On Fri, Aug 12, 2016 at 10:24 AM, Nick Hilliard <[email protected]> wrote:
> Tim Durack wrote: > > OSA measurement confirms this unexpected behavior. I have a case open > with > > Cisco to investigate optics turning on/off when router port is in a > > shutdown state. (C6880, SUP2T, 15.2(1)SY1a) > > this is device-dependent. On a juniper or extreme box, disabling the > interface does not affect the laser TX. On a Juniper, you can log into > the line card and manually power down the laser. On a Brocade (foundry), > it will put the laser into ALS mode, i.e. will turn up the laser every > couple of seconds to see what happens, but will otherwise stay down. > > In general, all inserted transceivers should be assumed to be > transmitting all the time, and that inspecting TX with your remaining > good eye would be a poor idea. > > Nick > > Thanks, this is very helpful. Definitely platform dependent, and possibly platform inconsistent. From a Cisco perspective, it seems that shutdown is normally TX off. For me this is less of a safety issue and more of a system matter. TX on/off is unexpected on an OSA measurement. TX on/off cycle also has an effect on EDFA AGC. -- Tim:> _______________________________________________ cisco-nsp mailing list [email protected] https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/
