Configuring an ADSL WAN Interface Card on Cisco 1700 Series Routers This document describes asymmetric digital subscriber line (ADSL) one-port wide area network (WAN) interface cards (WICs). These cards provide ADSL high-speed digital data transfer between a single customer premises equipment (CPE) subscriber and a central office.
Feature Overview Feature Overview Figure 1 shows a data network with the card. Figure 2 shows a voice network with the card. Figure 1 ADSL WIC in a Cisco 1700 Series Router Data Network ADSL WIC AAL5 41852 ADSL DSLAM Figure 2 ADSL WIC in a Cisco 1700 Series Router Voice Network ADSL WIC AAL5 ADSL DSLAM 41851 Analog phones On Cisco 1700 series routers, an ADSL WIC fits into a Cisco 1700 series router chassis.
Related Documents SEE MANUAL BEFORE INSTALLATION ADSL Figure 5 WIC 1ADSL DG CD LP OK 88862 ADSL over POTS with Dying Gasp WIC ADSL over ISDN with Dying Gasp WIC SEE MANUAL BEFORE INSTALLATION ADSL CD LP OK WIC 1ADSL IDG 88863 Figure 4 Memory Requirements The memory requirements for running the full-featured Cisco 1700 router encryption images with the ADSL WICs are as follows: • 16 MB of Flash memory • 64 MB of dynamic RAM (DRAM) Related Documents The following documents provide additiona
Safety Warnings Safety Warnings Safety warnings appear throughout this publication in procedures that can harm you if they are performed incorrectly. A warning symbol precedes each warning statement. Warning Conventions Warning This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents.
Safety Warnings The following warning applies when this product is used in Australia. Warning This equipment must be installed and maintained by service personnel as defined by AS/NZS 3260. Incorrectly connecting this equipment to a general purpose outlet could be hazardous. The telecommunications lines must be disconnected 1) before unplugging the main power connector or 2) while the housing is open, or both.
Connecting an ADSL WIC to the Network Warning Do not touch the power supply when the power cord is connected. For systems with a power switch, line voltages are present within the power supply even when the power switch is OFF and the power cord is connected. For systems without a power switch, line voltages are present within the power supply when the power cord is connected.
Configuring the ADSL Interface Note If you are connecting a Cisco 1700 series router with an ADSL WIC to an RJ-11 wall jack that has the ADSL pair wired for pins 2 and 5, you must use the lavender crossover cable with the blue stripe. The crossover cable is orderable as a spare. The following steps tell how to connect the card, using the standard lavender RJ-11 cable; the steps also apply to the lavender crossover cable with the blue stripe. Step 1 Confirm that router power is still turned off.
Configuring the ADSL Interface Timesaver Obtain this information from your system administrator or network plan before you begin router configuration. You can configure the new interface and other router parameters by using any of the following methods: • Configuration Mode (manual configuration)—recommended if you are familiar with IOS commands. Enter the commands at the prompt. • AutoInstall (automatic installation)—recommended if another router running IOS software is installed on the network.
Configuring the ADSL Interface Before you begin, disconnect all WAN cables from the router to keep it from running the AutoInstall process. The router tries to run AutoInstall whenever you power it on if there is a WAN connection on both ends and the router does not have a valid configuration file stored in NVRAM (for instance, when you add a new interface).
Configuring the ADSL Interface Router (config-if) dsl operating-mode mode Caution This command is for testing or lab environments only. Using a mode other auto for the DSL operating mode can lead to unpredictable behavior on the ADSL line. Step 8 Configure routing protocols on the interface. (You must have previously enabled these protocols as part of global configuration.
Configuring the ADSL Interface This functionality is coordinated by your system administrator at the TCP/IP host site. You should not try to use AutoInstall unless the required files are installed on the TCP/IP host. Follow this procedure to prepare your router for the AutoInstall process: Step 1 Connect the router to the WAN. Step 2 Turn on power to the router. The router loads the operating system image from Flash memory.
Configuring the ADSL Interface Note You can enter the System Configuration dialog at any time from the enable prompt (Router#) by entering the setup command. Step 3 When the System Configuration dialog asks whether you want to view the current interface summary, press Return or enter yes. Step 4 If you have not configured the router before, or if you want to change the configuration, you should now configure global parameters, passwords, network management, and routing protocols.
