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The Cisco AS5800 universal access server is the latest entry into Cisco's award-winning AS5x00 series of universal access servers, and provides the highest concentration of modem and integrated services digital network (ISDN) terminations available in a single remote access concentrator product. The Cisco AS5800 is specifically designed to meet the demands of large service providers such as post, telephone, and telegraphs (PTTs), regional Bell operating companies (RBOCs), interexchange carriers (IXCs), and large Internet service providers (ISPs). The Cisco AS5800 complies with Network Equipment-Building System (NEBS) Level 3 requirements as defined by Telcordia Technologies SR-3580, and European requirements are defined by the European Telecommunication Standards Institute (ETSI). Cisco offers a full spectrum of lifecycle-focused support solutions that are complementary to the Cisco AS5800. Further, the Cisco AS5800 voice gateway enables highly scalable deployment of toll-quality voice and fax service over packet networks.
This introductory chapter provides a brief profile and review of the Cisco AS5800 hardware components and functionality, signal and data throughput logic, access server management flow, and Cisco IOS software, as well as an information map to this guide.
The Cisco AS5800 is a high-density, ISDN and modem WAN aggregation system that provides both digital and analog call termination. It is intended to be used in service-provider dial point-of-presence (PoP) or centralized-enterprise dial environments. The dial-shelf feature cards and the host router shelf communicate over a nonblocking interconnect that supports 100-Mbps full-duplex service.
The Cisco AS5800 supports high density dial aggregation and integrates with Cisco AS5200 and Cisco AS5300 access servers for scaling your service provider network. The Cisco AS5800 also supports high availability of service through online insertion and removal (OIR) capabilities, and redundant power supplies that are hot swappable. All active components within the dial-shelf chassis support OIR, which allows components to be removed or replaced while the system is powered on. Feature cards can be busied-out through the software to avoid loss of calls.
The Cisco AS5800 includes a Cisco 5814 dial shelf and a Cisco 7206 router shelf. If you are installing multiple access servers, a system controller is available, which provides a "single system" view of multiple POPs.
The system controller for the Cisco AS5800 includes the Cisco 3640 router running Cisco IOS software. The system controller can be installed at a remote facility so that you can access multiple systems through a console port or Web interface. It is also possible to download software configurations to any Cisco AS5800 using Simple Network Management Protocol (SNMP) or a Telnet connection using the TFTP protocols. The system controller also provides performance monitoring and accounting data collection and logging.
In addition to the system controller, a network management system (CiscoWorks) with a graphical user interface (GUI) runs on a UNIX SPARC station and includes a database management system, polling engine, trap management, and map integration.
The dial shelf contains ingress interfaces (CT1/CE1/PRI) that terminate ISDN and modem calls, and break out individual calls (DS0s) from the appropriate telco services. Digital or ISDN calls are terminated onboard the trunk card HDLC controllers, and analog calls are sent to modem resources on the modem cards. As a result, any DS0 can be mapped to any HDLC controller or modem module.You can install multiple ingress interface cards of similar or different types. This enables you to configure your systems as fully operative, port redundant, or card redundant, depending on your needs.
Trunk cards and modem cards are tied together across a time division multiplexing (TDM) bus on the dial-shelf backplane. The backplane TDM bus transmits and receives PCM-encoded analog data to and from the modem cards. Then the dial shelf and the router shelf exchange framed packets via a proprietary interconnect cable for further processing.
The dial shelf also contains a DSC card that provides clock and power control to the dial-shelf feature cards. Each dial-shelf controller card contains a block of logic referred to as the common logic and system clocks. This block generates the backplane Stratum-4 compliant 4-MHz and 8-KHz clocks used for interface timing and for the TDM bus data movement. The common logic can use a variety of sources to generate the system timing, including an E1 or T1 input signal from the BNC connector on the dial-shelf controller card front panel. The clock source can also be telco office timing units (BITS clocking) extracted from the network ingress interfaces.
On the DSC card, only one common logic is active at any one time, which is identified by the CLK (clock) LED on the DSC card front panel. The active common logic is user selectable and is independent from each dial-shelf controller card. This ensures that, if a DSC card needs replacing or if the slave DSC card becomes master, clocking remains stable. The selected common logic should not be changed during normal operation, unless related hardware failure is suspected or diagnosed.
