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Cisco IOS Software Releases 12.2 T

AutoInstall over Frame Relay-ATM Interworking Connections

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AutoInstall over Frame Relay-ATM Interworking Connections

Feature Overview

Benefits

Restrictions

Related Features and Technologies

Related Documents

Supported Platforms

Supported Standards, MIBs, and RFCs

Prerequisites

Configuration Tasks

Configuring the New Router

Configuring the Intermediate Frame Relay-ATM Switching Device

Configuring the Central Router

Monitoring and Maintaining AutoInstall over Frame Relay-ATM

Configuration Examples

Configuring the New Router Example

Configuring the Intermediate Frame Relay-ATM Switch Example

Configuring the Central Router Example

Command Reference


AutoInstall over Frame Relay-ATM Interworking Connections

Feature History

Release
Modification

9.1

The AutoInstall feature was introduced.

10.3

The AutoInstall over Frame Relay feature was introduced.

12.1(5)T

The AutoInstall Using DHCP for LAN Interfaces feature was introduced.

12.2(4)T

This feature was introduced.

12.2(4)T2

Support for the Cisco 7500 series was added.


This document describes the AutoInstall over Frame Relay-ATM Interworking Connections feature in Cisco IOS Release 12.2(4)T. It includes the following sections:

•Feature Overview

•Supported Platforms

•Supported Standards, MIBs, and RFCs

•Prerequisites

•Configuration Tasks

•Monitoring and Maintaining AutoInstall over Frame Relay-ATM

•Configuration Examples

Feature Overview

AutoInstall is a Cisco IOS software feature that allows the first-time configuration of new Cisco routers from a remote location. The AutoInstall process involves connecting a new router to a network on which there is an existing preconfigured router, turning on the new router, and enabling it with a configuration file that is automatically downloaded from a TFTP server. This process was designed to facilitate the management of router installation at remote sites from a central location.

The AutoInstall process begins any time a Cisco IOS software-based device is turned on and a valid configuration file is not found in NVRAM. A configuration file is typically not available when a router is turned on for the first time or when the configuration file has been manually deleted from NVRAM.

The AutoInstall over Frame Relay-ATM Interworking Connections feature extends the functionality of the existing Cisco IOS AutoInstall feature. While AutoInstall over Frame Relay encapsulated serial interfaces has long been supported, this feature provides the same functionality when the central (existing) router has an ATM interface instead of a Frame Relay interface.

A typical topology for this feature, as illustrated in Figure 1, consists of a new router connected by a serial interface to a Frame Relay network. The Frame Relay network is connected to a a central router with an ATM interface over Frame Relay-ATM interworking/FRF.8 connection. The central router acts as a BOOTP server for AutoInstall requests, and it forwards AutoInstall TFTP requests to another device in its local network.

Figure 1 Example Topology for AutoInstall over Frame Relay/ATM

Prior to this release, AutoInstall used Cisco encapsulation for BOOTP and TFTP requests over Frame Relay networks. The AutoInstall over Frame Relay-ATM Interworking Connections feature modifies the AutoInstall process to use the Frame Relay encapsulation defined by the IETF standard instead of the Cisco-defined Frame Relay encapsulation.

The basic AutoInstall process over a Frame Relay-ATM interworking connection is as follows:

1. The serial port of the new router is connected to the network, and the new router is turned on.

2. AutoInstall brings up the interface as a Frame Relay interface and learns the data-link connection identifier (DLCI) of the connection.

3. A temporary map is built using the DLCI.

4. A BOOTP request is sent out by the new router over the intermediate Frame Relay-ATM connection to a central router running a BOOTP server.

5. The BOOTP server on the central router replies to the request with an IP address assignment for the new router.

6. The new router sends a broadcast TFTP request for a configuration file. The central router uses a preconfigured IP helper address to forward this request to the TFTP server.

7. A configuration file is downloaded by the new router from the TFTP server, and the new router loads this file.

8. The AutoInstall process ends, and the new router is up and running.

Benefits

The AutoInstall over Frame Relay-ATM Interworking Connections feature allows you to use a router with an ATM interface as a BOOTP server for new routers being connected at remote locations.

Restrictions

AutoInstall over Frame Relay-ATM can be initiated only from the first serial port of the new router (serial interface 0 or serial interface x/0).

AutoInstall IP address resolution using DHCP for serial interfaces is not supported in this feature.

