Step 3: Monitor Statistics for an ATM2 Interface

Action

To monitor statistics for an ATM2 interface, use the following JUNOS CLI operational mode command:

user@host> monitor interface at-fpc/pic/port

   
CAUTION: We recommend that you use this command only for diagnostic purposes. Do not leave it on during normal router operations because real-time monitoring of traffic consumes additional CPU and memory resources.


 

Sample Output

user@host> monitor interface at-2/2/0

host                          Seconds: 5                   Time: 17:16:49

                                                               Delay: 3/0/3

Interface: at-2/2/0, Enabled, Link is Up

Encapsulation: ATM-PVC, Speed: OC12

Traffic statistics:                                           Current delta

  Input bytes:                          0 (0 bps)                       [0]

  Output bytes:                      1600 (0 bps)                       [0]

  Input packets:                        0 (0 pps)                       [0]

  Output packets:                      18 (0 pps)                       [0]

Error statistics:

  Input errors:                         0                               [0]

  Input drops:                          0                               [0]

  Input framing errors:                 0                               [0]

  Policed discards:                     0                               [0]

  L3 incompletes:                       0                               [0]

  L2 channel errors:                    0                               [0]

  L2 mismatch timeouts:                 0                               [0]

  Carrier transitions:                  1                               [0]

  Output errors:                        0                               [0]

  Output drops:                         0                               [0]

  Aged packets:                         0                               [0]

ATM statistics:

  Input cell count                      4                               [0]

  Input invalid vc                      2                               [0]

  Output cell count           13908633088                         [8484369]

  Output idle cell count                0                               [0]

Active alarms : NoneActive defects: NoneSONET error countsZ             [0]  

What It Means

The sample output checks for and displays common interface failures and any increases in framing errors. Information from this command can help you narrow down possible causes of an interface problem.

NOTE: If you are accessing the router from the console connection, make sure you set the CLI terminal type using the set cli terminal command.