On Mon, 4 May 2020 at 23:06, Ethan O'Toole <telmnstr@757.org> wrote:
We found a bug on the 64 port x 100gig model that if you insert a quad twinax 10gig fanout cable in many of the ports it will trigger a reboot.I
I've seen a similar issue in another vendor, where specific SFP inserted would reload the linecard. This was because the SFP didn't answer fast enough to I2C queries and the polling code couldn't handle the error so it crashed the whole linecard. Vendor didn't fix the code, because it didn't happen on vendor optic, while obviously they must have understood they can't guarantee vendor optic answers in a timely manner in I2C. I2C is a pretty terrible bus, particularly if you try to actually hang everything off of a single I2C bus, single misbehaving speaker and you might get your power supplies offline. Hopefully we'll move to I3C or 10SPE Ethernet soon. Or maybe some sort of I2C switch where every connection is on its own bus. -- ++ytti