This blog has a pretty good runthrough - http://fmad.io/blog-100g-ethernet.html
Scroll down to "100G PROTOCOLS". On Tue, Dec 19, 2017 at 8:38 AM, Baldur Norddahl <baldur.nordd...@gmail.com> wrote: > Hello, > > Some optics are implemented with multiple lasers such as QSFP+ with 4x 10G > = 40G or QSFP28 with 4x 25G = 100G. How is the ethernet traffic load > balanced between those lanes? Is it bit by bit or more like LACP (packet by > packet)? > > I need to make sure my solution will handle 10G streams correctly. We have > a problem with N x 10G and LACP because our L2VPN MPLS endpoints are > lacking the flow label support. If I sell a 10G circuit to a customer and > uses a L2VPN to transport his port, everything may go on the same sub > channel. LACP will not load balance correctly, because it only sees the > outer MAC address for hashing, which is the same for all packets. > > Now we are worried that multi lane optics might have the exact same > problem. > > Regards, > > Baldur > >
