Customer Order Number: Documentation Part Number: DOC-784256= 78-4256-01 ATM Cable Interface Processor (ACIP) Installation and Configuration Product Numbers: ACIP-SM(=) This publication contains instructions for installing and performing a basic configuration of the Asynchronous Transfer Mode (ATM) Cable Interface Processor (ACIP). This publication contains basic configuration steps and examples.
ATM Terms and Acronyms ATM Terms and Acronyms The following are common ATM terms and acronyms for your reference: AAL—ATM Adaptation Layer. An AAL defines the conversion of user information into cells. AAL1 and AAL2 handle isochronous traffic, such as voice and video; AAL3/4 and AAL5 pertain to data communications through the segmentation and reassembly of packets. ATM—Asynchronous transfer mode.
Asynchronous Transfer Mode Overview SONET—Synchronous Optical Network. An ATM UNI specification and American National Standards Institute (ANSI) standard (T1.105-1988) for optical digital transmission at hierarchical rates from 51.840 Mbps (STS-N) to 2.5 Gbps and greater. SONET OC3—Optical Carrier-3 specification. SSCOP—Service Specific Connection Oriented Protocol. SSCOP Resides in the service specific convergence sublayer of the ATM adaptation layer.
ACIP Description An ATM connection transfers raw bits of information to a destination router/host. The ATM router takes the common part convergence sublayer (CPCS) frame, carves it up into 53-byte cells, and sends these cells to the destination router or host for reassembly. Forty-eight bytes of each cell are used for the CPCS data; the remaining 5 bytes are used for cell routing. The 5-byte cell header contains the destination VPI/VCI, payload type, cell loss priority (CLP), and header error control.
ACIP Description ACIP Interface The ACIP’s ATM interface is full duplex. You must use the appropriate ATM interface cable to connect the ACIP with external ATM equipment. (Refer to the section “ACIP Cables, PLIM, and Connections,” on page 7, for descriptions of ATM cables and connectors.) The ACIP provides an interface to ATM switching fabrics for transmitting and receiving data at rates of up to 155 Mbps bidirectionally; the actual rate is determined by the PLIM.
ACIP Description Table 2 Typical Fiber-Optic Link Attenuation and Dispersion Limits Limits Multimode Attenuation 1.0 dB/km Dispersion 500 MHzkm1 1. The product of bandwidth and distance must be less than 500 MHzkm. Approximating the ACIP Power Margin The LED used for a multimode transmission light source creates multiple propagation paths of light, each with a different path length and time requirement to cross the optical fiber, causing signal dispersion (smear).
ACIP Description For the ACIP, the signal must meet the worst case parameters listed in Table 4.
ACIP Description Duplex SC-Type Connector Figure 3 Simplex SC-Type Connector H2399 H2214 Figure 2 The multimode cable connects to the SC connector on the PLIM. (See Figure 4.) SONET Multimode SC Duplex PLIM H2210 Figure 4 The SONET multimode SC-type duplex connector is shipped with a dust plug. (See Figure 5.) Remove the plug by pulling on the plug as you squeeze its sides.
ACIP Installation Prerequisites ACIP Installation Prerequisites Before you begin the ACIP installation, review the guidelines in this section to ensure a successful installation, to avoid injuring yourself, or to avoid damaging the equipment. This section also provides a list of parts and tools you will need to perform the installation. ACIP Software Prerequisites To ensure correct operation of the ACIP, Cisco IOS Release 11.2(7)P or later is required.
ACIP Installation Prerequisites Figure 7 shows the rear of the 7-slot Cisco 7507 router. In the Cisco 7507, up to two slots (2 and 3) are reserved for the Route Switch Processor (RSP2), which contains the system processor and performs packet switching functions. Slots 0 and 1, and 4 through 6 are for interface processors, including the ACIP. (There are no restrictions on slot locations or sequence; you can install an ACIP in any available interface processor slot.
ACIP Installation Prerequisites Figure 8 shows the rear of the 13-slot Cisco 7513. In the Cisco 7513, up to two slots (6 and 7) are reserved for the Route Switch Processor (RSP2), which contains the system processor and performs packet switching functions. Slots 0 through 5, and 8 through 12 are for interface processors, including the ACIP. (There are no restrictions on slot locations or sequence; you can install an ACIP in any available interface processor slot.
ACIP Installation Prerequisites List of Parts and Tools You need the following tools and parts to install or upgrade an ACIP. If you need additional equipment, contact your service representative for ordering information. • ACIP-SM(=) and an empty interface processor slot in your Cisco 7500 series router Note The ACIP is not supported in Cisco 7500 series routers with an RSP4 installed. Only RSP1s and RSP2s can be used with the ACIP.
ACIP Installation Prerequisites Attention Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant causer des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers posés par les circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents.
ACIP Installation Prerequisites Electrical Equipment Follow these basic guidelines when working with any electrical equipment: • Before beginning any procedures requiring access to the chassis interior, locate the emergency power-off switch for the room in which you are working. • Disconnect all power and external cables before moving a chassis; do not work alone if potentially hazardous conditions exist. • • • Never assume that power is disconnected from a circuit; always check.
ACIP Installation Prerequisites • When removing an ACIP, use the ejectors to release the bus connectors from the backplane. Hold the handle on the front of an ACIP with one hand and support the bottom edge of the metal carrier with the other hand. Pull the carrier out slowly, using your hand along the bottom of the carrier to guide an ACIP straight out of the slot. • Handle carriers by the handles and carrier edges only; avoid touching the board or any connector pins.