Related Features and Technologies

•Cisco IOS AutoInstall

•Frame Relay-ATM Interworking (FRF.8 Service Interworking)

Related Documents

•Cisco IOS Wide-Area Networking Configuration Guide, Release 12.2; "Configuring ATM," "Configuring Frame Relay," and "Configuring Frame Relay-ATM Interworking" chapters

•Cisco IOS Configuration Fundamentals Configuration Guide, Release 12.2; "Using AutoInstall and Setup" chapter

Supported Platforms

•Cisco 1700 series

•Cisco 2500 series

•Cisco 2600 series

•Cisco 3600 series (Cisco 3620, 3640, and 3660)

•Cisco 7200 series

•Cisco 7500 series (Cisco IOS Release 12.2(4)T2 and later)

Determining Platform Support Through Feature Navigator

Cisco IOS software is packaged in feature sets that support specific platforms. To get updated information regarding platform support for this feature, access Feature Navigator. Feature Navigator dynamically updates the list of supported platforms as new platform support is added for the feature.

Feature Navigator is a web-based tool that enables you to quickly determine which Cisco IOS software images support a specific set of features and which features are supported in a specific Cisco IOS image.

To access Feature Navigator, you must have an account on Cisco.com. If you have forgotten or lost your account information, send a blank e-mail to cco-locksmith@cisco.com. An automatic check will verify that your e-mail address is registered with Cisco.com. If the check is successful, account details with a new random password will be e-mailed to you. Qualified users can establish an account on Cisco.com by following the directions at http://www.cisco.com/register.

Feature Navigator is updated regularly when major Cisco IOS software releases and technology releases occur. For the most current information, go to the Feature Navigator home page at the following URL:

http://www.cisco.com/go/fn

Supported Standards, MIBs, and RFCs

Standards

FRF.8—"Frame Relay/ATM PVC Service Interworking Implementation Agreement"

MIBs

No new or modified MIBs are supported by this feature.

RFCs

No new or modified MIBs are supported by this feature.

Prerequisites

Tasks in this document assume that a Frame Relay network and an ATM network have been configured between the new router performing AutoInstall and the central router processing the BOOTP and TFTP requests from the new router.

A configuration file for the new router must be provided on a TFTP server on the LAN connected to the central router.

For details on these prerequisites, see the documents listed in the "Related Documents" section.

Configuration Tasks

The AutoInstall process over Frame Relay-ATM connections consists of the following elements:

•A new router that initiates the AutoInstall process when connected to the network

•An intermediate Frame Relay-ATM switching device

•Acentral router, acting as a BOOTP server, that provides an initial IP address to the new router and forwards the TFTP requests for a configuration file to and from a TFTP server

See the following sections for configuration tasks required for these elements:

•Configuring the New Router

•Configuring the Intermediate Frame Relay-ATM Switching Device

•Configuring the Central Router

Configuring the New Router

No configuration is required on the new router. When the serial interface is connected to the network, the AutoInstall process begins automatically. If a terminal is connected to the new router, the AutoInstall process can be expedited by responding to the prompts as shown here: 

--- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: no

Would you like to terminate autoinstall? [yes]: no

Please Wait. Autoinstall being attempted over Serial0 !!!!!!

If no input is entered at the System Configuration Dialog prompt, the AutoInstall process will begin automatically after about one or two minutes.

Configuring the Intermediate Frame Relay-ATM Switching Device

No configuration specific to the AutoInstall process is required on the intermediate Frame Relay-ATM switching device. A typical configuration for the intermediate device is provided in the "Configuration Examples" section.

Configuring the Central Router

The IP address for the TFTP server must be specified on the central router. This address is specified using the protocol ip address broadcast ATM VC configuration mode command for the PVC interface that receives the AutoInstall requests.

The PVC interface that processes incoming AutoInstall requests can reside on a physical interface, a point-to-point interface, or a multipoint interface.

To configure the ATM interface that will receive the BOOTP and TFTP requests from the new router during the AutoInstall process, use the following commands beginning in global configuration mode:

 
Command
Purpose

Step 1  

Router(config)# interface atm 
slot/port.subinterface-number {multipoint | 
point-to-point}

Enters interface configuration mode for the interface that will receive the AutoInstall requests from the new router.

Step 2  

Router(config-if)# ip address address mask

Assigns an address to the interface being configured, and specifies the BOOTP server address to be used during the AutoInstall process.

