Why does my fixed wireless(sprint broadband) modem take a crossover from it's ethernet port to my NIC? Layer 3(modem) to layer 2(NIC). I thought you only used a cross on devices at the same layer, like router to router. And what cable should I use if I add a router in between?? I would think -modem(cross)router(straight)NIC- but now I'm not sure.
Tek-Tips is the largest IT community on the Internet today!
Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!
-
Congratulations Chris Miller on being selected by the Tek-Tips community for having the most helpful posts in the forums last week. Way to Go!
Cable Type?
- Thread starter romebaby
- Start date
Your mixing apples and oranges here..
The crossover is not based on layers.. that is software.. layer 2 is bridging/switching and layer 3 is routing etc..
The crossover swaps Rx and Tx pairs
Rx------------Tx
Tx------------Rx
Normally yes, you need a crossover when connecting switch to switch because the hardware assumes one thing and you have done another.
Router to PC.. crossover needed.. if there is a hub between them.. two straight throughs will do.
MikeS
Find me at
"The trouble with giving up civil rights is that you never get them back"
The crossover is not based on layers.. that is software.. layer 2 is bridging/switching and layer 3 is routing etc..
The crossover swaps Rx and Tx pairs
Rx------------Tx
Tx------------Rx
Normally yes, you need a crossover when connecting switch to switch because the hardware assumes one thing and you have done another.
Router to PC.. crossover needed.. if there is a hub between them.. two straight throughs will do.
MikeS
Find me at
"The trouble with giving up civil rights is that you never get them back"
- Status
Similar threads
- Locked
- Question
- Locked
- Question