Juniper MX2020 Hardware Manual page 570

For optimum router performance, verify the condition of the ADCs. The router can have up to twenty
ADCs mounted vertically in the line card cage at the front of the chassis. The MPCs are installed vertically
into the ADCs.
Action
On a regular basis:
Issue the CLI show chassis adc command to check the status of installed ADCs. As shown in the sample
output, the value Online in the column labeled State indicates that the ADC is functioning normally:
user@host> show chassis adc
Slot State
0 Empty
1 Empty
2 Empty
3 Empty
4 Online 1 hour, 26 minutes, 59 seconds
5 Empty
6 Empty
7 Online 1 hour, 26 minutes, 51 seconds
8 Online 1 hour, 26 minutes, 43 seconds
9 Empty
10 Offline--- No power ---
11 Online 1 hour, 26 minutes, 33 seconds
12 Empty
13 Empty
14 Empty
15 Present
16 Online 1 hour, 26 minutes, 25 seconds
17 Empty
18 Online 1 hour, 26 minutes, 16 seconds
19 Empty
For further description of the output from the command, see the
Command Reference.
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