Juniper JUNOS OS 10.3 - SOFTWARE, Manual

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Table 491: show smp rmon history Output Fields (continued)
Field Description Field Name
The sample statistics taken at the specified interval.
•
Drop Events
—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.
•
Octets
—Total number of octets and packets. For Gigabit Ethernet IQ PICs,
the received octets count varies by interface type.
• Packets —Total number of packets.
•
Broadcast Packets —Number of broadcast packets.
•
Multicast Packets
—Number of multicast packets.
•
CRC errors
—Total number of packets received that had a length (excluding
framing bits, but including FCS octets) of between 64 and 1518 octets,
inclusive, and had either a bad FCS with an integral number of octets (FCS
error) or a bad FCS with a nonintegral number of octets (alignment error).
• Undersize Pkts —Number of packets received during this sampling interval
that were less than 64 octets long (excluding framing bits but including FCS
octets) and were otherwise well formed.
•
Oversize Pkts
—Number of packets received during the sampling interval that
were longer than 1518 octets (excluding framing bits, but including FCS octets)
but were otherwise well formed.
•
Fragments
—Total number of packets that were less than 64 octets in length
(excluding framing bits, but including FCS octets), and had either an FCS
error or an alignment error. Fragment frames normally increment because
both runts (which are normal occurrences caused by collisions) and noise
hits are counted.
•
Jabbers
—Number of frames that were longer than 1518 octets (excluding
framing bits, but including FCS octets), and had either an FCS error or an
alignment error. This definition of jabber is different from the definition in
IEEE-802.3 section 8.2.1.5 (10BASE5) and section 10.3.1.4 (10BASE2). These
documents define jabber as the condition in which any packet exceeds 20
ms. The allowed range to detect jabber is from 20 ms to 150 ms.
• Collisions —Number of Ethernet collisions. The Gigabit Ethernet PIC supports
only full-duplex operation, so for Gigabit Ethernet PICs, this number should
always remain 0. If it is nonzero, there is a software bug.
•
Utilization(%)
—The best estimate of the mean physical layer network
utilization on this interface during this sampling interval, in hundredths of a
percent.
Sample Index
show snmp rmon
history 1
user@host> show snmp rmon history 1
History Index 1:
Interface 171
show snmp rmon
history 1
Requested Buckets 50
Interval 10
Sample Index 1: Interval Start: Tue Feb 12 04:12:32 2008
Drop Events 0
Octets 486
Packets 2
Broadcast Packet 0
Multicast Packets 2
CRC errors 0
Undersize Pkts 0
Copyright © 2010, Juniper Networks, Inc. 3690
Complete Software Guide for Junos
®
OS for EX Series Ethernet Switches, Release 10.3