Junos OS Interfaces Command Reference - Juniper Networks

Table 101: ATM show interfaces Output Fields (continued)
Field Name
SONET path
Received SONET
overhead
Transmitted
SONET overhead
SDH alarms
SDH defects
Field Description
Active alarms and defects, plus counts of specific SONET errors with detailed
information.
• Seconds—Number of seconds the defect has been active.
• Count—Number of times that the defect has gone from inactive to active.
• State—State of the error. State other than OK indicates a problem.
Subfields are:
Copyright © 2012, Juniper Networks, Inc.
• BIP-B3—Bit interleaved parity for SONET section overhead
• REI-P—Remote error indication
• LOP-P—Loss of pointer (path)
• AIS-P—Path alarm indication signal
• RDI-P—Path remote defect indication
• UNEQ-P—Path unequipped
• PLM-P—Path payload (signal) label mismatch
• ES-P—Errored seconds (near-end STS path)
• SES-P—Severely errored seconds (near-end STS path)
• UAS-P—Unavailable seconds (near-end STS path)
• ES-PFE—Errored seconds (far-end STS path)
• SES-PFE—Severely errored seconds (far-end STS path)
• UAS-PFE—Unavailable seconds (far-end STS path)
Values of the received and transmitted SONET overhead:
• C2—Signal label. Allocated to identify the construction and content of the
STS-level SPE and for PDI-P.
• F1—Section user channel byte. This byte is set aside for the purposes of users.
• K1 and K2—These bytes are allocated for APS signaling for the protection of
the multiplex section.
• J0—Section trace. This byte is defined for STS-1 number 1of an STS-N signal.
Used to transmit a 1-byte fixed-length string or a 16-byte message so that a
receiving terminal in a section can verify its continued connection to the
intended transmitter.
• S1—Synchronization status. The S1 byte is located in the first STS-1 of an
STS-N.
• Z3 and Z4—Allocated for future use.
SDH media-specific defects that can prevent the interface from passing packets.
When a defect persists for a certain period, it is promoted to an alarm. Based
on the router configuration, an alarm can ring the red or yellow alarm bell on
the router or light the red or yellow alarm LED on the craft interface. See these
fields for possible alarms and defects: SDH PHY, SDH regenerator section,
SDH multiplex section, and SDH path.
Chapter 12: ATM Interface Operational Mode Commands
Level of Output
extensive
extensive
All levels
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