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Note Software support for redundant DSC cards will be available soon. |
The Cisco 7206 router shelf supports call signaling for PRI interfaces; packet processing, and routing; and all commonly used high-speed LAN and WAN interfaces including Fast Ethernet (FE), Asynchronous Transfer Mode (ATM), High-Speed Serial Interface (HSSI), and Fiber Distributed Data Interface (FDDI). These interfaces are supported by common port adapters that are configured on the Cisco 7206 router shelf.
You can install and upgrade software remotely, without affecting current system operation. You can also upload and download configuration files remotely, without affecting current system operation. Remote access is enabled by using SNMP, a Telnet session to a console port on the router shelf, the World Wide Web (WWW) interface, or the optional system controller network management system.
The Cisco AS5800 can dynamically adjust any port to support any user configuration. Individual users can be authenticated as they connect to the system by use of one or more authentication servers using RADIUS and TACACS+ authentication protocols. Primary and backup authentication servers can define user authentication parameters via user domain and the number called. User profile information can also be configured to include time of day, number of simultaneous sessions, and number of B channels used.
A remote LAN user can connect to the Cisco AS5800 via an ISDN line or asynchronous serial connection, be authenticated, and establish a session. In addition to dynamic or static address assignments, this connection requires the traditional Cisco IOS software support for different routing protocols on different ports simultaneously, with virtually no impact on service provider routing tables.
A dial wholesale customer can connect to a Cisco AS5800, and tunnel PPP packet information to a retail service provider using dial virtual private network (dial VPN).
The Cisco AS5800 consists of two primary system components, the Cisco 5814 dial shelf (DS) and the Cisco 7206 router shelf (RS).
For detailed Cisco 7206 router-shelf hardware specifications and functionality, refer to the following documents:
For detailed Cisco 5814 dial-shelf hardware specifications and functionality, refer to the following documents:
The Cisco 5814 dial shelf (DS) houses three primary types of circuit cards or boards. Two of these circuit cards, commonly referred to as Feature Module (FM) are trunk cards and modems. They support online insertion and removal (OIR), a feature that permits dynamic replacement without interrupting system activity. These CE1/T1/T3 trunk cards and DMM modem carriers provide the ingress (signal input) interfaces for the Cisco AS5800. The third circuit card type is the dial-shelf controller (DSC) card that provides dial-shelf chassis control and management interfaces.
The Cisco AS5800 dial-shelf controller (DSC) card is located in slots 13 or 14 on the dial-shelf backplane interconnect bus (BIC). It manages all interfaces through the dial shelf, serves as the dial shelf's direct interface to the router shelf, and facilitates the TDM Bus Clock. The DSC card contains two PC card slots that hold the internal flash (bootflash).
The Cisco 7206 serves as the host router for the Cisco AS5800 and conducts all route/packet route processing functionality of carrying data between the dial shelf and an external network. Full Cisco IOS software functionality is provided on the router shelf. Major components of the Cisco 7206 router shelf are the network processing engine (NPE), dial-shelf interconnect port adaptor (DSI-PA), and the egress interfaces (PAs).
The Cisco 7206 router shelf resides in a standard C7206 chassis, holds the Cisco AS5800's system configuration, performs all Cisco AS5800 routing functions, supports NPE-400, and provides the Cisco AS5800's egress (signal output) interfaces.
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Note A virtual console can be opened from the RS to any feature card (including the DSC). |
The Cisco AS5800 system architecture consists of backplane bus connections that provide communications between the dial shelf and the host router shelf, monitor system environment conditions, and transmit clock/frame pulses to feature/DS controller cards.
For detailed Cisco 7206 router-shelf functionality and hardware specifications refer to the following documents:
This section describes the Cisco AS5800 ROM monitors on the Cisco 7206 router shelf and the Cisco 5814 dial shelf. ROM monitor is the first software to run when the Cisco AS5800 is powered-up or reset.
The router-shelf ROM monitor operates like a regular Cisco 7206 router ROM monitor. For more information on basic router usage, refer to the Cisco 7206 Installation and Configuration Guide, available online at
http://www.cisco.com/univercd/cc/td/doc/product/core/7206/7206ig/.
The dial-shelf ROM monitor is located on dial-shelf controller cards installed in dial-shelf chassis slots 12 and 13. The dial-shelf ROM monitor is configured to autoboot during system power-up or reset. It always attempts to boot from the first image on Flash memory devices in the following sequence:
To boot the system from an image other than the default image, copy the image used to boot as the first file on a PCMCIA Flash memory card and insert the Flash memory card into PCMCIA slot 0 or 1. Reload the dial-shelf controller, which will cause the system to override the default image and reboot the system from the PCMCIA Flash memory card.
