Hello Experts - Firstly thanks for the patience involved in answering my questions. I've only recently started working with our 3825 gateway and I am hoping to gain more understanding, and my coworkers are not able to answer my questions. I've studied the command reference guides, but they don't really explain the why/differences in what I see, just the expected output. I've attached a file with the output of 3 commands and have the following questions:
show controllers t1
1. Regarding "show int" why are these (Serial0/1/0:0 - Serial0/1/0:22 is down) reported down but Serial0/1/0:23 is up, shouldn't they ALL be "up"? Don't they take calls / data?
and also, why isn't listing for 0/1/1 the same? Instead I see Serial0/1/1:1 is up, but no details for Serial0/1/1:0 - Serial0/1/1:22. What's the difference?
2. for "show controllers" I get only listings for GigabitEthernet0/0, GigabitEthernet0/1, Interface Serial0/1/0:23, Interface Serial0/1/1:1, Interface Serial0/2/0:23.
two questions - why no details for the individual ds0's like in "show int" (Serial0/1/0:0 - Serial0/1/0:22)? These are not considered "controllers" I can presume? So then, can you please articulate the difference between a controller and an interface?
3. Finally, only when I issue "show controllers t1" do I see a listing for T1 0/2/1, why did this not show up in "show controllers command?
Thanks so much for your help.