8376</div></div></div></div></div>
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