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Verifying DSL Interface Configuration
To verify ATM-over-ADSL or ATM-over-SHDSL, perform these tasks:
- Verifying ADSL Interface Properties
- Displaying a PPPoA Configuration for an ATM-over-ADSL Interface
- Verifying an ATM-over-SHDSL Configuration
Verifying ADSL Interface Properties
Purpose
Verify that the interface properties are correct.
Action
From the CLI, enter the show interfaces interface-name extensive command.
Sample Output
user@host> show interfaces at-1/0/0
extensive Physical interface: at-1/0/0, Enabled, Physical link is Up
Interface index: 141, SNMP ifIndex: 49, Generation: 142
Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, ADSL mode,
Speed: ADSL, Loopback: None
Device flags : Present Running
Link flags : None
CoS queues : 8 supported, 8 maximum usable queues
Hold-times : Up 0 ms, Down 0 ms
Current address: 00:05:85:c3:17:f4
Last flapped : 2008-06-26 23:11:09 PDT (01:41:30 ago)
Statistics last cleared: Never
Traffic statistics:
Input bytes : 0 0 bps
Output bytes : 0 0 bps
Input packets: 0 0 pps
Output packets: 0 0 pps
Input errors:
Errors: 0, Drops: 0, Invalid VCs: 0, Framing errors: 0,Policed discards: 0, L3 incompletes: 0, L2 channelerrors: 0, L2 mismatch timeouts: 0,
Resource errors: 0
Output errors:
Carrier transitions: 3, Errors: 0, Drops: 0, Aged packets: 0, MTU errors: 0, Resource errors: 0
ADSL alarms : None
ADSL defects : None
ADSL media: Seconds Count State
LOF 1 1 OK
LOS 1 1 OK
LOM 0 0 OK
LOP 0 0 OK
LOCDI 0 0 OK
LOCDNI 0 0 OK
ADSL status:
Modem status : Showtime (Adsl2plus)
DSL mode : Auto Annex A
Last fail code: None
Subfunction : 0x00
Seconds in showtime : 6093
ADSL Chipset Information: ATU-R ATU-C
Vendor Country : 0x0f 0xb5
Vendor ID : STMI IFTN
Vendor Specific: 0x0000 0x70de
ADSL Statistics: ATU-R ATU-C
Attenuation (dB) : 0.0 0.0
Capacity used(%) : 100 92
Noise margin(dB) : 7.5 9.0
Output power (dBm) : 10.0 12.5
Interleave Fast Interleave Fast
Bit rate (kbps) : 0 24465 0 1016
CRC : 0 0 0 0
FEC : 0 0 0 0
HEC : 0 0 0 0
Received cells : 0 49
Transmitted cells : 0 0
ATM status:
HCS state: Hunt
LOC : OK
ATM Statistics:
Uncorrectable HCS errors: 0, Correctable HCS errors: 0,Tx cell FIFO overruns: 0,Rx cell FIFO overruns: 0,Rx cell FIFO underruns: 0,
Input cell count: 49, Output cell count: 0,Output idle cell count: 0,Output VC queue drops: 0Input no buffers: 0, Input length errors: 0,
Input timeouts: 0, Input invalid VCs: 0, Input bad CRCs: 0, Input OAM cell no buffers: 0
Packet Forwarding Engine configuration:
Destination slot: 1
Direction : Output
CoS transmit queue Bandwidth Buffer Priority Limit
% bps % usec
0 best-effort 95 7600000 95 0 low none
3 network-control 5 400000 5 0 low none
But for ADSL MiniPim TI chipset does not send ADSL Chipset
Information. Also Adsl minipim does not send any alarms. So we can't
show alarm stats for minipim. So following information will not be
displayed in Minipim case.
ADSL alarms : None
ADSL defects : None
ADSL media: Seconds Count State
LOF 1 1 OK
LOS 1 1 OK
LOM 0 0 OK
LOP 0 0 OK
LOCDI 0 0 OK
LOCDNI 0 0 OK
ADSL Chipset Information: ATU-R ATU-C
Vendor Country : 0x0f 0xb5
Vendor ID : STMI IFTN
Vendor Specific: 0x0000 0x70de
Meaning
The output shows a summary of interface information. Verify the following information:
- The physical interface is Enabled. If the interface
is shown as Disabled, do either of the following:
- In the CLI configuration editor, delete the disable statement at the [edit interfaces interface-name] level of the configuration hierarchy.