Using POTS Splitters and Microfilters no parser cache no service single-slot-reload-enable service timestamps debug uptime service timestamps log uptime no service password-encryption ! hostname 1751-uut1 ! interface ATM0/0 mtu 4000 ip address 1.0.0.1 255.0.0.0 atm vc-per-vp 256 no atm ilmi-keepalive pvc 0/16 ilmi pvc 88/88 encapsulation aal5snap ! bundle-enable dsl operating-mode auto bridge-group 1 ! interface FastEthernet0/0 ip address 6.0.0.1 255.0.0.
Using POTS Splitters and Microfilters Figure 7 is an example of a type of POTS splitter that is installed at the customer premises by the customer. Other types of POTS splitters are installed by the telephone company on an exterior wall of the customer premises. Figure 7 POTS Splitters To wall jack VOICE 41199 DATA To phone To Cisco router Microfilters Microfilters are installed on telephones to improve voice-call quality when voice and data equipment are using the same telephone line (twisted pair).
Using POTS Splitters and Microfilters Telephone Company-Installed Splitter This scenario is described below and illustrated in Figure 9. • The telephone company has provisioned a single copper pair to be used by both the telephone (POTS) service and the router with an ADSL card, so a POTS splitter must be installed. • The splitter is installed by the telephone company on the customer premises. This type of splitter is also referred to as a network interface device (NID).
Using POTS Splitters and Microfilters Figure 10 Customer-Installed Splitter To telco Actual wall of building Required microfilter Splitter Cisco router Optional telephones, if supported by your telco 39275 Optional microfilters Router and Telephone Using Separate Telephone Lines This scenario is described below and illustrated in Figure 11.
Configuring Quality of Service Parameters Configuring Quality of Service Parameters This section discusses quality of service (QoS) parameters that can be configured for the 1700 series platforms when using the ADSL WIC.
Configuring Quality of Service Parameters int atm0/0.1 point-to-point pvc 0/33 vbr-rt 320 320 30 tx-ring-limit 3 protocol ppp Virtual-Template1 ! interface Virtual-Template1 bandwidth 320 ip unnumbered Loopback1 ip mroute-cache service-policy output 1751_ADSL ppp multilink ppp multilink fragment-delay 4 ppp multilink interleave ! access-list 100 permit udp any any precedence critical ! dial-peer voice 201 voip destination-pattern 3640200 session target ipv4:10.0.0.
Configuring Quality of Service Parameters ! interface ATM0/0 dsl operating-mode auto no ip address no atm ilmi-keepalive ! interface ATM0/0.1 point-to-point description COLLEGAMENTO mtu 576 ip address 1.0.0.1 255.0.0.0 pvc 99/99 protocol ip 2.0.0.2 broadcast vbr-nrt 142 142 1 tx-ring-limit 3 oam-pvc 0 oam retry 5 5 1 encapsulation aal5snap service-policy out ADSL-out ! dial-peer voice 201 voip destination-pattern 3640200 session target ipv4:14.0.0.
Configuring Quality of Service Parameters Multilink PPP over ATM with Link Fragmentation and Interleaving This feature allows multilink PPP (MLPPP) encapsulation over a single slow link to fragment and interleave packets to a small enough size that the delay requirements of delay-sensitive traffic will be met. Fragment size at the MLPPP bundle can be configured by using the virtual-template interface bandwidth command and the ppp multilink fragment-delay command.
Configuring Quality of Service Parameters interface Virtual-Template1 bandwidth 320 ip unnumbered Loopback1 ip mroute-cache service-policy output 1751_ADSL ppp multilink ppp multilink fragment-delay 4 ppp multilink interleave ! access-list 100 permit udp any any precedence critical Weighted Random Early Detection You can set a queuing technique on a device’s interface to manage how packets are handled when an interface starts to become congested.
Configuring Quality of Service Parameters vbr-rt 320 320 30 no ilmi manage oam-pvc 40 oam retry 3 5 1 encapsulation aal5snap ! end ATM per-VC Queuing and VC Bundling Parameters can be applied to individual VCs either by using VC classes or by directly applying them to the bundle members. Parameters applied to an individual VC supersede bundle-level parameters. Parameters applied directly to a VC take precedence over the same parameters applied within a class to the VC at the bundle-VC configuration level.
