4. Monitoring the Hotwire DSL System
8000-A2-GB26-50 April 2001 4-9
SAR Stats (SAR Statistics)
(continued)
B-B-B
Disconnects – Disconnected because:
APC Overrun – The ATM Pace Controller (APC) has more cell traffic to send than
will fit in a timeslot.
APC Restart – For future use.
INT Overrun – Too many events in the SAR.
SYNC Error – Utopia hardware sync error.
Link Ups – Number of times the cell bus interface to the SCM has come up.
Link Downs – Number of times the cell bus interface to the SCM has gone down.
Clock Loss – Clock Loss event on the ATM backplane cell bus interface.
Sync Loss – Receiving invalid-sized cells and cannot synchronize.
EtherHDLC Stats (EtherHDLC Statistics) B-B-C
Displays statistics in real time on the HDLC link later protocol between the Access Node
and each Service Node (for example, dsl001, dsl002, etc., ports.) (See field definitions
from previous screen.)
The counters increment in real time and you may press Ctrl-r at any time to reset the
counters.
Port Name – Port name (for example, dsl1:1 through dsl12:1 for 12-port cards).
Initialized EtherHDLC Ports – For example, dsl1:1 through dsl12:1 for 12-port cards.
Bytes Received – Number of bytes received.
Bytes Transmitted – Number of bytes transmitted.
Packets Received – Number of packets received.
Multicasts
Broadcasts
Flooded
Filtered
VNID Error
Packets transmitted – Number of packets transmitted.
Multicast – Single packets copied to a specific subset of network addresses.
Broadcast – Messages sent to all network destinations.
Flooded – Information received, then sent out to each of the interfaces.
Discarded – Packets discarded.
MTU Exceed – Packets received above the Maximum Transmission Unit (MTU)
setting.
Errors – Number of other receive errors. (If a high number of errors have been received,
the card may have to be reset.)
Overruns – No buffer space.
Bad CRC – Cyclic Redundancy Check.
Framing – Receiver improperly interprets set of bits within frame.
Jumbo-Gram – Ethernet packet too long.
Underruns – Packets not available to send from Ethernet interface.
Buffer – Packets dropped because transmission buffer is full.
Table 4-2. Physical Layer Options (4 of 8)