- In the J-Web configuration editor, clear the Disable check box on the Interfaces>interface-name page.
- The physical link is Up. A link state of Down indicates a problem with the interface module, interface port, or physical connection (link-layer errors).
- The Last Flapped time is an expected value. The Last Flapped time indicates the last time the physical interface became unavailable and then available again. Unexpected flapping indicates likely link-layer errors.
- The traffic statistics reflect expected input and output rates. Verify that the number of inbound and outbound bytes and packets matches expected throughput for the physical interface. To clear the statistics and see only new changes, use the clear interfaces statistics interface-name command.
- No ADSL alarms and defects appear that can render the
interface unable to pass packets. When a defect persists for a certain
amount of time, it is promoted to an alarm. The following are ADSL-specific
alarms:
- LOCDI–Loss of cell delineation for interleaved channel
- LOCDNI—Loss of cell delineation for non-interleaved channel
- LOF—Loss of frame
- LOM—Loss of multiframe
- LOP—Loss of power
- LOS—Loss of signal
- FAR_LOF—Loss of frame in ADSL transceiver unit-central office (ATU-C)
- FAR_LOS—Loss of signal in ATU-C
- FAR_LOCDI—Loss of cell delineation for interleaved channel in ATU-C
- FAR_LOCDNI—Loss of cell delineation for non-interleaved channel in ATU-C
Examine the operational statistics for an ADSL interface. Statistics in the ATU-R (ADSL transceiver unit–remote) column are for the near end. Statistics in the ATU-C (ADSL transceiver unit–central office) column are for the far end.
- Attenuation (dB)—Reduction in signal strength measured in decibels.
- Capacity used (%)—Amount of ADSL usage in %.
- Noise Margin (dB)—Maximum extraneous signal allowed without causing the output to deviate from an acceptable level.
- Output Power (dBm)—Amount of power used by the ADSL interface.
- Bit Rate (kbps)—Data transfer speed on the ADSL interface.
Related Topics
For a complete description of show interfaces extensive output, see the Junos Interfaces Command Reference.
Displaying a PPPoA Configuration for an ATM-over-ADSL Interface
Purpose
Verify the PPPoA configuration for an ATM-over-ADSL interface.
Action
Enter the show interfaces interface-name and the show access commands.
[edit]user@host# show interfaces at-1/0/0at-1/0/0 {encapsulation atm-pvc;atm-options {vpi 0;}dsl-options {operating-mode auto;}unit 0 {encapsulation atm-ppp-llc;vci 0.100;ppp-options {chap {access-profile A-ppp-client;local-name A-at-1/0/0.0;passive;}}family inet {negotiate address;}}}user@host# show accessprofile A-ppp-client {client A-ppp-server chap-secret "$9$G4ikPu0ISyKP5clKv7Nik.PT3";
## SECRET-DATA }
Meaning
Verify that the output shows the intended configuration of PPPoA.
Verifying an ATM-over-SHDSL Configuration
Purpose
Verify that the interface properties are correct.
Action
From the CLI, enter the show interfaces interface-name extensive command.
