Cisco ONS 15454 SDH Specifications Page 392

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Cisco ONS 15454 SDH Installation and Operations Guide, R3.3
May 2002
Chapter 9 Ethernet Operation
G1000-4 Performance and Maintenance Screens
Note You can apply both the Baseline and the Clear functions to a single port or all ports on the card. To apply
Baseline or Clear to a single port, click the port column to highlight the port and click the Baseline or
Clear button.
Note The HDLC errors counter should not be used to count the number of frames dropped due to HDLC errors
as each frame can get fragmented into several smaller frames during HDLC error conditions and
spurious HDLC frames can also generate. If these counters are incrementing at a time when there should
be no SDH path problems that may indicate a problem with the quality of the SDH path. For example,
an SDH protection switch causes a set of HLDC errors to generate. The actual values of these counters
are less relevant than the fact they are changing.
Table 9-10 Ethernet Parameters
Parameter Meaning
Link Status Indicates whether the Ethernet link is receiving a valid Ethernet signal
(carrier) from the attached Ethernet device; 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 The total number of frames received that are less than 64 bytes in
length and have a CRC error
Rx Jabbers (G series only) The total number of frames received that are greater than 1548 bytes
in length and have a CRC error
Rx Giants Number of packets received that are greater than 1548 bytes in length
Rx Pause Frames (G series
only)
Number of received Ethernet 802.3x pause frames
Tx Pause Frames (G series
only)
Number of transmitted 802.3x pause frames
Rx Pkts Dropped Internal
Congestion (G series only)
Number of received packets dropped due to overflow in G1000-4
frame buffer
Tx Pkts Dropped Internal
Congestion (G series only)
Number of transmit queue drops due to drops in the G1000-4 frame
buffer
HDLC errors (G series only) HDLC errors received from SONET/SDH (see note)
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