Display Alarms and Errors for Channelized DS-3 Interfaces

Action

To display channelized DS-3 alarms and errors, use the following JUNOS command-line interface (CLI) operational mode command:

user@host> show interfaces t1-fpc/pic/port:channel extensive

Sample Output 1

user@host> show interfaces t1-1/2/0:5 extensive      

Physical interface: t1-1/2/0:5, Enabled, Physical link is Up

  Interface index: 181, SNMP ifIndex: 210, Generation: 96

  Description: T1 to Tombstone - Circuit # 123456789

  Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: 
None, FCS: 16, Framing: ESF,

  Parent: ct3-1/2/0 Interface index 173

  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 60 seconds, Up-count 1, Down-count 3

  Keepalive statistics:

    Input : 6910 (last seen 00:00:21 ago)

    Output: 6886 (last sent 00:00:04 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   : 2004-05-11 16:01:30 EDT (5d 02:53 ago)

  Statistics last cleared: 2004-05-11 23:43:42 EDT (4d 19:10 ago)

  Traffic statistics:

   Input  bytes  :            551301316                 4432 bps

   Output bytes  :           4091306894                 2696 bps

   Input  packets:              5231609                    6 pps

   Output packets:              4867661                    3 pps

  Input errors:

    Errors: 47, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed 
discards: 398, L3 incompletes: 0, L2 channel errors: 0,

    L2 mismatch timeouts: 0, HS link CRC errors: 0, SRAM errors: 0

  Output errors:

    Carrier transitions: 0, Errors: 0, Drops: 0, Aged packets: 0

  Queue counters:       Queued packets  Transmitted packets      Dropped packets

    0 best-effort              4820512              4804578                24909

    1 expedited-fo                   0                    0                    0

    2 assured-forw                   0                    0                    0

    3 network-cont               63083                63083                    0

  DS1   alarms   : None

  DS1   defects  : None

  T1  media:            Seconds        Count  State

    SEF                       5            4  OK

    BEE                     246          127  OK

    AIS                       0            0  OK

    LOF                       0            0  OK

    LOS                       0            0  OK

    YELLOW                    0            0  OK

    BPV                       0            0

    EXZ                       0            0

    LCV                     246          538

    PCV                       0            0

    CS                        0            0

    LES                       0

    ES                        0

    SES                       8

    SEFS                     12

    BES                       0

    UAS                       0

  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)

  Packet Forwarding Engine configuration:

    Destination slot: 1, PLP byte: 4 (0x01)

  Logical interface t1-1/2/0:5.0 (Index 86) (SNMP ifIndex 238) (Generation 111)

    Flags: Point-To-Point SNMP-Traps Encapsulation: PPP

    Protocol inet, MTU: 1500, Generation: 117, Route table: 0

      Flags: None

      Addresses, Flags: Is-Preferred Is-Primary

        Destination: 68.71.141.32/30, Local: 68.71.141.33, Broadcast: 
68.71.141.35, Generation: 169

Sample Output 2

user@host> show interfaces t1-1/2/0:19 extensive     

Physical interface: t1-1/2/0:19, Enabled, Physical link is Down

  Interface index: 148, SNMP ifIndex: 224, Generation: 110

  Description: T1 to Rock City - Circuit # 987654321

  Link-level type: PPP, MTU: 1504, Clocking: Internal, Speed: T1, Loopback: 
None, FCS: 16, Framing: ESF,

  Parent: ct3-1/2/0 Interface index 173

  Device flags   : Present Running Down

  Interface flags: Hardware-Down Point-To-Point SNMP-Traps

  Link flags     : Keepalives

  Hold-times     : Up 0 ms, Down 0 ms

  Keepalive settings: Interval 60 seconds, Up-count 1, Down-count 3

  Keepalive statistics:

    Input : 0 (last seen: never)

    Output: 0 (last sent: never)

  LCP state: Conf-req-sent

  NCP state: inet: Down, inet6: Not-configured, iso: Not-configured, mpls: 
Not-configured

  CHAP state: Not-configured

  CoS queues     : 4 supported

  Last flapped   : 2004-05-14 15:56:43 EDT (2d 03:01 ago)

  Statistics last cleared: 2004-04-09 13:30:02 EDT (5w2d 05:28 ago)

  Traffic statistics:

   Input  bytes  :                89198                    0 bps

   Output bytes  :                90532                    0 bps

   Input  packets:                 6371                    0 pps

   Output packets:                 6448                    0 pps

  Input errors:

    Errors: 271124, Drops: 0, Framing errors: 0, Runts: 0, Giants: 0, Policed 
discards: 266254, L3 incompletes: 0,

    L2 channel errors: 2, L2 mismatch timeouts: 2, HS link CRC errors: 0, SRAM 
errors: 0

  Output errors:

    Carrier transitions: 32, Errors: 0, Drops: 0, Aged packets: 0

  Queue counters:       Queued packets  Transmitted packets      Dropped packets

    0 best-effort                    0                    0                    0

    1 expedited-fo                   0                    0                    0

    2 assured-forw                   0                    0                    0

    3 network-cont                6448                 6448                    0

  DS1   alarms   : AIS, LOF

  DS1   defects  : AIS, LOF

  T1  media:            Seconds        Count  State

    SEF                      33           31  OK

    BEE                      53           47  OK

    AIS                 3201537           15  Defect Active

    LOF                 3202041           16  Defect Active

    LOS                       0            0  OK

    YELLOW              1023435            0  OK

    BPV                       0            0

    EXZ                       0            0

    LCV                      53           72

    PCV                       0            0

    CS                        0            0

    LES                 3202041

    ES                  3202041

    SES                 3202060

    SEFS                3202102

    BES                       0

    UAS                 3202160

  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)

  Packet Forwarding Engine configuration:

    Destination slot: 1, PLP byte: 4 (0x04)

  Logical interface t1-1/2/0:19.0 (Index 91) (SNMP ifIndex 256) (Generation 115)

    Flags: Hardware-Down Device-Down Point-To-Point SNMP-Traps Encapsulation: 
PPP

    Protocol inet, MTU: 1500, Generation: 121, Route table: 0

      Flags: Protocol-Down

      Addresses, Flags: Dest-route-down Is-Preferred Is-Primary

        Destination: 68.71.141.136/30, Local: 68.71.141.137, Broadcast: 
68.71.141.139, Generation: 179

What It Means

The sample output shows the active alarms and active defects. Sample output 1 shows no active alarms or defects.

Sample output 2 shows that the physical and logical links are down, with active alarms and defects. 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 T1 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).

Table 50 shows T1 media-specific alarms or defects that can render the interface unable to pass packets.

Table 50: T1 Media Alarms and Error Definitions

T1 Media Alarm or Error	Definitions
AIS	Alarm indication signal (blue alarm)
BEE	Block error event
BES	Bursty errored seconds
BPV	Bipolar violation
CS	Controlled slip
ES	Errored seconds
EXZ	Excessive zeros
LCV	Line code violation
LES	Line errored seconds
LOF	Loss of frame
LOS	Loss of signal
PCV	Path code violation
SEF	Severely errored frame
SEFS	Severely errored frame seconds
SES	Severely errored seconds
UAS	Unavailable seconds
YLW	Yellow alarm

See Locate T1 Alarms and Errors for more details on T1 alarms and statistics.