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Page 41 / 300 Scroll up to view Page 36 - 40
Chapter 4 Device Information
P-663HN-51 User’s Guide
41
4.4
WAN Statistics
Click
Device Info > Statistics > WAN
to open the following screen. Each row in
the table displays statistics about a WAN connection.
Figure 13
Device Info > Statistics > WAN
The following table describes the labels in this screen.
Table 6
Device Info > Statistics > WAN
LABEL
DESCRIPTION
Service
If the WAN connection is using bridging, the name of the bridge displays
here.
VPI/VCI
This field displays the WAN connection’s Virtual Path Identifier, and Virtual
Channel Identifier.
Protocol
This is the type of network protocol the WAN interface is using for IP over
Ethernet.
Interface
This field displays the name of the WAN connection.
Received
These statistics are for traffic the ZyXEL Device has received on the WAN
connection.
Transmitted
These statistics are for traffic the ZyXEL Device has sent through the WAN
connection.
Bytes
This field displays the number of bytes received or sent.
Pkts
This field displays the number of packets received on or sent through the
WAN connection.
Errs
This field displays the number of error packets received on or sent through
the WAN connection.
Drops
This field displays the number of incoming or outgoing packets dropped.
Reset
Statistics
Click this button to have the ZyXEL Device clear the current WAN statistics
and start collecting them again.
Page 42 / 300
Chapter 4 Device Information
P-663HN-51 User’s Guide
42
4.5
ATM Statistics
Click
Device Info > Statistics > ATM
to open the following screen. This screen
shows low-level ATM protocol statistics.
Figure 14
Device Info > Statistics > ATM
The following table describes the labels in this screen.
Table 7
Device Info > Statistics > ATM
LABEL
DESCRIPTION
ATM
Interface
Statistics
These are statistics for the ATM interface.
In Octets
How many octets the interface received.
Out Octets
How many octets the interface transmitted.
In Errors
How many cells the ZyXEL Device dropped because of uncorrectable HEC
errors.
In Unknown
How many received cells the ZyXEL Device discarded during cell header
validation. This includes cells with invalid cell header patterns or
unrecognized VPI/VCI values. If the ZyXEL Device is set to discard cells
with undefined PTI values, they are also included in this count.
In Hec Errors
How many cells the ZyXEL Device received with HEC errors in the ATM cell
headers.
In Invalid Vpi
Vci Errors
How many cells the ZyXEL Device received with an unregistered VCC
(Virtual Channel Connection) address.
In Port Not
Enable
Errors
How many cells the ZyXEL Device received on disabled ports.
In PTI Errors
How many cells the ZyXEL Device received with an ATM header that had a
Payload Type Indicator (PTI).
In Idle Cells
How many idle cells the ZyXEL Device received.
Page 43 / 300
Chapter 4 Device Information
P-663HN-51 User’s Guide
43
In Circuit
Type Errors
How many idle cells the ZyXEL Device received with illegal circuit types.
In OAM RM
CRC Errors
How many Operational, Administration and Maintenance Function 5 (OAM)
and RM (Rate Management) cells the ZyXEL Device received with a Cyclic
Redundancy Check error.
In GFC
Errors
How many cells the ZyXEL Device received with non-zero GFCs.
AAL5
Interface
Statistics
These are statistics for the AAL5 interface.
In Octets
How many AAL5/AAL0 CPCS PDU octets the ZyXEL Device received.
Out Octets
How many AAL5/AAL0 CPCS PDU octets the ZyXEL Device transmitted.
In Ucast Pkts
How many received AAL5/AAL0 CPCS PDUs the ZyXEL Device passed to
higher layers.
Out Ucast
Pkts
How many AAL5/AAL0 CPCS PDUs the ZyXEL Device received for
transmission from higher layers.
In Errors
How many AAL5/AAL0 CPCS PDUs the ZyXEL Device received that
contained errors. Including CRC-32 errors, SAR timeouts, and oversised
SDUs.
Out Errors
How many AAL5/AAL0 CPCS PDUs the ZyXEL Device could not transmit
due to errors.
In Discards
How many AAL5/AAL0 CPCS PDUs the ZyXEL Device discarded due to
input buffer overflows.
Out Discards
How many non-errored AAL5/AAL0 CPCS PDUs the ZyXEL Device
discarded. (For example, the ZyXEL Device might do this to free up buffer
space.)
