User guide

Table 3: T1 or E1 show interfaces Output Fields (continued)

Level of OutputField DescriptionField Name

detail extensive noneNumber of CoS queues configured.CoS Queues

None specifiedInput rate in bits per second (bps) and packets per second (pps).Input rate

None specifiedOutput rate in bps and pps.Output rate

detail extensiveTime when the statistics for the interface were last set to zero.Statistics last

cleared

detail extensiveNumber and rate of bytes and packets received and transmitted on the physical

interface.

• Input bytes—Number of bytes received on the interface.

• Output bytes—Number of bytes transmitted on the interface.

• Input packets—Number of packets received on the interface

• Output packets—Number of packets transmitted on the interface.

Traffic statistics

extensiveInput errors on the interface. The following paragraphs explain the counters

whose meaning might not be obvious:

• Errors—Sum of the incoming frame aborts and FCS errors.

• Drops—Number of packets dropped by the input 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.

• Framing errors—Number of packets received with an invalid frame checksum

(FCS).

• Policed discards—Number of frames that the incoming packet match code

discarded because they were not recognized or not of interest. Usually, this

field reports protocols that the Junos OS does not handle.

• L3 incompletes—Number of incoming packets discarded because they failed

Layer 3 (usually IPv4) sanity checks of the header. For example, a frame with

less than 20 bytes of available IP header is discarded.

• L2 channel errors—Number of times the software did not find a valid logical

interface for an incoming frame.

• L2 mismatch timeouts—Number of malformed or short packets that caused

the incoming packet handler to discard the frame as unreadable.

• HS link CRC errors—Number of errors on the high-speed links between the

ASICs responsible for handling the router interfaces.

• SRAM errors—Number of hardware errors that occurred in the static RAM

(SRAM) on the PIC or PIM. If the value of this field increments, the PIC or PIM

is malfunctioning.

• Resource errors—Sum of transmit drops.

Input errors

E1 Interfaces Feature Guide for Routing Devices