Datasheet

15-22
Cisco ONS 15454 SDH Reference Manual, R7.0
October 2008
Chapter 15 Performance Monitoring
15.6.2 G-Series Ethernet Card Performance Monitoring Parameters
15.6.2.2 G-Series Ethernet Utilization Window
The Utilization window shows the percentage of Tx and R) 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 menu 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 VC is shown in Table 15-8 on
page 15-20.
Note Line utilization numbers express the average of ingress and egress traffic as a percentage of capacity.
Rx Giants Number of packets received that are greater than 1530 bytes in length.
Rx Pause Frames Number of received Ethernet IEEE 802.3z pause frames.
Tx Pause Frames Number of transmitted IEEE 802.3z pause frames.
Rx Pkts Dropped Internal
Congestion
Number of received packets dropped due to overflow in G-Series frame
buffer.
Tx Pkts Dropped Internal
Congestion
Number of transmit queue drops due to drops in the G-Series frame
buffer.
HDLC Errors High-level data link control (HDLC) errors received from SDH/SONET.
Do not use the HDLC errors counter to count the number of frames
dropped because of HDLC errors, because each frame can fragment into
several smaller frames during HDLC error conditions and spurious
HDLC frames can also be generated. If HDLC error counters are
incrementing when no SDH path problems should be present, it might
indicate a problem with the quality of the SDH path. For example, a
SDH protection switch generates a set of HLDC errors. But the actual
values of these counters are less significant than the fact they are
changing.
Rx Unicast Packets Number of unicast packets received since the last counter reset.
Tx Unicast Packets Number of unicast packets transmitted.
Rx Multicast Packets Number of multicast packets received since the last counter reset.
Tx Multicast Packets Number of multicast packets transmitted.
Rx Broadcast Packets Number of broadcast packets received since the last counter reset.
Tx Broadcast Packets Number or broadcast packets transmitted.
Table 15-10 G-Series Ethernet Statistics Parameters (continued)
Parameter Meaning