I'm working on a CCNA lab and trying to figure out why my S0/0 interface is showing - Serial0/0 is up, line protocol is up (looped). Routers are Cisco 1700. Version 12.2(4r)XL,
--Neither interface would allow me to put a clock rate. I am getting a message saying "
This command applies only to DCE interfaces".........However the book says (if you have a WIC-1DSU-T1, dont confuse with WIC-1T, use the service-module T1 clock source internal command instead. I did this and the other alternate command provided for the other interface. Thats when both interfaces "went up up".......but looped
--On the hardware ports themselves it says - T1 DSU CSU
--I have green lights for CD next to port.
--LP is amber for 1 of the 2
--Tried other cables the lab provided.
--Tried shutting down the interfaces and bringing them back up.
-- 2 IP addresses used for each Serial int - 192.168.131.1 / 24 and 192.168.131.3 /24.
- As of right now, no errors are showing up in the Interfaces but I did see some yesterday and cleared counters.