1.    enable


2.    config terminal


3.    controller t1 0


4.    mode atm


5.    exit


6.    interface atm 0


7.    ip address ip-address


8.    atm uni-version version-number


9.    atm ilmi-keepalive seconds


10.    pvc [name] vpi/vci


11.    protocol ip IP-address


12.    vbr-rt peak-rate average-rate burst


13.    encapsulation {aal1 | aal2 | aal5ciscoppp | aal5mux | aal5snap}


14.    exit


15.    Repeat steps 9 through 13 for each ATM PVC to be configured.

16.    dsl operating-mode {ansi-dmt | auto | itu-dmt | splitterless}


17.    Router(config-if)# no shutdown

18.    exit


19.    exit


20.    show interface atm 0

Router> enable

Router# config terminal

Router(config)# controller t1

 Router(config-ctrl)# mode atm

Router(config-ctrl)# exit

Router(config)# interface atm 0

Router(config-if)# ip address 10.2.0.1 

Router(config-if)# atm uni-version 2 

Router(config-if)# atm ilmi-keepalive 

Router(config-if)# pvc vc1 25/35 

Router(config-if-vc)# protocol ip 10.2.0.2 

Router(config-if-vc)# vbr-rt 672 672 512 

Router(config-if-vc)# encapsulation aal5snap 

Router(config-if-vc)# exit 

Router(config-if)# dsl operating-mode itu-dmt  

Router(config-if)# no shutdown 

Router(config-if)# exit 

Router(config)# exit 

Router> show interface atm 0 

This feature enables the Cisco IAD2423 to carry voice traffic (for example, telephone calls and faxes) over ATM networks using AAL2. AAL2 is the most bandwidth-efficient standards-based trunking method for transporting compressed voice, voice-band data, circuit-mode data, and frame-mode data over ATM infrastructures.

For configuration information, refer to the Cisco IOS Release 12.1(2)T feature module, Voice over ATM with AAL2 Trunking on Cisco MC3810 Series Concentrators, located on the World Wide Web at:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121newft/121t/121t2/dt_aal2v.htm

The RSVP-ATM Quality of Service (QoS) Interworking feature provides support for Controlled Load Service using RSVP over an ATM core network. This feature requires the ability to signal for establishment of switched virtual circuits (SVCs) across the ATM cloud in response to RSVP reservation messages. To meet this requirement, RSVP over ATM supports mapping of RSVP sessions to ATM SVCs.

RSVP-ATM QoS Interworking allows you to:

• Configure an interface or subinterface to dynamically create SVCs in response to RSVP reservation requests. To ensure defined QoS, these SVCs are established having QoS profiles consistent with the mapped RSVP flow specifications (flowspecs).

• Attach Distributed Weighted Random Early Detection (DWRED) group definitions to the PA-A3 ATM PA interface to support per-VC DWRED drop policy. Use of per-VC DWRED ensures that if packets must be dropped, then best-effort packets are dropped first and not those that conform to the appropriate QoS determined by the RSVP's token bucket.

• Configure the IP Precedence and type of service (ToS) values to be used for packets that conform to or exceed QoS profiles. As part of its input processing, RSVP uses the values that you specify to set the ToS and IP Precedence bits on incoming packets. If per-VC DWRED is configured, it then uses the ToS and IP Precedence bit settings on the output interface of the same router in determining which packets to drop. Also, interfaces on downstream routers use these settings in processing packets.

For configuration information, refer to, Configuring RSVP-ATM QoS Interworking, located on the World Wide Web at:

http://www.cisco.com/univercd/cc/td/doc/product/software/ios121/121cgcr/qos_c/qcprt5/qcdrsatm.htm

To display ATM-specific information about an ATM interface, use the show interface atmprivileged EXEC command.

