To generate a statistical graph:Port Statistics variables consist of counters for layer II , RMON & MIB II counters.
To generate a statistical graph:
Select the MIB variable(s) to poll by moving them from the Optional Counters list to the Selected list.
To
select a variable to be polled: In the Optional Counters pane,
double click the variable, or select the variable and click 
. The variable is moved to the Selected pane.
To
remove a variable so it is not polled: In the Selected pane, double
click the variable, or select the variable and click 
.
The variable is moved to the Optional Counters pane.
Click 
. The requested graph is displayed.
To load a previously saved
graph configuration:
Press
the 
button
or
From the Menu select Graph and then Load configuration from File
The Open File window is displayed.
From the Open File window select the saved graph configuration. The graph configuration is opened.
Total octets received (ifInOctets) - The total number of octets received on the interface, including framing characters.
Subnetwork-unicast packets delivered (ifInUcastPkts) - The number of subnetwork-unicast packets delivered to a higher-layer protocol.
Input discarded packets - fine packets (ifInDiscards) - The number of inbound packets which were chosen to be discarded even though no errors had been detected to prevent their being deliverable to a higher-layer protocol. One possible reason for discarding such a packet could be to free up buffer space.
Input packets with errors, not delivered (ifInErrors) - The number of inbound packets that contained errors preventing them from being deliverable to a higher-layer protocol.
Total octets transmitted (ifOutOctets) - The total number of octets transmitted out of the interface, including framing characters.
RMON CRC&Align error frames (etherStatsCRCAlignErrors) - 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 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).
RMON Drop Events (etherStatsDropEvents) - The total number of events in which packets were dropped by the probe due to lack of resources. Note that this number is not necessarily the number of packets dropped; it is just the number of times this condition has been detected.
RMON Fragments (etherStatsFragments) - The total number of packets received that were less than 64 octets in length (excluding framing bits but including FCS octets) and 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). Note that it is entirely normal for etherStatsFragments to increment. This is because it counts both runts (which are normal occurrences due to collisions) and noise hits.
RMON Frames of 64 bytes (etherStatsPkts64Octets) - The total number of packets (including bad packets) received that were 64 octets in length (excluding framing bits but including FCS octets).
RMON Frames of 65 to 127 bytes (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).
RMON Frames of 128 to 255 bytes (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).
RMON Frames of 256 to 511 bytes (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).
RMON Frames of 512 to 1023 bytes (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).
RMON Frames of 1024 to 1518 bytes (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).
RMON Jabbers
(etherStatsJabbers) - The total number of packets received that
were longer than 1518 octets (excluding framing bits, but including FCS
octets), and 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).
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.
RMON Oversize packets (etherStatsOversizePkts) - The total number of packets received that were longer than 1518 octets (excluding framing bits, but including FCS octets) and were otherwise well formed.
RMON Packets received to broadcast address (etherStatsBroadcastPkts) - The total number of good packets received that were directed to the broadcast address. Note that this does not include multicast packets.
RMON Packets received to multicast address (etherStatsMulticastPkts) - 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.
RMON Total
number of collisions (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. (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.
RMON Total number of octets received (etherStatsOctets) - The total number of octets of data (including those in bad packets) received on the network (excluding framing bits but including FCS octets). This object can be used as a reasonable estimate of ethernet utilization. If greater precision is desired, the etherStatsPkts and etherStatsOctets objects should be sampled before and after a common interval. The differences in the sampled values are Pkts and Octets, respectively, and the number of seconds in the interval is Interval. These values are used to calculate the Utilization as follows:
Pkts * (9.6 + 6.4) + (Octets * .8)
Utilization = ------------------------------------------
Interval * 10,000
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.
RMON Total number of packets received (etherStatsPkts) - The total number of packets (including bad packets, broadcast packets, and multicast packets) received.
RMON Undersize packets (etherStatsUndersizePkts) - 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.