Monitoring ATM1 Interfaces
To monitor an ATM1 interface, follow these steps:
- Displaying the Status of a Specific ATM1 Interface
- Displaying Extensive Status Information for a Specific ATM1 Interface
- Monitoring Statistics for an ATM1 Interface
Displaying the Status of a Specific ATM1 Interface
Purpose
To display the status of a specific ATM interface, use the following Junos OS CLI operational mode command:
Action
Meaning
The first line of the sample output shows that the physical link is down and therefore the logical link is down also. This means that the interface cannot pass packets.
Further down the sample output, look for active alarms and defects. If there are any, and to further diagnose the problem, see Displaying Extensive Status Information for a Specific ATM1 Interface to display more extensive information about the ATM interface and the physical interface that is down.
Displaying Extensive Status Information for a Specific ATM1 Interface
Purpose
To display extensive status information about a specific interface, use the following Junos OS CLI operational mode command:
Action
Sample Output
user@host> show interfaces at-2/0/1 extensive Physical interface: at-2/0/1, Enabled, Physical link is Down
Interface index: 23, SNMP ifIndex: 43, Generation: 22
Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, SONET mode, Speed: OC3 , Loopback: None, Payload scrambler: Enabled
Device flags : Present Running Down
Link flags : None
Hold-times : Up 0 ms, Down 0 ms
Statistics last cleared: 2002-07-29 14:28:14 EDT (00:18:00 ago)
Traffic statistics:
Input bytes : 0 0 bps
Output bytes : 0 0 bps
Input packets: 0 0 pps
Output packets: 0 0 pps
Input errors:
Errors: 0, Drops: 0, Invalid VCs: 0, Framing errors: 0, Policed discards: 0, L3 incompletes: 0, L2 channel errors: 0,
L2 mismatch timeouts: 0
Output errors:
Carrier transitions: 0, Errors: 0, Drops: 0, Aged packets: 0
SONET alarms : LOL, LOS
SONET defects : LOL, LOF, LOS, SEF, AIS-L, AIS-P, RDI-P, PLM-P
SONET PHY: Seconds Count State
PLL Lock 0 0 OK
PHY Light 1079 0 Light Missing
SONET section:
BIP-B1 0 0
SEF 1079 0 Defect Active
LOS 1079 0 Defect Active
LOF 1079 0 Defect Active
ES-S 1079
SES-S 1079
SEFS-S 1079
SONET line:
BIP-B2 0 0
REI-L 0 0
RDI-L 0 0 OK
AIS-L 1079 0 Defect Active
BERR-SF 0 0 OK
BERR-SD 0 0 OK
ES-L 1079
SES-L 1079
UAS-L 1079
ES-LFE 0
SES-LFE 0
UAS-LFE 0
SONET path:
BIP-B3 0 0
REI-P 0 0
LOP-P 0 0 OK
AIS-P 1079 0 Defect Active
RDI-P 1079 0 Defect Active
UNEQ-P 0 0 OK
PLM-P 1079 0 Defect Active
ES-P 1079
SES-P 1079
UAS-P 1079
ES-PFE 1079
SES-PFE 1079
UAS-PFE 1079
Received SONET overhead:
F1 : 0x00, J0 : 0x00, K1 : 0xff, K2 : 0xff
S1 : 0x00, C2 : 0xff, C2(cmp) : 0x13, F2 : 0x00
Z3 : 0x00, Z4 : 0x00, S1(cmp) : 0x00, V5 : 0x00
V5(cmp) : 0x00
Transmitted SONET overhead:
F1 : 0x00, J0 : 0x01, K1 : 0x00, K2 : 0x00
S1 : 0x00, C2 : 0x13, F2 : 0x00, Z3 : 0x00
Z4 : 0x00, V5 : 0x00
ATM status:
HCS state: Hunt
LOC : OK
ATM Statistics:
Uncorrectable HCS errors: 0, Correctable HCS errors: 0, Tx cell FIFO overruns: 0, Rx cell FIFO overruns: 0,
Rx cell FIFO underruns: 0, Input cell count: 0, Output cell count: 381110991, Output idle cell count: 18446744069795695321,
Output VC queue drops: 0, Input no buffers: 0, Input length errors: 0, Input timeouts: 0, Input invalid VCs: 0,
Input bad CRCs: 0, Input OAM cell no buffers: 0
PFE configuration:
Destination slot: 2
CoS transmit queue Bandwidth Buffer Priority Limit
% bps % bytes
0 best-effort 0 0 0 0 low none
1 expedited-forwarding 0 0 0 0 low none
2 assured-forwarding 0 0 0 0 low none
3 network-control 0 0 0 0 low none
Logical interface at-2/0/1.10 (Index 30) (SNMP ifIndex 65) (Generation 29)
Flags: Device-Down Point-To-Point SNMP-Traps Encapsulation: ATM-SNAP
Traffic statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Local statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets: 0
Transit statistics:
Input bytes : 0 0 bps
Output bytes : 0 0 bps
Input packets: 0 0 pps
Output packets: 0 0 pps
Protocol inet, MTU: 4470, Flags: None, Generation: 32 Route table: 0
Addresses, Flags: Dest-route-down Is-Preferred Is-Primary
Destination: 192.168.100.0/30, Local: 192.168.100.1, Broadcast: Unspecified, Generation: 61
VCI 2.100
Flags: Active
Total down time: 0 sec, Last down: Never
ATM per-VC transmit statistics:
Tail queue packet drops: 0
Traffic statistics:
Input bytes : 0
Output bytes : 0
Input packets: 0
Output packets:
Meaning
The sample output is for an OC3 ATM interface and shows the statistics for the SONET media, as well as the Input and Output ATM errors. Error details include input and output errors, active alarms and defects, and media-specific errors.
If the physical link is down, look at the active alarms and defects for the ATM interface and check the ATM media accordingly. SeeList of Common ATM Alarms and Error for an explanation of ATM alarms.
Monitoring Statistics for an ATM1 Interface
Purpose
To monitor statistics for an ATM1 interface, use the following Junos OS CLI operational mode command:
Action
 | 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. |
