Locate Channelized OC12 Alarms and Errors
Checklist for Channelized OC12 Alarms and Errors
Purpose
To check the most common Channelized OC12 alarms and errors encountered when investigating line problems on a Juniper Networks router.
Action
Table 1 provides links and commands for Channelized OC12 alarms and errors.
Table 1: Checklist for Channelized OC12 Alarms and Errors
Tasks | Command or Action |
|---|---|
| Display Channelized OC12 Alarms and Errors | show interfaces t3-fpc/pic/port:channel extensive |
| Display Channelized OC12 IQ Alarms and Errors | show interfaces interface-type-interface-name extensive |
Display Channelized OC12 Alarms and Errors
Purpose
To display Channelized OC12 interface alarms and errors, use the following Junos OS command-line interface (CLI) operational mode command:
Action
Sample Output 1
user@host> show interfaces t3-0/3/0:0 extensive
Physical interface: t3-0/3/0:0, Enabled, Physical link is Up
Interface index: 193, SNMP ifIndex: 118, Generation: 122
Link-level type: PPP, MTU: 4474, Clocking: Internal, SONET mode, Speed: T3,
Loopback: Local, SONET Loopback: None, FCS: 16, Mode: C/Bit parity
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Hold-times : Up 0 ms, Down 0 ms
CoS queues : 4 supported
Last flapped : 2004-05-21 15:23:34 UTC (01:59:02 ago)
Statistics last cleared: Never
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, Framing errors: 0, Bucket drops: 0, Policed discards: 0,
L3 incompletes: 0, L2 channel errors: 0, L2 mismatch timeouts: 0,
HS link CRC errors: 0, SRAM errors: 0
Output errors:
Carrier transitions: 1, Errors: 0, Drops: 0, Aged packets: 0
DS3 alarms : None
SONET alarms : None
DS3 defects : None
SONET defects : None
DS3 media: Seconds Count State
AIS 0 0 OK
LOF 0 0 OK
LOS 0 0 OK
IDLE 0 0 OK
YELLOW 0 0 OK
BPV 0 0
EXZ 0 0
LCV 0 0
PCV 0 0
CCV 0 0
LES 0
PES 0
PSES 0
CES 0
CSES 0
SEFS 0
UAS 0
HDLC configuration:
Policing bucket: Disabled
Shaping bucket : Disabled
Giant threshold: 4484, Runt threshold: 3
Idle cycle flag: flags, Start end flag: shared
DSU configuration:
Compatibility mode: None, Scrambling: Disabled, Subrate: Disabled
FEAC loopback: Inactive, Response: Disabled, Count: 0
DS-3 BERT configuration:
BERT time period: 10 seconds, Elapsed: 0 seconds
Algorithm: 2^3 - 1, Pseudorandom (1), Induced error rate: 10e-0
Interface transmit queues:
B/W WRR Packets Bytes
Queue0 0 0
Transmitted: 0 0
Drops: 0 0
Errors: 0
Queue1 0 0
Transmitted: 0 0
Drops: 0 0
Errors: 0
Queue2 0 0
Transmitted: 0 0
Drops: 0 0
Errors: 0
Queue3 0 0
Transmitted: 0 0
Drops: 0 0
Errors: 0
SONET PHY: Seconds Count State
PLL Lock 0 0 OK
PHY Light 0 0 OK
SONET section:
BIP-B1 1 22
SEF 0 0 OK
LOS 0 0 OK
LOF 0 0 OK
ES-S 1
SES-S 0
SEFS-S 0
SONET line:
BIP-B2 1 307
REI-L 0 0
RDI-L 3 1 OK
AIS-L 0 0 OK
BERR-SF 0 0 OK
BERR-SD 0 0 OK
ES-L 1
SES-L 0
UAS-L 0
ES-LFE 3
SES-LFE 3
UAS-LFE 0
SONET path:
BIP-B3 1 35
REI-P 1 7
LOP-P 0 0 OK
AIS-P 0 0 OK
RDI-P 0 0 OK
UNEQ-P 0 0 OK
PLM-P 1 1 OK
ES-P 1
SES-P 0
UAS-P 0
ES-PFE 1
SES-PFE 0
UAS-PFE 0
Received SONET overhead:
F1 : 0x00, J0 : 0x00, K1 : 0x00, K2 : 0x00
S1 : 0x00, C2 : 0x04, C2(cmp) : 0x04, F2 : 0x00
Z3 : 0x00, Z4 : 0x00, S1(cmp) : 0x00
Transmitted SONET overhead:
F1 : 0x00, J0 : 0x01, K1 : 0x00, K2 : 0x00
S1 : 0x00, C2 : 0x04, F2 : 0x00, Z3 : 0x00
Z4 : 0x00
Received path trace: t3-0/1/0:0
74 33 2d 30 2f 31 2f 30 3a 30 00 00 00 00 0d 0a t3-0/1/0:0......
