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Monitoring Statistics for an ATM1 Interface
Purpose
To monitor statistics for an ATM1 interface, use the following Junos OS CLI operational mode command:
Action
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-2/0/0host 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'
Meaning
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. |
