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Chapter 7: Using the Wireless-G Ethernet Bridge Web-based Utility
Wireless
Wireless-G Ethernet Bridge with 5-Port Switch
Octets (FCS Error) or a bad FCS with a non-integral number of octets (Alignment Error). Note that this definition of
jabber is different than 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 where any packet exceeds 20 ms. The allowed range to detect
jabber is between 20 ms and 150 ms.
EtherStatsCollisions - The best estimate of the total number of collisions on this Ethernet segment. The value
returned will depend 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. Note also that an RMON probe inside a repeater should ideally report collisions between the
repeater and one or more other hosts (transmit collisions as defined by IEEE 802.3k) plus receiver collisions
observed on any coax segments to which the repeater is connected.
EtherStatsPkts64Octets - The total number of packets (including bad packets) received that were 64 octets in
length (excluding framing bits but including FCS octets).
EtherStatsPkts65to127Octets - The total number of packets (including bad packets) received that were between
65 and 127 octets in length inclusive (excluding framing bits but including FCS octets).
EtherStatsPkts128to255Octets - The total number of packets (including bad packets) received that were between
128 and 255 octets in length inclusive (excluding framing bits but including FCS octets).
EtherStatsPkts256to511Octets - The total number of packets (including bad packets) received that were between
256 and 511 octets in length inclusive (excluding framing bits but including FCS octets).
EtherStatsPkts512to1023Octets - The total number of packets (including bad packets) received that were
between 512 and 1023 octets in length inclusive (excluding framing bits but including FCS octets).
EtherStatsPkts1024to1518Octets - The total number of packets (including bad packets) received that were
between 1024 and 1518 octets in length inclusive (excluding framing bits but including FCS octets).