I have two Linux hosts connected via category 6 wire. How do the LAN cards negotiate a link speed?
Essentially, I am trying to solidify if I am actually hammering a 1GbE NIC with traffic from a 10Gbe NIC or if they negotiated a 1GbE link speed.
autonegotiationethernet
I have two Linux hosts connected via category 6 wire. How do the LAN cards negotiate a link speed?
Essentially, I am trying to solidify if I am actually hammering a 1GbE NIC with traffic from a 10Gbe NIC or if they negotiated a 1GbE link speed.
Best Answer
A 10 Gb NIC connected directly to a 1 Gb either negotiates a 1 Gb connection, or it doesn't work at all. You cannot have the situation you describe unless you have something like a switch in between, where the 10 Gb NIC connects to a 10 Gb switch port.
It is very easy to search and find
ethernet speed negotiation
on the Internet, such as the Wikipedia article:Edit for the dumbed-down, plain-English version from Fluke, per your comment: