G-Series Ethernet Utilization Window - Cisco ONS 15454 Reference Manual

Chapter 15 Performance Monitoring
Table 15-16
Parameter
Rx Unicast Packets
Tx Unicast Packets
Rx Multicast Packets
Tx Multicast Packets
Rx Broadcast Packets
Tx Broadcast Packets
Do not use the HDLC errors counter to count the number of frames dropped because of HDLC errors,
Note
because each frame can fragment into several smaller frames during HDLC error conditions and spurious
HDLC frames can be generated. If HDLC error counters are incrementing when no SONET path
problems should be present, it might indicate a problem with the quality of the SONET path. For
example, a SONET protection switch generates a set of HDLC errors. However, the actual values of these
counters are less significant than the fact that they are changing.

15.6.2.2 G-Series Ethernet Utilization Window

The Utilization window shows the percentage of Tx and Rx line bandwidth used by the Ethernet ports
during consecutive time segments. The Mode field displays the real-time mode status, such as 100 Full,
which is the mode setting configured on the G-Series port. However, if the G-Series port is set to
autonegotiate the mode (Auto), this field shows the result of the link negotiation between the G-Series
and the peer Ethernet device attached directly to the G-Series port.
The Utilization window provides an Interval drop-down list that enables you to set time intervals of
1 minute, 15 minutes, 1 hour, and 1 day. Line utilization is calculated with the following formulas:
Rx = (inOctets + inPkts * 20) * 8 / 100% interval * maxBaseRate
Tx = (outOctets + outPkts * 20) * 8 / 100% interval * maxBaseRate
The interval is defined in seconds. The maxBaseRate is defined by raw bits per second in one direction
for the Ethernet port (that is, 1 Gbps). The maxBaseRate for G-Series Ethernet cards is shown in
Table
Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
Note
Unlike the E-Series, the G-Series card does not have a display of Trunk Utilization statistics, because
Note
the G-Series card is not a Layer 2 device or switch.
OL-9217-01
G-Series Ethernet Statistics Parameters (continued)
Definition
Number of unicast packets received since the last counter reset.
Number of unicast packets transmitted.
Number of multicast packets received since the last counter reset.
Number of multicast packets transmitted.
Number of broadcast packets received since the last counter reset.
Number or broadcast packets transmitted.
15-14.
15.6 15.6.2 G-Series Ethernet Card Performance Monitoring Parameters
Cisco ONS 15454 Reference Manual, R7.0.1
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