Installing and Removing an ACIP Installing and Removing an ACIP An ACIP slides into slots in the rear of a Cisco 7500 series chassis and connects directly to the backplane. The backplane slots are keyed so that the ACIP can be installed only in the slots designated for it. (For interface processor slot locations, refer to section “Hardware and Host Router Prerequisites” on page 9.) Figure 9 shows the procedures for removing and installing an ACIP.
Attaching Network Interface Cables to the ACIP Attaching Network Interface Cables to the ACIP The ACIP interfaces are full duplex. You must use the appropriate ATM interface cable to connect the ASIP to your TeraLink 1000, either directly, or through an external ATM network. Connect cables to the ACIP as shown in Figure 10.
Using LEDs to Check ACIP Status After you install the ACIP and attach the interface cable between the ACIP’s interface port and your cable headend (TeraLink 1000) or external ATM switch, verify the installation by observing the LED states and the console display. When the system has reinitialized all interfaces, the enabled LED on the ACIP should go on. The console screen will also display a message as the system discovers each interface during its reinitialization.
Using show Commands to Verify Interface Status Step 6 If this installation was a replacement ACIP, use the show interfaces or show controllers cbus command to verify the status of the ATM interface. (For command descriptions and examples, refer to the section “Using show Commands to Verify Interface Status” on page 19.) Step 7 When the interface is up, check the activity of the interface with the ACIP LEDs. (See Figure 11.
Using show Commands to Verify Interface Status Following is an example of the show controller cbus display. Note the display of the ACIP’s microcode version (20.2), PLIM type (SONET), and available bandwidth (155 Mbps).
Configuring the ACIP Configuring the ACIP Configuring the ACIP is a two step process: first you configure the ACIP, then you configure the cable headend and/or ATM switch. To configure ATM, complete the following tasks. The first two tasks are required, and then you must configure at least one PVC or SVC. The VC options you configure must match in three places: on the router, on the ATM switch, and at the remote end of the PVC or SVC connection. • • • Enable the ACIP. Configure cable parameters.
Configuring the ACIP Configure an ACIP Interface The ACIP interface (or subinterface) uses the configuration defaults shown in Table 1. For information on how to change the defaults, refer to the “Configuring ATM” chapter of the Wide-Area Networking Configuration Guide and the “Configuring Interfaces” chapter of the Configuration Fundamentals Configuration Guide. All ATM and interface commands might not be applicable to the ACIP interface.
Configuring the ACIP Configure Cable Parameters To assign the ATM interface on the ACIP to a cable headend and specify the cable headend IP address, perform the following tasks beginning in global configuration mode: Task Command Step 1 Specify the ATM interface, VPI, and headend IP address. cable bind interface vpi ip-address Step 2 Optionally, enable proxy-ARP handling if user-to-user communication is permitted for each channel.
Configuring the ACIP To create a bridge-group virtual interface, perform the following tasks in interface configuration mode: Task Command Step 1 Enable a bridge-group virtual interface. interface bvi bridge-group Step 2 Specify the IP address for the interface. ip address ip-address mask Step 3 Disable the sending of redirect messages. no ip redirects Step 4 Optionally, enable fast-switching on the interface.
Configuring the ACIP Monitor and Maintain the ACIP After configuring the new interface, you can display its status. You can also display the current status of connections and active modems on each interface. To show current status information, perform the following tasks in EXEC mode: Task Command Display the configured cable channels status. show cable channel Display the active modems. show cable modem Display the ATM interface status.
ACIP Error Statistics ACIP Error Statistics The ACIP maintains a count of certain errors. In addition to keeping a count of these errors, the ACIP also takes a snapshot of the last VCI/VPI that caused the error. Each ACIP error counter is 16 bits.
Using the Debug ATM Commands • Use the show atm vc n command to display statistics for a given PVC, where n is the VCD. The following is sample output from the show atm vc n command, with VCD 1 specified: Router# show atm vc 1 ATM3/0.
Examples of ATM Error Messages • To display ATM events, use the debug atm events command: This command displays event changes to the ACIP. Reset, VC configurations, ACIP configurations, and PLIM failures are displayed. After you use a debug command, turn off debugging with the no debug command. Following are additional debug commands specifically related to the ACIP: • To display changes in connectivity to the TeraLink system, use the debug cable channel command.
Examples of ATM Error Messages Error Message AIP_love_note(ATM2/0): asr=0xaaaa Explanation Received a love note from the ACIP. Love notes are messages that the ACIP passes to the RSP to indicate an action or event has taken place. For example, the ACIP signals the RSP with a love note when the ACIP completes a VC setup/teardown request. Another love note signals to the RSP that CD sense has changed. The ASR is a bit mask that defines the actions that might have taken place.
Examples of ATM Error Messages Following is a list of possible error messages displayed when you enter the debug atm errors command: Error Message AIP_love_note(ATM2/0): UNKNOWN asr=0x0000 Explanation A bad love note message was passed back by the ACIP. Error Message AIP_setup_vc(ATM2/0): TIQ err. VC 1 peak 1000 avg. 1 rateq rate 2 Explanation Indicates that a VC SETUP failed because the average rate requested could not be configured on the ACIP.
Examples of ATM Error Messages Error Message atm_pakalign(ATM2/0): Invalid VC(65535) received, type=0xaaaa Explanation A packet was received by the ACIP with a VC that is out of the valid range of VCs. Error Message atm_pakalign(ATM2/0): VC(1) NOT configured, type=0xaaaa Explanation A packet was received by the ACIP for which a VC is not configured.
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