Step 3: Monitor Statistics for an ATM1 Interface

Action

To monitor statistics for an ATM1 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-2/0/0

host                          Seconds: 68                  Time: 13:52:33

                                                               Delay: 0/0/2

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

Encapsulation: ATM-PVC, Speed: OC3

Traffic statistics:                                           Current delta

  Input bytes:                    1528168 (2142968 bps)           [1528000]

  Output bytes:                   1540192 (2165880 bps)           [1540000]

  Input packets:                     1002 (175 pps)                  [1000]

  Output packets:                    1002 (175 pps)                  [1000]

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:                  0                               [0]

  Output errors:                        0                               [0]

  Output drops:                         0                               [0]

  Aged packets:                         0                               [0]

ATM statistics:

  Input cell count                  33049                           [33034]

  Input invalid vc                      0                               [0]

  Output cell count           89231368868                        [23664462]

  Output idle cell count 18446744072746574220                    [23631438]

Active alarms : None

Active defects: None

SONET error counts/seconds:

  LOS count                             0                               [0]

  LOF count                             0                               [0]

  SEF count                             0                               [0]

  ES-S                                  0                               [0]

  SES-S                                 0                               [0]

SONET statistics:

  BIP-B1                                0                               [0]

  BIP-B2                                0                               [0]

  REI-L                                 0                               [0]

  BIP-B3                                0                               [0]

  REI-P                                 0                               [0]

Received SONET overhead:  F1      : 0x00  J0        : 0x00Z

Next='n', Quit='q' or ESC, Freeze='f', Thaw='t', Clear='c', Interface='i'

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.