Junos OS Interfaces Command Reference - Juniper Networks

Table 74: T3 or E3 show interfaces Output Fields (continued)
Field Name
DSU configuration
DS3 (or E3) BERT
configuration
Packet Forwarding
Engine
configuration
CoS information
Logical Interface
Field Description
Copyright © 2012, Juniper Networks, Inc.
Information about the DSU configuration. The last three lines (Bit count, Error
bit count, and LOS information) are displayed only if a BERT has ever been run
on the interface.
• Compatibility mod—CSU/DSU compatibility mode: None, Larscom, Kentrox,
or Digital-Link.
• Scrambling—Payload scrambling: Enabled or Disabled.
• Subrate—Configured subrate setting. Applies only when Digital-Link
compatibility mode is used. The subrate can be Disabled or display units in
Kbps.
• FEAC loopbac—(T3) Whether a far-end alarm and control (FEAC) loopback
is Active or Inactive. This feature is used to send alarm or status information
from the far-end terminal back to the near-end terminal and to initiate T3
loopbacks at the far-end terminal from the near-end terminal.
• Response—Whether the FEAC signal is Enabled or Disabled.
• Count—Number of FEAC loopbacks.
BERT (bit error rate test) checks the quality of the line. This output appears
only when a BERT is run on the interface.
• BERT time period—Configured total time period that the BERT is to run.
• Elapsed—Actual time elapsed since the start of the BERT (in seconds).
• Induced error rate—Configured rate at which the bit errors are induced in the
BERT pattern.
• Algorithm—Type of algorithm selected for the BERT.
Information about the configuration of the Packet Forwarding Engine:
• Destination slot—FPC slot number.
• PLP byte—Packet Level Protocol byte.
Information about the CoS queue for the physical interface.
• CoS transmit queue—Queue number and its associated user-configured
forwarding class name.
• Bandwidth %—Percentage of bandwidth allocated to the queue.
• Bandwidth bps—Bandwidth allocated to the queue (in bps).
• Buffer %—Percentage of buffer space allocated to the queue.
• Buffer usec—Amount of buffer space allocated to the queue, in microseconds.
This value is nonzero only if the buffer size is configured in terms of time.
• Priority—Queue priority: low or high.
Chapter 6: Digital Transmission Interface Operational Mode Commands
• Limit—Displayed if rate limiting is configured for the queue. Possible values
are none and exact. If exact is configured, the queue transmits only up to the
configured bandwidth, even if excess bandwidth is available. If none is
configured, the queue transmits beyond the configured bandwidth if
bandwidth is available.
Level of Output
extensive
detail extensive none
extensive
extensive
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