Nortel Passport 8600 Configuring page 142

142 Chapter 4 Configuring and graphing ports
Table 34 RMON History tab fields
Field
SampleIndex
Utilization
Octets
Packets
BroadcastPkts
MulticastPkts
DropEvents
CRCAlignErrors
UndersizePkts
OversizePkts
314723-D Rev 01
Description
Uniquely identifies a specific etherStats entry. The value range is 1 to 65535.
If greater precision is required, you should sample the etherStstsPkts and
etherStatsOctets objects before and after a common interval. The differences in
the sampled values are Pkts and Octets, respectively. The number of seconds in
the interval is Interval. These values are used to calculate the utilization as
follows:
Utilization
The result of this equation is the value Utilization, which is the percent utilization
of the Ethernet segment on a scale of 0 to 100 percent.
The total number of octets of data (including those in bad packets) received on
the network (excluding framing bits but including FCS octets). You can use this
object as a reasonable estimate of Ethernet utilization. For greater precision,
sample the etherStatsPkts and etherStatsOctets objects before and after a
common interval.
The total number of packets (including bad packets, broadcast packets, and
multicast packets) received.
The total number of good packets received that were directed to the broadcast
address. Note that this number does not include multicast packets.
The total number of good packets received that were directed to a multicast
address. Note that this number does not include packets directed to the
broadcast address.
The total number of events in which packets were dropped by the probe due to
lack of resources during this interval. Note that this number is not necessarily
the number of packets dropped, it is just the number of times this condition has
been detected.
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 nonintegral number of octets (Alignment Error).
The total number of packets received that were less than 64 octets long
(excluding framing bits but including FCS octets) and were otherwise well
formed.
The total number of packets received that were longer than 1518 octets
(excluding framing bits but including FCS octets) and were otherwise well
formed.
× ( )
Pkts 9.6 6.4
+ +
= ---------------------------------------------------------------------------------------------
×
Interval 10000
( × )
Octets 0.8