AAL5 VCC
Statistics
These are statistics for the ATM VCC (Virtual Channel Connection)
interface.
VPI/VCI
A VCC (Virtual Channel Connection) is a VPI and VCI combination. Each
row in this table represents a VCC. This field displays the Virtual Path
Identifier, and Virtual Channel Identifier of each VCC.
CRC Errors
How many PDUs the ZyXEL Device received on the VCC with CRC-32
errors.
SAR
Timeouts
How many partially-reassembled PDUs the ZyXEL Device discarded
because they were not fully reassembled during the allotted time period.
This value is zero if the re-assembly timer is not supported.
Oversized
SDUs
How many PDUs with corresponding SDUs that were too large (so the
ZyXEL Device discarded them).
Short Packet
Errors
How many PDUs that had a length shorter than the size of the AAL5 trailer
(so the ZyXEL Device discarded them).
Length
Errors
How many PDUs the ZyXEL Device discarded because the length in the
AAL5 trailer did not match the PDU length.
Reset
Statisitcs
Click this button to have the ZyXEL Device clear the current ATM statistics
and start collecting them again.
Table 7
Device Info > Statistics > ATM (continued)
LABEL
DESCRIPTION
Page 44 / 300
Chapter 4 Device Information
P-663HN-51 User’s Guide
44
4.6
ADSL Statistics
Click
Device Info > Statistics > ADSL
to open the following screen. This screen
displays statistics about the ZyXEL Device’s ADSL connection.
Figure 15
Device Info > Statistics > ADSL
The following table describes the labels in this screen.
Table 8
Device Info > Statistics > ADSL
LABEL
DESCRIPTION
Mode
This is the ADSL mode that the ADSL link is using.
Type
This shows whether it is an “interleaved” (uses interleaving to aid in error
correction) or “fast” (no interleaving) ADSL link.
Line Coding
This shows whether the ADSL link is using Trellis coding or Reed-Solomon
error correction. Trellis coding helps to reduce the noise in ADSL
transmissions. Trellis may reduce throughput but it makes the connection
more stable. “RS” coding stands for Reed-Solomon error correction.
Status
This shows the ADSL link’s connection status.
Page 45 / 300
Chapter 4 Device Information
P-663HN-51 User’s Guide
45
Link Power
State
This is the ADSL connection’s current power management mode.
SNR Margin
(dB)
This is the upstream and downstream Signal-to-Noise Ratio Margin (in
dB). A DMT
sub-carrier’s SNR is the ratio between the received signal power and the
received
noise power. The signal-to-noise ratio margin is the maximum that the
received noise
power could increase with the ZyXEL Device still being able to meet its
transmission targets.
Attenuation
(dB)
This is the downstream and upstream Line Attenuation (in dB).
Output Power
(dBm)
This field displays the amount of power being used to transmit to the
other end of the ADSL link. Output power varies with the line length and
quality. The longer the line is or the more interference there is on the
line, the more power is needed.
Attainable
Rate (Kbps)
These are the downstream and upstream highest theoretically possible
transfer rates (in Kbps).
Aggregate
Rate (Kbps)
These are the combined downstream and upstream rates (in Kbps) of the
two DSL ports.
DSL1 Rate
(Kbps)
These are the downstream and upstream rates (in Kbps) at which the
DSL1 port has been receiving and sending data.
DSL2 Rate
(Kbps)
These are the downstream and upstream rates (in Kbps) at which the
DSL2 port has been receiving and sending data.
Super Frames
These are the downstream and upstream numbers of downstream and
upstream super frames.
Super Frame
Errors
These are the downstream and upstream numbers of errored super
frames sent and received.
RS Words
These are the downstream and upstream numbers of Reed-Solomon
error correction words.
RS
Correctable
Errors
These are the downstream and upstream numbers of Reed-Solomon
errors.
RS
Uncorrectable
Errors
The number of downstream and upstream uncorrectable Reed-Solomon
errors.
HEC Errors
These are the downstream and upstream numbers of Header Error
Control errors.
OCD Errors
These are the downstream and upstream numbers of Out of Cell
Delineation errors.
LCD Errors
The number of 1-second intervals since reset where loss of cell
delineation occurred.
Total Cells
The total numbers of downstream and upstream ATM cells.
Data Cells
The total numbers of downstream and upstream data cells.
Table 8
Device Info > Statistics > ADSL (continued)
LABEL
DESCRIPTION

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