On Wed, 18 Mar 2020 at 19:49, Emmanuel Halbwachs <[email protected]> wrote:
> > Thanks. I'll upgrade and let the list know if it works without the FEC > > knob. > > Just upgraded to 19.4R1.10: same situation, FEC91 is needed to bring > 100G links up. 100GE standards either mandate FEC91 or do not mention it. But there is nothing at all wrong running FEC91 for example in LR4, a lot of good reasons to do so. The problem of course is, you have to somehow know if _this_ optic needs FEC91 or not, and as far as I know they rely on EEPROM to understand that , and that seems a bit fragile. Personally if I control both ends, I'd always run FEC91. You can fix problems before they become customer symptomatic and you can approve new circuit for service immediately, as FEC91 will be constantly sending data, so you'll immediately know at turn-up if link is good or not. No need for fragile ping-tests. Going forward, it's unlikely new standards without FEC will happen, as it's a cheap trick to add reach. -- ++ytti _______________________________________________ juniper-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/juniper-nsp
