Junos OS Interfaces Command Reference - Juniper Networks

Table 124: Channelized OC show interfaces Output Fields (continued)
Field Name
Received SDH
overhead
Transmitted SDH
overhead
Received path trace
Transmitted path
trace
DS3 media
Field Description
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.
Channelized OC12 interfaces allow path trace bytes to be sent inband across
the SONET/SDH link. The received path trace value is the message received
from the router at the other end of the fiber. The transmitted path trace value
is the message that this router transmits. This information is specific to each of
the 12 channelized OC12 interfaces.
Counts of T3 media-specific errors. For detailed definitions of the T3 (DS-3)
error events (BPV, EXZ, LCV, PCV, and CCV) and performance parameters (LES,
PES, PSES, CES, CSES, SEFS, and UAS), see RFC 2496.
The DS3 or E3 media-specific error types can be:
• PLL Lock—Phase-locked loop out of lock
• Reframing—Frame alignment recovery time
• AIS—Alarm indication signal
• LOF—Loss of frame
• LOS—Loss of signal
• IDLE—Idle code detected
• YELLOW—Errors at the remote site receiver
• BPV—Bipolar violation
• EXZ—Excessive zeros
• LCV—Line code violation
• PCV—(DS3 only) Pulse code violation
• CCV—(DS3 only) C-bit coding violation
• FEBE—(DS3 only) Far-end block error
• LES—Line error seconds
Copyright © 2012, Juniper Networks, Inc.
• PES—(DS3 only) P-bit errored seconds
• PSES—(DS3 only) P-bit errored seconds (section)
• CES—(DS3 only) C-bit errored seconds
• CSES—(DS3 only) C-bit severely errored seconds
• SEFS—Severely errored framing seconds
• UAS—Unavailable seconds
Chapter 16: Channelized OC Interface Operational Commands
Level of Output
extensive
extensive
extensive
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