Configuring Quality of Service Parameters ! bundle-enable dsl operating-mode auto ! interface ATM0/0.1 point-to-point description COLLEGAMENTO ip address 2.0.0.2 255.255.0.0 bundle MMA class-bundle atm-bundle pvc-bundle vip 0/33 class-vc vip pvc-bundle high 0/34 class-vc high pvc-bundle normal 0/35 class-vc normal ATM Cell Loss Priority Bit Marking When congestion occurs in an ATM network, ATM cells are discarded.
Configuring Quality of Service Parameters The basicpremise of cRTP is that although several fields in the IP, UDP, and RTP header change from packet to packet, the differences in these fields from packet to packet are constant. The compression scheme in cRTP encodes the header to reduce the size of the information to be transmitted. With cRTP, a 40-byte IP, UDP, and RTP header of a VoIP packet can be compressed to 2 to 4 bytes per packet, yielding approximately 11.2 kbps of bandwidth for a G.
Configuring Quality of Service Parameters bandwidth 320 ip unnumbered Loopback1 ip tcp header-compression iphc-format service-policy output ADSL-2 ip rtp header-compression iphc-format Tunable Transmission Ring The transmission (tx) ring is the first-in, first-out (FIFO) buffer used to hold frames before transmission at the DSL driver level. The tx ring defines the maximum number of packets that can wait for transmission at Layer 2.
Configuring Quality of Service Parameters vbr-rt 320 320 30 tx-ring-limit 3 protocol ppp Virtual-Template1 ! interface Virtual-Template1 bandwidth 320 ip unnumbered Loopback1 ip mroute-cache service-policy output 1751_ADSL ppp multilink ppp multilink fragment-delay 4 ppp multilink interleave ! access-list 100 permit udp any any precedence critical ! dial-peer voice 201 voip destination-pattern 3640200 session target ipv4:10.0.0.
Configuring Quality of Service Parameters Configuration Example The following example shows a Cisco 1760 router configured with MLP Bundling: ! interface Multilink1 ip address 10.0.0.9 255.255.0.
Configuring the SCC Clock Rate Configuring the SCC Clock Rate Communciation between a DSL WIC and the host in a router takes place through a device called a serial communications controller (SCC). Whenever the host wants to transmit data or send any control traffic to the DSL WIC, it uses an SCC. Similarly, when a DSL WIC wants to forward incoming data from the line to the host, it also uses an SCC. Each DSL WIC installed in a router uses two SCCs.
Configuring FRF.5 and FRF.
Obtaining Documentation no ip address no atm ilmi-keepalive pvc 0/33 encapsulation aal5mux frame-relay ! dsl operating-mode auto ! connect frf5 serial0 100 atm1 0/33 network-interworking FRF.8 The following example shows how to create an FRF.8 connection, using the service-interworking keyword in the connect command.
Obtaining Technical Assistance Ordering Documentation You can order Cisco documentation in these ways: • Registered Cisco.com users (Cisco direct customers) can order Cisco product documentation from the Networking Products MarketPlace: http://www.cisco.com/cgi-bin/order/order_root.pl • Registered Cisco.com users can order the Documentation CD-ROM through the online Subscription Store: http://www.cisco.com/go/subscription • Nonregistered Cisco.
Obtaining Technical Assistance • Order Cisco learning materials and merchandise • Register for online skill assessment, training, and certification programs If you want to obtain customized information and service, you can self-register on Cisco.com. To access Cisco.com, go to this URL: http://www.cisco.com Technical Assistance Center The Cisco Technical Assistance Center (TAC) is available to all customers who need technical assistance with a Cisco product, technology, or solution.
Obtaining Technical Assistance Cisco TAC Escalation Center The Cisco TAC Escalation Center addresses priority level 1 or priority level 2 issues. These classifications are assigned when severe network degradation significantly impacts business operations. When you contact the TAC Escalation Center with a P1 or P2 problem, a Cisco TAC engineer automatically opens a case. To obtain a directory of toll-free Cisco TAC telephone numbers for your country, go to this URL: http://www.cisco.
Obtaining Technical Assistance Configuring an ADSL WAN Interface Card on Cisco 1700 Series Routers 34 OL-3317-03