Transmitted path trace: t3-0/3/0:0
74 33 2d 30 2f 33 2f 30 3a 30 00 00 00 00 00 00 t3-0/3/0:0......
Packet Forwarding Engine configuration:
Destination slot: 0, PLP byte: 1 (0x00)
CoS transmit queue Bandwidth Buffer Priority Limit
% bps % bytes
0 best-effort 95 42499200 95 0 low none
3 network-control 5 2236800 5 0 low none
Meaning
The sample output shows that there are no active alarms or active defects, either with the T3 media or the SONET layer. If alarms or errors occur, you must troubleshoot the T3 media or the SONET layer. For more information on diagnosing a T3 media problem or a SONET layer problem, see the topics in the Related Topics section.
When a major error (such as an alarm indication signal [AIS]) is seen for a few consecutive frames, a defect is declared within 1 second from detection. At the defect level, the interface is taken down and routing protocols are immediately notified (this is the default). In most cases, when a defect persists for 2.5 seconds plus or minus 0.5 seconds, an alarm is declared.
Notification messages are logged at the alarm level. Depending on the type of T3 alarm, you can configure the craft panel to display the red or yellow alarm LED and simultaneously have the alarm relay activate a physically connected device (such as a bell).
 | Note: T3 is a general term used to refer to the transmission of 44.736-Mbps digital circuits over any media. T3 can be transported over copper, fiber, or radio. DS3 is the term for the electrical signal found at the metallic interface for this circuit where most of the testing is performed. |
Table 2 shows T3 media-specific alarms or errors that can render the interface unable to pass packets.
Table 2: T3 Interface Error Counter Definitions
T3 Alarm or Error | Definition |
|---|---|
AIS | Alarm indication signal |
EXZ | Excessive zeros |
FERF | Far-end failures |
IDLE | Idle code detected |
LCV | Line code violation |
LOS | Loss of signal |
LOF | Loss of frame |
YLW | Remote defect indication (yellow alarm) |
PLL | Phase locked loop |
For more details on T3 alarms and statistics, see Checklist of Common T3 Alarms and Errors.
Display Channelized OC12 IQ Alarms and Errors
Purpose
To display Channelized OC12 IQ interface alarms and errors, use the following Junos OS CLI operational mode command:
Action
Sample Output 1
The following sample output is for a controller interface:
user@host> show interfaces coc12-0/0/0 extensive
Physical interface: coc12-0/0/0, Enabled, Physical link is Up
Interface index: 138, SNMP ifIndex: 82, Generation: 21
Link-level type: Controller, Clocking: Internal, SONET mode, Speed: OC12,
Loopback: None, Parent: None
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : None
Hold-times : Up 0 ms, Down 0 ms
CoS queues : 4 supported
Last flapped : 2004-05-18 21:25:45 UTC (2d 00:04 ago)
Statistics last cleared: Never
SONET alarms : None
SONET defects : None
SONET PHY: Seconds Count State
PLL Lock 0 0 OK
PHY Light 0 0 OK
SONET section:
BIP-B1 0 0
SEF 77 1 OK
LOS 77 1 OK
LOF 77 1 OK
ES-S 77
SES-S 77
SEFS-S 77
SONET line:
BIP-B2 0 0
REI-L 82584 1274876
RDI-L 5 1 OK
AIS-L 0 0 OK
BERR-SF 77 1 OK
BERR-SD 2 1 OK
ES-L 77
SES-L 77
UAS-L 67
ES-LFE 82589
SES-LFE 5
UAS-LFE 0
Received SONET overhead:
F1 : 0x00, J0 : 0x00, K1 : 0x00, K2 : 0x00
S1 : 0x00
Transmitted SONET overhead:
F1 : 0x00, J0 : 0x01, K1 : 0x00, K2 : 0x00
S1 : 0x00
Sample Output 2
