I have a point to point t1 between a 3810 router and 7206 router. The 3810 is using the T1 controler port and s2. The 7206 is using T1 4/3 and serial s4/3:0 for the connection. I am using HDLC. If I loop either controller, the opposite serial interface will see the loop and go up, up. When I connect them together they both go UP, DOWN. They are set up with ESF/B8ZS. There is an IP address set up on the serial interface. Why am I seeing the Line Protocol down on the serail interface?
Hi everyone, I would like to thank you in advance for any help you can provide a newcomer like myself!
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