Most implementations will detect this and fall back to 100. On Oct 3, 2017 4:13 PM, "Chuck McCown" <[email protected]> wrote:
>From wikipedia: Since negotiation takes place on only two pairs, if two gigabit devices are connected through a cable with only two pairs, the devices will successfully choose 'gigabit' as the highest common denominator (HCD), but the link will never come up. So, you can have a bad single connection or a bad pair or even two bad pairs and a GigE (1000 Base T) connection will choose Gig but never come up or perhaps flop. That was an ungood choice by some engineer at some point in time.