Router# show interface atm 0
ATM0 is up, line protocol is up 
  Hardware is PQUICC Atom1 (with Alcatel ADSL Module)
  Internet address is 15.15.15.3/24
  MTU 4470 bytes, sub MTU 4470, BW 832 Kbit, DLY 20000 usec, 
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation ATM, loopback not set
  Keepalive not supported 
  Encapsulation(s):, PVC mode
  512 maximum active VCs, 8 current VCCs
  VC idle disconnect time: 300 seconds
  Last input 3d23h, output never, output hang never
  Last clearing of "show interface" counters never
  Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0
  Queueing strategy: Per VC Queueing
  30 second input rate 0 bits/sec, 0 packets/sec
  30 second output rate 0 bits/sec, 0 packets/sec
     343791 packets input, 209797720 bytes, 0 no buffer
     Received 0 broadcasts, 0 runts, 0 giants, 0 throttles
     0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
     5051487 packets output, 464110057 bytes, 0 underruns
     0 output errors, 0 collisions, 1 interface resets
     0 output buffer failures, 0 output buffers swapped out

To display DSL information about an ADSL interface, use the show dsl interface atm privileged EXEC command.

Router# show dsl interface atm 0
Alcatel 20150 chipset information
                ATU-R (DS)                      ATU-C (US)
Modem Status:    Showtime (DMTDSL_SHOWTIME)
DSL Mode:        ITU G.992.1 (G.DMT)
ITU STD NUM:     0x01                            0x1 
Vendor ID:       'ALCB'                          'ALCB'
Vendor Specific: 0x0000                          0x0000
Vendor Country:  0x00                            0x0F
Capacity Used:   85%                             98%
Noise Margin:    13.5 dB                          7.0 dB
Output Power:     9.5 dBm                        12.0 dBm
Attenuation:      1.5 dB                          3.5 dB
Defect Status:   None                            None 
Last Fail Code:  None
Selftest Result: 0x00
Subfunction:     0x15
Interrupts:      5940 (0 spurious)
PHY Access Err:  0
Activations:     1
SW Version:      3.670
FW Version:      0x1A04
                 Interleave             Fast    Interleave              Fast
Speed (kbps):             0             8128             0               864
Reed-Solomon EC:          0                0             0                 0
CRC Errors:               0                0             0                 7
Header Errors:            0                0             0                 2
Bit Errors:               0                0
BER Valid sec:            0                0
BER Invalid sec:          0                0
DMT Bits Per Bin
00: 0 0 0 0 0 0 0 7 6 7 9 A B C C C
10: C C C C C C B B B B A 9 A 9 0 0
20: 0 0 0 0 0 0 2 2 3 4 4 5 6 6 7 7
30: 7 8 8 8 9 9 9 A A A A A A B B B
40: B B B B B B B B B B B A B B B B
50: B B B B B B B B B B B B 2 B B B
60: B B B B B B B B B B B B B B B B
70: B B B B B B B B B B B B B B B B
80: B B B B B B B B B B B B B B B B
90: B B B B B B B B B B B B B B B B
A0: B B B B B B B B B B B B B B B B
B0: B B B B B B B B B B B B A B A A
C0: A A A A A A A A A A A A A A A A
D0: A A A A A A A A A A A 9 9 9 9 9
E0: 9 9 9 9 9 9 9 9 9 9 9 9 8 8 8 8
F0: 8 8 8 8 8 8 7 7 7 7 6 6 5 5 4 4

1.    Check the carrier detect LED on the card. It will be off when the ADSL carrier is not detected. If it is off, it is a physical problem probably due to a bad cable or the problem with ADSL line or WAN service.

2.    Make sure the ATM0 interface is not administratively shut down and the cable is good.

3.    If the show interface atm 0 command shows the interface as down, it means the Cisco IAD2423 sees the ADSL carrier but cannot train up with the Digital Subscriber Line Access Multiplexer (DSLAM) at the central office (CO).