Sample Output
user@host> show interfaces at-6/0/0
extensivePhysical interface: at-6/0/0, Enabled, Physical link is Up
Interface index: 141, SNMP ifIndex: 23, Generation: 48
Link-level type: ATM-PVC, MTU: 4482, Clocking: Internal, ADSL mode, Speed: ADSL,
Loopback: None
Device flags : Present Running
Link flags : None
CoS queues : 8 supported
Hold-times : Up 0 ms, Down 0 ms
Current address: 00:05:85:c7:44:3c
Last flapped : 2005-05-16 05:54:41 PDT (00:41:42 ago)
Statistics last cleared: Never
Traffic statistics:
Input bytes : 4520 0 bps
Output bytes : 39250 0 bps
Input packets: 71 0 pps
Output packets: 1309 0 pps
Input errors:
Errors: 0, Drops: 0, Invalid VCs: 0, Framing errors: 0, Policed discards: 0,
L3 incompletes: 0, L2 channel errors: 1, L2 mismatch timeouts: 0, Resource errors: 0
Output errors:
Carrier transitions: 3, Errors: 0, Drops: 0, Aged packets: 0, MTU errors: 0,
Resource errors: 0
Queue counters: Queued packets Transmitted packets Dropped packets
0 best-effort 4 4 0
1 expedited-fo 0 0 0
2 assured-forw 0 0 0
3 network-cont 2340 2340 0
SHDSL alarms : None
SHDSL defects : None
SHDSL media: Seconds Count State
LOSD 239206 2 OK
LOSW 239208 1 OK
ES 3 1 OK
SES 0 0 OK
UAS 3 1 OK
SHDSL status:
Line termination :STU-R
Annex :Annex B
Line Mode :2–wire
Modem Status :Data
Last fail code :0
Framer mode :ATM
Dying Gasp :Enabled
Chipset version :1
Firmware version :R3.0
SHDSL Statistics:
Loop Attenuation (dB) :0.600
Transmit power (dB) :8.5
Receiver gain (dB) :21.420
SNR sampling (dB) :39.3690
Bit rate (kbps) :2304
Bit error rate :0
CRC errors :0
SEGA errors :1
LOSW errors :0
Received cells :1155429
Transmitted cells :1891375
HEC errors :0
Cell drop :0 Meaning
The output shows a summary of interface information. Verify the following information:
- The physical interface is Enabled. If the interface
is shown as Disabled, do either of the following:
- In the CLI configuration editor, delete the disable statement at the [edit interfaces interface-name] level of the configuration hierarchy.
- In the J-Web configuration editor, clear the Disable check box on the Interfaces>interface-name page.
- The physical link is Up. A link state of Down indicates a problem with the interface module, interface port, or physical connection (link-layer errors).
- The Last Flapped time is an expected value. The Last Flapped time indicates the last time the physical interface became unavailable and then available again. Unexpected flapping indicates likely link-layer errors.
- The traffic statistics reflect expected input and output rates. Verify that the number of inbound and outbound bytes and packets matches expected throughput for the physical interface. To clear the statistics and see only new changes, use the clear interfaces statistics interface-name command.
- No SHDSL alarms and defects appear that can render the
interface unable to pass packets. When a defect persists for a certain
amount of time, it is promoted to an alarm.
- LOS—Loss of signal. No signal was detected on the line.
- LOSW—Loss of sync word. A message ID was sent.
- Power status—A power failure has occurred.
- LOSD—Loss of signal was detected at the remote application interface.
- ES—Errored seconds. One or more cyclic redundancy check (CRC) anomalies were detected.
- SES—Severely errored seconds. At least 50 CRC anomalies were detected.
- UAS—Unavailable seconds. An interval has occurred during which one or more LOSW defects were detected.
Examine the SHDSL interface status:
- Line termination—SHDSL transceiver unit–remote (STU–R). (Only customer premises equipment is supported.)
- Annex—Either Annex A or Annex B. Annex A is supported in North America, and Annex B is supported in Europe.
- Line Mode—SHDSL mode configured on the G.SHDSL interface pair, either 2-wire or 4-wire.
- Modem Status—Data. Sending or receiving data.
- Last fail code—Code for the last interface failure.
- Framer mode—Framer mode of the underlying interface: ATM.
- Dying Gasp—Ability of a J Series device that has lost power to send a message informing the attached DSL access multiplexer (DSLAM) that it is about to go offline.
- Chipset version—Version number of the chipset on the interface
- Firmware version—Version number of the firmware on the interface.
Examine the operational statistics for a SHDSL interface.
- Loop Attenuation (dB)—Reduction in signal strength measured in decibels.
- Transmit power (dB)—Amount of SHDSL usage in %.
- Receiver gain (dB)—Maximum extraneous signal allowed without causing the output to deviate from an acceptable level.
- SNR sampling (dB)—Signal-to-noise ratio at a receiver point, in decibels.
- Bit Rate (kbps)—Data transfer speed on the SHDSL interface.
- CRC errors—Number of cyclic redundancy check errors.
- SEGA errors—Number of segment anomaly errors. A regenerator operating on a segment received corrupted data.
- LOSW errors—Number of loss of signal defect errors. Three or more consecutively received frames contained one or more errors in the framing bits.
- Received cells—Number of cells received through the interface.
- Transmitted cells—Number of cells sent through the interface.
- HEC errors—Number of header error checksum errors.
- Cell drop—Number of dropped cells on the interface.
Related Topics
For a complete description of show interfaces extensive output, see the Junos Interfaces Command Reference.
