Specifications

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Cisco ONS 15454 Installation and Operations Guide, R3.2
March 2002
Chapter 9 Ethernet Operation
G1000-4 Performance and Maintenance Screens
Caution Use Loopback only for the initial test and turn-up of the card and SONET network tests. Do not put the
card in Loopback when the G1000-4 ports are in service and attached to a data network. Loopbacks can
corrupt the forwarding tables used in data networking.
Note For more information about using loopbacks with the ONS 15454, see the “Network Tests” section of
the Cisco ONS 15454 Troubleshooting and Maintenance Guide.
9.8.3 E-Series Ethernet Performance Screen
CTC provides Ethernet performance information that includes line-level parameters, the amount of port
bandwidth used, and historical Ethernet statistics.
9.8.3.1 Statistics Window
The Ethernet statistics screen lists Ethernet parameters at the line level. Table 9-14 defines the
parameters. Display the CTC card view for the Ethernet card and click the Performance > Statistics tabs
to display the screen.
The Baseline button resets the statistics values on the Statistics screen to zero. The Refresh button
manually refreshes statistics. Auto-Refresh sets a time interval for automatic refresh of statistics to
occur.
The G1000-4 Statistics screen also has a Clear button. The Clear button sets the values on the card to
zero. Using the Clear button will not cause the G1000-4 to reset.
Table 9-14 Ethernet Parameters
Parameter Meaning
Link Status Indicates whether link integrity is present; up means present, and down
means not present
Rx Packets Number of packets received since the last counter reset
Rx Bytes Number of bytes received since the last counter reset
Tx Packets Number of packets transmitted since the last counter reset
Tx Bytes Number of bytes transmitted since the last counter reset
Rx Total Errors Total number of receive errors
Rx FCS Number of packets with a Frame Check Sequence (FCS) error. FCS
errors indicate Frame corruption during transmission
Rx Alignment Number of packets with alignment errors; alignment errors are
received incomplete frames
Rx Runts Number of packets received that are less than 64 bytes in length
Rx Giants Number of packets received that are greater than 1518 bytes in length
for untagged interfaces and 1522 bytes for tagged interfaces
Tx Collisions (E series only) Number of transmit packets that are collisions; the port and the
attached device transmitting at the same time caused collisions
Tx Excessive (E series only) Number of consecutive collisions
Tx Deferred (E series only) Number of packets deferred
Rx Pause Frames (G series only) Number of received Ethernet 802.3x pause frames.