     *Mar  1 00:08:21.771: DSL: SM: [DMTDSL_DO_OPEN -> DMTDSL_INIT]
     *Mar  1 00:08:23.771: DSL: SM: [DMTDSL_INIT -> DMTDSL_DLOAD_1]
     *Mar  1 00:08:23.771: DSL: Downloading asw_init_2_5_8.bin
     *Mar  1 00:08:23.771: DSL: Downloaded 2 blocks... Finished!
     *Mar  1 00:08:23.775: DSL: Sent command 0x14
     *Mar  1 00:08:26.275: DSL: Received 1 timer events during wait
     *Mar  1 00:08:27.711: DSL: Received response: 0x80
     *Mar  1 00:08:27.715: DSL: SM: [DMTDSL_DLOAD_1 -> DMTDSL_DLOAD_2]
     *Mar  1 00:08:27.715: DSL: Downloading asw_r2_5_8.bin
     *Mar  1 00:08:27.791: DSL: Downloaded 100 blocks
     *Mar  1 00:08:27.863: DSL: Downloaded 200 blocks
     *Mar  1 00:08:27.935: DSL: Downloaded 300 blocks
     *Mar  1 00:08:27.975: DSL: Downloaded 354 blocks... Finished!
     *Mar  1 00:08:27.975: DSL: Sent command 0x14
     *Mar  1 00:08:29.991: DSL: SM: [DMTDSL_DLOAD_2 -> DMTDSL_DO_OPEN]
     *Mar  1 00:08:29.991: DSL: Send ADSL_OPEN command.
     *Mar  1 00:08:29.991: DSL: Using subfunction 0x2
     *Mar  1 00:08:29.991: DSL: Sent command 0x3
     *Mar  1 00:08:32.491: DSL: 1: Modem state = 0x8
     *Mar  1 00:08:34.991: DSL: 2: Modem state = 0x8
     *Mar  1 00:08:37.491: DSL: 3: Modem state = 0x10
     *Mar  1 00:08:39.991: DSL: 4: Modem state = 0x10
     *Mar  1 00:08:42.491: DSL: 5: Modem state = 0x10
     *Mar  1 00:08:44.991: DSL: 6: Modem state = 0x10
     *Mar  1 00:08:46.003: DSL: Received response: 0x24
     *Mar  1 00:08:46.003: DSL: Showtime!
     *Mar  1 00:08:46.007: DSL: Sent command 0x11
     *Mar  1 00:08:46.011: DSL: Received response: 0x61
     *Mar  1 00:08:46.011: DSL: Read firmware revision 0x1A04
     *Mar  1 00:08:46.011: DSL: SM: [DMTDSL_DO_OPEN -> DMTDSL_SHOWTIME]

AAL --ATM Adaptation Layer. ATM adaptation layer. Service-dependent sublayer of the data link layer. The AAL accepts data from different applications and presents it to the ATM layer in the form of 48-byte ATM payload segments.

AAL2 --ATM adaptation layer 2. ATM adaptation layer 2. One of four AALs recommended by the ITU-T. AAL2 is used for connection-oriented services that support a variable bit rate, such as some isochronous video and voice traffic.

AAL5 --ATM adaptation layer 5. ATM adaptation layer 5. One of four AALs recommended by the ITU-T. AAL5 supports connection-oriented, VBR services, and is used predominantly for the transfer of classical IP over ATM and LANE traffic.

ADSL--Asymmetric Digital Subscriber Line.

ATM--Asynchronous Transfer Mode. Asynchronous Transfer Mode - International standard for cell relay in which multiple service types (such as voice, video, or data) are conveyed in fixed-length (53-byte) cells. An internationally standardized implementation of cell relay technology, ATM represents the first worldwide standard to be embraced by the computer, communications, and entertainment industry. ATM is a high-bandwidth, low-delay, connection-oriented, packet-like switching and multiplexing technique for data transmission that communicates all types of information (traditionally data, burst data, voice, video, image, and cell) over a common backbone using fixed cell lengths. ATM uses a 53-byte cell format that includes a 5-byte header and 48 bytes of payload. Because of the architecture, ATM has the capability to run from 45 Mbps using a DS3 to 2.5 Gbps using an OC-48.

broadband--Transmission system that multiplexes multiple independent signals onto one cable. In telecommunications terminology, any channel having a bandwidth greater than a voice-grade channel (4 kHz).

