09-04-2008 06:15 AM - edited 03-03-2019 11:24 PM
Pulled out 3 1700 series routers for a project I have coming up. All 3 are giving me "Serial0 is down, line protocol is down". Am I missing something because I cant believe that they are all faulty?
09-04-2008 06:28 AM
Hello Walter,
how are these serial interfaces connected?
how they are configured ?
Is one side configured for providing clock with clock rate command ?
Hope to help
Giuseppe
09-04-2008 08:21 AM
What are the serial interfaces currently plugged into? down/down state means the physical layer is down. If you would like to test out the interfaces & don't have a T1 to connect them to, you can either make a T1 loopback plug...Pin 1 goes to 4 & 2 goes to 5, or make a T1 crossover cable and connect one router to the other.
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