Should I use a crossover cable to connect a cable modem to a router?

I need to hookup a business class cable modem that has 4 static IP ports to a router. In this case I am currently using an EdgeRouter 10-port which has a "PoE In" RJ45 socket.

Should I use a crossover cable to connect the modem to the router, or use a standard straight through patch cable?


Solution 1:

AFAIK, Since you are using relatively new devices, It doesn't really matter which cable you use. The machines will negotiate the actual parameters(bandwidth and so on) regardless of the type of cable.

Here is the another answer if you want more details, https://networkengineering.stackexchange.com/questions/34797/do-straight-though-and-crossover-still-have-any-play-in-todays-business

Solution 2:

T568A and T568B apply to plugs, ports do not "see" the colors of cables. Cables that have both plugs A or both B are straight and if you have A-B cable then it's crossover.
Check the specs of router and modem for Auto-MDX. If at least one of them supports it then it doesn't matter if you have straight or crossover cables. If neither supports it (which is very unlikely) then use crossover.