CBR--constant bit rate. QOS class defined by the ATM Forum for ATM networks. CBR is used for connections that depend on precise clocking to ensure undistorted delivery.

CPE--customer premises equipment. Customer Premises Equipment. Devices that a subscriber is responsible for in order to make use of telecommunications. CPE includes PCs, telephones, TVs, scanners, and much more. These devices or terminating equipment---such as terminals, telephones, and modems---are generally supplied by the telephone company, installed at customer sites, and connected to the telephone company network.

CO--Central Office - Local telephone company office to which all local loops in a given area connect and in which circuit switching of subscriber lines occurs. CO refers to the physical facility that contains the telephone switching system, transmission equipment, and other support systems that provide telephone and other telecommunications services to local telephone subscribers. There are numerous types of telephone switching systems, such as 1ESS, 4ESS, 5ESS, DMS 10/100/250/500, EAX2, or GTD5 that can be housed in a central office. The central office is not to be confused with the point of presence (POP) of the interexchange carrier, even though both perform many similar functions.

DSLAM--Digital Subscriber Line Access Multiplexer. A device that concentrates traffic in DSL implementations through a process of time-division multiplexing (TDM) at the CO or remote line shelf. This device is usually located in the CO for termination of multiple customer DSL devices.

DWRED--Distributed Weighted Random Early Detection. Random Early Detection (RED) is a congestion avoidance mechanism that takes advantage of TCP's congestion control mechanism. By randomly dropping packets prior to periods of high congestion, RED tells the packet source to decrease its transmission rate. Assuming the packet source is using TCP, it will decrease its transmission rate until all the packets reach their destination, indicating that the congestion is cleared.

Weighted RED (WRED) generally drops packets selectively based on IP precedence. Packets with a higher IP precedence are less likely to be dropped than packets with a lower precedence. Thus, higher priority traffic is delivered with a higher probability than lower priority traffic. However, you can also configure WRED to ignore IP precedence when making drop decisions so that non-weighted RED behavior is achieved.

ILMI--Interim Local Management Interface. Specification developed by the ATM Forum for incorporating network-management capabilities into the ATM UNI.

POTS--plain old telephone service. Basic analog telephone service, usually associated with residential or business subscribers.

PPP over ATM--Point-to-Point Protocol. A successor to SLIP, PPP provides router-to-router and host-to-network connections over synchronous and asynchronous circuits.

PVC--permanent virtual circuit. Virtual circuit that is permanently established. PVCs save bandwidth associated with circuit establishment and tear down in situations where certain virtual circuits must exist all the time.

QoS--quality of service. Measure of performance for a transmission system that reflects its transmission quality and service availability.

RSVP--Resource Reservation Protocol. The Resource Reservation Protocol is a network-control protocol that enables Internet applications to obtain special qualities of service (QoSs) for their data flows.

SVC--switched virtual circuit. Virtual circuit that is dynamically established on demand and is torn down when transmission is complete. SVCs are used in situations where data transmission is sporadic. Called a switched virtual connection in ATM terminology.

ToS--type of service. See COS.

UBR--unspecified bit rate. QOS class defined by the ATM Forum for ATM networks. UBR allows any amount of data up to a specified maximum to be sent across the network, but there are no guarantees in terms of cell loss rate and delay.

UNI--User-Network Interface. ATM Forum specification that defines an interoperability standard for the interface between ATM-based products (a router or an ATM switch) located in a private network and the ATM switches located within the public carrier network.

VBR--variable bit rate. QOS class defined by the ATM Forum for ATM networks. VBR is subdivided into a real time (RT) class and non-real time (NRT) class.

VC--virtual circuit. Logical circuit created to ensure reliable communication between two network devices. A virtual circuit is defined by a virtual path identifier/virtual channel identifier (VPI/VCI) pair, and can be either a PVC or a SVC. Virtual circuits are used in Frame Relay and X.25. In ATM, a virtual circuit is called a virtual channel.