Table 145: T1 or E1 show interfaces Output Fields (continued)
Level of OutputField DescriptionField Name
extensiveOutput errors on the interface. The following paragraphs explain the counters
whose meaning might not be obvious:
• Carrier transitions—Number of times the interface has gone from down to up.
This number does not normally increment quickly, increasing only when the
cable is unplugged, the far-end system is powered down and up, or another
problem occurs. If the number of carrier transitions increments quickly
(perhaps once every 10 seconds), the cable, the far-end system, or the PIC
or PIM is malfunctioning.
• Errors—Sum of the outgoing frame aborts and FCS errors.
• Drops—Number of packets dropped by the output queue of the I/O Manager
ASIC. If the interface is saturated, this number increments once for every
packet that is dropped by the ASIC's RED mechanism.
• Aged packets—Number of packets that remained in shared packet SDRAM
so long that the system automatically purged them. The value in this field
should never increment. If it does, it is most likely a software bug or possibly
malfunctioning hardware.
• MTU errors—Number of packets whose size exceeded the MTU of the interface.
• Resource errors—Sum of transmit drops.
Output errors
detail extensiveCoS queue number and its associated user-configured forwarding class name.
• Queued packets—Number of queued packets.
• Transmitted packets—Number of transmitted packets.
• Dropped packets—Number of packets dropped by the ASIC's RED mechanism.
Queue counters
detail extensive noneE1 media-specific defects that can prevent the interface from passing packets.
When a defect persists for a certain amount of time, 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 turn on the red or yellow alarm LED on the craft interface.
The following lists all possible alarms and defects. For complete explanations
of most of these alarms and defects, see Bellcore Telcordia GR-499-CORE.
• AIS—Alarm indication signal.
• LOF—Loss of frame.
• LOS—Loss of signal.
• YLW—Yellow alarm. Indicates errors at the remote site receiver.
DS1 alarms
DS1 defects
2513Copyright © 2017, Juniper Networks, Inc.
Chapter 42: Operational Commands
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