Problem: I have 19 cisco 2600 routers. When I connect two of them in serial 1 links nothing happens.
Test: I wanted to see if it was my serial card, but it isn't. serial 0 works great. That is for all 19 routers. I had the same problem before two years ago. I had to do something to the routers , but I don't remember.
Solution: Nothing right now.
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