Figure 1-1 shows the topology devices used to build dialup access environments.
Corporate users and ISPs may have identical network topologies:
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Note Use a mature Cisco IOS release whenever possible. |
Before Cisco AS5800 equipment is deployed at your site, define the following configuration design parameters:
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Note Uses private RFC 1918 IP addresses. For more information, refer to the Best Current
Practice memo available online at http://www.ietf.org/rfc/rfc1918.txt |
The following list describes IP subnetting plan considerations. Identify network names, assigned subnets, and descriptions.
1. Headquarters block (172.22.0.0/17)
2. Remotes block (172.22.128.0/17)
3. Headquarters-access (172.22.66.0/26)
4. NAS loopback 0 (172.22.99.0/24)
5. NAS loopback 1 (172.22.90.0/24)
The following list describes device parameter considerations.
6. Primary and secondary name servers
9. Network element management server (NTP, SNMP, syslog)
The following list describes dial plan setup considerations.
1. PRI telephone numbers assigned to the T1 trunks. One number is used for testing new modem firmware and the other for isolating debugs for specific users.
3. Username and password for sending test calls into the NAS
Cisco IOS software provides the capability to configure a Cisco AS5800 using command-line interface (CLI) commands.
Use the following helpful reminders when configuring your Cisco IOS software:
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Note Cisco IOS software is feature specific and licensed on an "as is" basis without warranty of any kind, either expressed or implied. The version of Cisco IOS software used in this manual varies depending on configuration requisites for presentation purposes, and should not be construed as the Cisco IOS software version of choice for your system or internetwork environment. Consult your Cisco sales representative regarding your Cisco IOS requirements. |
Cisco routers are configured from user interfaces, known as ports, which provide hardware connectivity. They are accessed from the console port on a router or Telnet into a router interface from another host. Typical interfaces are Serial 0 (S0), Serial 1 (S1), and Ethernet 0 (E0). Token Ring interfaces are referenced as (T0) and FDDI interfaces use (F0).
When using the CLI, a command interpreter, called EXEC, is employed by the operating system to translate any command and execute its operation. This command interpreter has two access modes, user and privileged, which provide security to the respective command levels. Each command mode restricts you to a subset of mode-specific commands.
User mode provides restricted access and limits router configuration or troubleshooting. At this level, miscellaneous functionality is performed, such as viewing system information, obtaining basic router status, changing terminal settings, or establishing remote device connectivity.
Privileged mode includes user mode functionality and provides unrestricted access. It is used exclusively for router configuration, debugging, setting operating system (OS) parameters, and retrieving detailed router status information.
There are many modes of configuration within privileged mode that determine the type of configuration desired, such as interface configuration (5800-1(config-if)#), line configuration (5800-1(config-line)#), and controller configuration (5800-1(config-controller)#). Each configuration command mode restricts you to a subset of mode specific commands.
In the following command sequence, command prompts are automatically modified to reflect command mode changes. A manual carriage return is implied at the end of each line item.
The last message is an example of a system response. Press Enter to get the 5800-1# prompt.
Table 1-1<Xref_Color> lists common configuration modes. Configure global parameters in global configuration mode, interface parameters in interface configuration mode, and line parameters in line configuration mode.
Context-sensitive help is available at any command prompt. Enter a question mark (?) for a list of complete command names, semantics, and command mode command syntax. Use arrow keys at command prompts to scroll through previous mode-specific commands for display.
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Note Cycle through mode-specific commands at a mode-specific prompt. |
For more information about working with the user interface in the Cisco IOS software, refer to the document entitled Configuration Fundamentals Configuration Guide for your Cisco IOS software release, available from the Cisco.com website.
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Note You can press Ctrl-Z in any mode to immediately return to enable mode (5800#), instead of entering exit, which returns you to the previous mode. |
To prevent losing the Cisco AS5800 configuration, save it to NVRAM using the following steps.
5800-1#.
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Note Press Ctrl-Z to return to privileged EXEC mode. Any subsequent system response message is normal and does not indicate an error. |
Step 2 Execute the copy running-config startup-config command to save configuration changes to nonvolatile random-access memory (NVRAM) so configuration data will not be lost during a system reload, power cycle, or outage.
