HP Virtual Connect Flex-10 10Gb Ethernet Module for c-Class BladeSystem - Manual (Page 75)

Command line 75
Name RFC Description
rfc1213_Dot1dTpPortInFrame
s 1493 The number of frames that have been
received by his port from its segment.
Note that a frame received on the
interface corresponding to this port is
only counted by this object if and
only if it is for a protocol being
processed by the local bridging
function, including bridge
management frames.
rfc1757_StatsBroadcastPkts 1757 The number of good packets
received during this sampling
interval that were directed to the
broadcast address
rfc1757_StatsCRCAlignErrors 1757 The total number of packets received
that had a length (excluding framing
bits, but including FCS octets) of
between 64 and 1518 octets,
inclusive, but had either a bad Frame
Check Sequence (FCS) with an
integral number of octets (FCS Error)
or a bad FCS with a non-integral
number of octets (Alignment Error).
rfc1757_StatsCollisions 1757 The best estimate of the total number
of collisions n this Ethernet segment.
The value returned depends on the
location of the RMON probe. Section
8.2.1.3 (10BASE-5) and section
10.3.1.3 (10BASE-2) of IEEE
standard 802.3 states that a station
must detect a collision, in the receive
mode, if three or more stations are
transmitting simultaneously. A
repeater port must detect a collision
when two or more stations are
transmitting simultaneously. Thus a
probe placed on a repeater port
could record more collisions than a
probe connected to a station on the
same segment would.
Probe location plays a much smaller
role when considering 10BASE-T.
14.2.1.4 (10BASE-T) of IEEE
standard 802.3 defines a collision as
the simultaneous presence of signals
on the DO and RD circuits
(transmitting and receiving at the
same time). A 10BASE-T station can
only detect collisions when it is
transmitting. Thus probes placed on
a station and a repeater, should
report the same number of collisions.
An RMON probe inside a repeater
should ideally report collisions
between the repeater and one or