DTE/DCE?

rentaghost

If you have 3 sites and 3 routers A,B & C connected via a serial WAN link with B in the middle (A<->B<->C) would one typically set the clock rate on B for both its serial ports?

Would it really matter if A and C both were set to DCE instead?

I know one side has to be DCE and one DTE but is there a preferred way of thinking about this particular issue?

(Maybe it doesn't really matter at all apart from the fact that B is the central site so it could aid trobleshooting if more things were set here?)

Drakonblayde

If I'm not mistaken, for real WAN links, your router isn't going to be providing clocking, that'll come from the CSU/DSU, and your router will just be a DTE device. Since in most lab scenarios, you don't have a few T1's to hook your routers up to, you have to use the DCE/DTE cables and one of the devices has to provide the clocking.

But in answer to your question, clocking is done on a per link basis, not globally. You could set your lab up with the spoke routers doing the clocking if you wanted. Honestly, I don't pay attention to which end of the cable is which anymore in my lab, I just hook the things up, and set the clock rate on both routers hehe