The following message and prompt appears after a successful configuration copy.
To undo a command or disable a feature, enter the keyword no before the command; for example, no ip routing.
This section describes how to start up your Cisco AS5800 and configure it using the prompt-driven setup script.
All Cisco AS5800 interfaces are configured by connecting a terminal station or PC to the Cisco 7206 router-shelf console port. This console port is located on the I/O controller front panel, as shown in Figure 1-3.
To customize your Cisco AS5800 software configuration, you should be familiar with Cisco IOS software. Review the "Cisco IOS Software Fundamentals" section to familiarize yourself with the command-line interface (CLI) commands, then continue with the "Commissioning"chapter for initial step-by-step configuration instructions.
Your Cisco AS5800 requires multiple Cisco IOS software images.
1. Router-shelf image—Cisco IOS software image (c5800-p4-mz) supporting Cisco AS5800 router-shelf functionality, and bundled trunk card and modem card images
2. Router-shelf boot image—Boot helper image (c7200-boot-mz) for Cisco 7206 router shelf
3. Dial-shelf controller image—With boot helper image (dsc-c5800-mz) for Cisco 5814 dial-shelf feature cards
4. Dial-shelf feature board image—Cisco 5814 dial-shelf feature card image (das-c5800-m.ucode) bundled into the router-shelf image
Although four Cisco IOS software images are required, only three software images (Items 1-3) require part numbers for ordering.
The dial-shelf controller image can be upgraded by copying the new image onto a Personal Computer Memory Card International Association (PCMCIA) Flash memory card on the dial-shelf controller card; however, you will soon be able to upgrade the dial-shelf controller image from the network.
Figure 1-4 and Figure 1-5 show a rack-mounted Cisco AS5800 hardware components that require configuration or software monitoring.
When you power ON your Cisco AS5800, it goes through the following boot sequence:
1. A power-on self-test diagnostics program verifies basic operation of the CPU, memory, and interfaces.
2. The system bootstrap software executes and searches for a valid Cisco IOS software image. The Cisco IOS software source image is determined by the configuration register setting. The factory-default setting for the configuration register is 0x2102, which indicates that the router should attempt to load a Cisco IOS software image from Flash memory or over the network (depending on boot configuration commands).
3. If, after five attempts (if netbooting) or one attempt (for a Flash memory boot), a valid Cisco IOS software image is not found in Flash memory, the router reverts to boot the ROM mode, which is used to install or upgrade a Cisco IOS software image.
4. If a valid Cisco IOS software image is found, the router searches for a valid configuration file.
5. If a valid configuration file is not found in nonvolatile random-access memory (NVRAM), the router runs the setup script (also called the system configuration dialog), which enables you to configure your software manually. For normal router operation, you must have a valid Cisco IOS software image in Flash memory and a configuration file in NVRAM.
The system boot process consists of two-stages. When the system is first powered on, the trunk cards and modem cards must receive a small image from the dial-shelf controller card, which is then launched by the ROM monitor. This allows the feature cards the ability to "talk" to the dial-shelf controller card and download the bootloader program. Communication is then made on the backplane, that allows each feature cards to talk with the router shelf the Cisco IOS software image. All cards download the bootloader image simultaneously, which then allows them to "talk" across the proprietary Fast Ethernet connection and request the image needed for each card. A hello message is exchanged between the router shelf and the dial shelf.
Because of this two-step boot process, when you first power ON your system, you might not see the feature card LEDs light immediately.
The dial shelf boots up independently from the router shelf. The dial-shelf controller card (DSC) is the first component to boot up. It is set for autobooting from internal Flash memory. If, however, a PCMCIA Flash memory card is present, the DSC tries to first boot from the card, beginning with slot 0.
The setup script is designed to provide you with the minimum requirements needed to get your router running. The setup script enables your system controller to "talk" to the network. You can then configure your system using command-line interface (CLI) commands, or by downloading a predetermined site configuration file.
Before you power ON your Cisco AS5800 and begin using the setup script, verify that you have:
After you verify the information noted above, perform the configuration steps. Continue with the "Setup-Script Initial Configuration" section.
You can run the setup script from the command line at any time using the setup command. The following commands help enable the setup command from the privileged EXEC mode.
Step 2 Enter your password. You are in privileged EXEC mode when the prompt changes to 5800#.
Step 3 Enter the setup command and press Return. This will initialize the system configuration dialog as described in the previous section "Setup-Script Initial Configuration."