The following sample output is for a T1 channel on a Channelized OC12 IQ interface:
user@host> show interfaces t1-0/0/0:2:1 extensive
Physical interface: t1-0/0/0:2:1, Enabled, Physical link is Up
Interface index: 186, SNMP ifIndex: 133, Generation: 69
Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1,
Loopback: None, FCS: 16, Framing: ESF,
Parent: coc1-0/0/0:2 Interface index 185
Device flags : Present Running
Interface flags: Point-To-Point SNMP-Traps
Link flags : Keepalives
Hold-times : Up 0 ms, Down 0 ms
Keepalive settings: Interval 10 seconds, Up-count 1, Down-count 3
Keepalive statistics:
Input : 444 (last seen 00:00:05 ago)
Output: 442 (last sent 00:00:09 ago)
LCP state: Opened
NCP state: inet: Opened, inet6: Not-configured, iso: Not-configured, mpls:
Not-configured
CHAP state: Not-configured
CoS queues : 4 supported
Last flapped : Never
Statistics last cleared: Never
Traffic statistics:
Input bytes : 10948 0 bps
Output bytes : 11792 0 bps
Input packets: 892 0 pps
Output packets: 940 0 pps
Input errors:
Errors: 2, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0,
Policed discards: 2, L3 incompletes: 0, L2 channel errors: 0,
L2 mismatch timeouts: 0, HS link CRC errors: 0, SRAM errors: 0
Output errors:
Carrier transitions: 1, Errors: 0, Drops: 0, Aged packets: 0
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 3 3 0
1 expedited-fo 0 0 0
2 assured-forw 0 0 0
3 network-cont 937 937 0
DS1 alarms : None
DS1 defects : None
T1 media: Seconds Count State
SEF 1 1 OK
BEE 2 2 OK
AIS 0 0 OK
LOF 108 1 OK
LOS 0 0 OK
YELLOW 0 0 OK
BPV 0 0
EXZ 0 0
LCV 1 1
PCV 0 0
CS 0 0
LES 108
ES 108
SES 108
SEFS 108
BES 0
UAS 116
HDLC configuration:
Policing bucket: Disabled
Shaping bucket : Disabled
Giant threshold: 1514, Runt threshold: 0
Timeslots : All active
Line encoding: B8ZS, Byte encoding: Nx64K
Buildout : 0 to 132 feet
Data inversion: Disabled, Idle cycle flag: flags, Start end flag: shared
DS1 BERT configuration:
BERT time period: 10 seconds, Elapsed: 0 seconds
Induced Error rate: 10e-0, Algorithm: 2^15 - 1, O.151, Pseudorandom (9)
SONET alarms : None
SONET defects : None
SONET vt:
BIP-BIP2 0 0
REI-V 25 25
LOP-V 93 1 OK
AIS-V 0 0 OK
RDI-V 0 0 OK
UNEQ-V 0 0 OK
PLM-V 93 1 OK
ES-V 93
SES-V 93
UAS-V 83
ES-VFE 25
SES-VFE 25
UAS-VFE 0
Received SONET overhead:
V5 : 0x02, V5(cmp) : 0x02
Transmitted SONET overhead:
V5 : 0x02
Packet Forwarding Engine configuration:
Destination slot: 0, PLP byte: 4 (0x00)
Logical interface t1-0/0/0:2:1.0 (Index 70) (SNMP ifIndex 134)
(Generation 15)
Flags: Point-To-Point SNMP-Traps Encapsulation: PPP
Protocol inet, MTU: 1500, Generation: 24, Route table: 0
Flags: None
Addresses, Flags: Is-Preferred Is-Primary
Destination: 20.20.20.4/30, Local: 20.20.20.5, Broadcast: 20.20.20.7,
Generation: 29
Meaning
The sample output shows that there are no active alarms or active defects. If alarms or errors occur, you must troubleshoot the channel media or the SONET layer. For more information, see the topics that correspond to the media with which you are working.
When a major error (such as an AIS) is seen for a few consecutive frames, a defect is declared within 1 second from detection. At the defect level, the interface is taken down and routing protocols are immediately notified (this is the default). In most cases, when a defect persists for 2.5 seconds plus or minus 0.5 seconds, an alarm is declared.
