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Junos OS Interfaces Command Reference - Juniper Networks

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<strong>Junos</strong> <strong>OS</strong> 12.1 <strong>Interfaces</strong> <strong>Command</strong> <strong>Reference</strong><br />

Table 147: Multilink Services show interfaces Output Fields (continued)<br />

Field Name<br />

Link-level type<br />

MTU<br />

Device flags<br />

Interface flags<br />

Last flapped<br />

Statistics last<br />

cleared<br />

Traffic statistics<br />

Frame exceptions<br />

Buffering<br />

exceptions<br />

858<br />

Field Description<br />

Encapsulation being used on the physical interface: Multilink.<br />

MTU size on the physical interface.<br />

Information about the physical device. Possible values are described in the<br />

“Device Flags” section under “Common Output Fields Description” on page 125.<br />

Information about the interface. Possible values are described in the “Interface<br />

Flags” section under “Common Output Fields Description” on page 125.<br />

Date, time, and how long ago the interface went from down to up. The format<br />

is Last flapped: year-month-day hour:minute:second timezone (hour:minute:second<br />

ago). For example, Last flapped: 2002-04-26 10:52:40 PDT (04:33:20 ago).<br />

Time when the statistics for the interface were last set to zero.<br />

Number and rate of bytes and packets received and transmitted on the physical<br />

interface. All references to traffic direction (input or output) are defined with<br />

respect to the router. Input fragments received by the router are assembled into<br />

input packets; output packets are segmented into output fragments for<br />

transmission out of the router.<br />

Information about framing exceptions. Includes events recorded under Exception<br />

Events for each logical interface:<br />

• Oversized frames—Number of frames received that exceed maximum frame<br />

length. Maximum length is 4500 Kb (kilobits).<br />

• Errored input frames—Number of input frame errors.<br />

• Input on disabled link/bundle—Number of frames received on disabled links.<br />

These can result either from an inconsistent configuration, or from a bundle<br />

or link being brought up or down with traffic actively flowing through it.<br />

• Output for disabled link/bundle—Number of frames sent for a disabled or<br />

unavailable link. These can result either from an inconsistent configuration,<br />

or from a bundle being brought up or down with traffic actively flowing through<br />

it.<br />

• Queuing drops—Total number of packets dropped before traffic enters the<br />

link services IQ interface. Indicates that the interface is becoming<br />

oversubscribed.<br />

Information about buffering exceptions. Includes events recorded under<br />

Exception Events for each logical interface:<br />

• Packet data buffer overflow—Packet buffer memory is full. This overflow can<br />

occur when the aggregate data rate exceeds the physical multilink services<br />

interface capacity.<br />

• Fragment data buffer overflow—Fragment buffer memory is full. This overflow<br />

can occur when excessive differential delay is experienced across the links<br />

within a single bundle, or when the aggregate data rate exceeds the physical<br />

multilink services interface capacity. Check the logical interface exception<br />

event counters to determine which bundle is responsible.<br />

Level of Output<br />

All levels<br />

All levels<br />

All levels<br />

All levels<br />

detail extensive<br />

none<br />

detail extensive<br />

detail extensive<br />

extensive<br />

extensive<br />

Copyright © 2012, <strong>Juniper</strong> <strong>Networks</strong>, Inc.

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