Several passwords are used when configuring your Cisco IOS software. Passwords are used to identify user authorization and permission rights, virtual terminal configuration, and network management software initialization. Most passwords can use the same notation.
You need the following types of passwords when configuring Cisco IOS software:
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Note The enable password and enable secret password should be different. In both cases, you cannot use a number as the first character. Spaces are valid characters, but only when following valid characters; lead spaces are ignored. |
When the system is booted for the first time, NVRAM is blank. Because of this, the system software will automatically ask if you want to enter the setup script (system configuration dialog). After you have a configuration, run the setup script again to change it.
The first step is to power ON your Cisco AS5800. The power switch is located on the Cisco 7206 router-shelf rear panel. Be sure to power on the power entry modules (PEMs), which can be accessed from the Cisco 5814 dial-shelf rear panel. If you are using the optional AC-input power shelf, you also need to power on the AC-input power supplies.
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Note The messages vary, depending on the Cisco IOS software release and feature set you selected. The screen displays in this section are for reference only and might not exactly reflect the messages on your console. |
The system then asks if you would like to enter the system configuration dialog. Answer yes and configure your software using the system configuration dialog.
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Note If you make a mistake, you can exit and run the system configuration dialog again. Press Ctrl-c, and type setup at the enable mode prompt (5800#). |
Step 2 Enter the router-shelf identification number, followed by a dial-shelf identification number. Substitute the default values shown with any numeric value between 0 and 9999.
Basic management setup configures only enough connectivity for management of the system, extended setup will ask you to configure each interface on the system
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Note The Cisco AS5800 uses a "two-bar" (/) command syntax to identify component (also known as "shelf"), interface, and port locations (shelf/slot/port). The shelf identification number will be the first number to be identified in the two-bar command syntax. |
Step 3 Determine whether you want to enter basic management setup configuration and respond to the prompt.
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Note This example assumes you want to enter the basic management setup configuration. Extended configuration information is explained in Chapter 2 "Operations". |
Step 4 Enter the router host name. Substitute your own router host name for the one shown.
Step 5 Enter the enable secret password. The enable secret password is a one-way coded secret used instead of the enable password when it exists. Substitute your own enable secret password for the one shown.
Step 6 Enter the enable password. The enable password is used when there is no enable secret and when using older software and some boot images.
Step 7 Enter the virtual terminal password. Substitute your own virtual terminal password for the one shown.
Step 8 If you plan to use a system controller network management system through which you can administer your Cisco AS5800, enter yes to the following prompt, then enter substitute your own IP address and system controller password when prompted.
Step 9 The system controller supports the Simple Network Management Protocol (SNMP); enter yes at the prompt. The community string is used by the system controller to communicate with its managed shelves. You need to determine a password for this function; the default password is public.
Step 10 Enter the interface information used to connect to the system controller at the prompt.
Enter interface name used to connect to the management network from the above interface summary: Ethernet0/1/0
Step 11 The system then displays current interface summary information, as shown in Table 1-1, that will help you configure your available egress interfaces.
| Interface | IP-Address | OK?1 | Method | Status | Protocol |
|---|---|---|---|---|---|
| 1Any interface listed with OK? value "NO" does not have a valid configuration.
2 |
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Note If you change a shelf-ID number, you must perform a reload before the new shelf-ID is saved in NVRAM. Use the show version command after you have changed a shelf-ID and performed a reload. |
After you enter the interface used to connect to the management network, the system software will automatically display the command script that was just created.
Verify that the command script just created is correct and enter yes at the prompt if you want to save the configuration. If you enter no at the prompt, you will need to repeat the steps described in Table 1-1 until the desired configuration file is achieved.
Selecting choice number [2] builds the configuration into NVRAM as follows:
Press Return to display the privileged EXEC router prompt.
You have just completed a basic Cisco AS5800 startup configuration; however, you will probably need to customize this configuration to further meet your site's requirements.
The following steps describe and suggest a recommended deployment and operation task strategy for the Cisco AS5800 that serves as a functional task flow for this Guide.
Step 2 Cisco AS5800 Provisioning
Step 3 Cisco AS5800 Commissioning
Step 4 Cisco AS5800 Operations
Step 5 Cisco AS5800 Administration
Step 6 Cisco AS5800 Maintenance
Step 7 Advanced Operational Configurations of Functional Components.
Posted: Sun Jan 19 00:44:44 PST 2003
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