Step 3 

Router(config-if)# ip helper-address address

Specifies the IP address of the TFTP server to be used during the AutoInstall process. This address is the destination address for the TFTP server requests.

You can configure multiple TFTP server targets by using multiple ip helper-address commands.

Step 4 

Router(config-if)# pvc [name] vpi/vci

Specifies the PVC connection for the interface and enters ATM virtual circuit (VC) configuration mode.

Step 5 

Router(config-if-atm-vc)# protocol ip address broadcast

Specifies the IP address of the other end of the PVC connection.

In the AutoInstall process, this command specifies the address for the Frame Relay interface on the new router. In other words, the address specified in this command is the IP address that will be returned in the BOOTP reply.

To configure the interface connected to the LAN with the TFTP server, use the following commands beginning in global configuration mode:

 
Command
Purpose

Step 1  

Router(config)# interface ethernet slot/port

Enters interface configuration mode for the interface that forward and receive TFTP requests during the AutoInstall process.

Step 2  

Router(config-if)# ip address address mask

Assigns an address to the interface being configured. (This address will be used by the TFTP server to return responses to the central router.)

Step 3  

Router(config-if)# keepalive interval

(Optional) Generates tests packet at the specified interval to insure that link is active.

Monitoring and Maintaining AutoInstall over Frame Relay-ATM

To monitor activity related to the AutoInstall process on the Frame Relay-AMT switch, use any of the following commands in EXEC mode:

Command
Purpose 
Router# debug frame-relay event

Displays debugging information about the packets received on a Frame Relay interface. 

router# show connect all

Displays the ID, name, and states of the connected Frame Relay or ATM interworking segments. 

router# show atm vc vcd-number

Displays information specific to the specified virtual circuit (VC), including traffic information. The VC is identified using its virtual circuit descriptor (VCD) number.


To monitor BOOTP and TFTP transfers on the central router for the purposes of troubleshooting, use any of the following commands in EXEC mode:

Command
Purpose 
router# debug ip packet

Displays general IP debugging information. 

router# debug ip udp

Displays general UDP debugging information. 

router# debug ip dhcp

Displays DHCP debugging information.This command can be used to display BOOTP activity.


Configuration Examples

This section provides the following configuration examples:

•Configuring the New Router Example

•Configuring the Intermediate Frame Relay-ATM Switch Example

•Configuring the Central Router Example

Configuring the New Router Example

In the following example, a console terminal is connected to the new router before it is powered on, and the AutoInstall process is started manually by the user: 

         --- System Configuration Dialog ---

Would you like to enter the initial configuration dialog? [yes/no]: no

Would you like to terminate autoinstall? [yes]: no

Please Wait. Autoinstall being attempted over Serial0 !!!!!!

Configuring the Intermediate Frame Relay-ATM Switch Example

Note Note: No configuration specific to the AutoInstall process is needed on the intermediate Frame Relay-ATM switch. This example is provided only to illustrate a typical configuration.

In the following example, the Frame Relay-ATM router switch is configured for FRF.8 capability: 


frame-relay switching

mode atm.

interface Serial 2/0

 no ip address

! The following command specifies that IETF encapsulation

! should be used on the Serial 2/0 interface.

 encapsulation frame-relay IETF

 no ip route-cache

 no ip mroute-cache

 clockrate 64000

 frame-relay interface-dlci 153 switched

 frame-relay lmi-type ansi

 frame-relay intf-type dce

interface ATM0 

 no ip address

 no ip mroute-cache

 no ip route-cache

 no atm ilmi-keepalive

 pvc 0/50 

        encapsulation aal5mux fr-atm-srv

connect s1 Serial 3/1 153 ATM 5/0 0/33 service-interworking

 efci-bit map-fecn

Configuring the Central Router Example

In the following example, the central router is configured to process incoming AutoInstall requests on the ATM 2/0.1 interface, and it is configured to send and receive TFTP messages on the Ethernet 1/0 interface: 


interface atm 2/0.1 point-to-point

! The following command specifies the BOOTP server address.

 ip address 1.1.1.1 255.255.255.0 

! The following command specifies the helper address that 

! points to the TFTP server.

 ip helper-address 223.255.252.13

! The following command specifies the PVC on which the BOOTP

! and TFTP messages travel between the new router and

! the central router (the FR-ATM connection)

 pvc 0/50

! The following command specifies the 

! address to be returned in the BOOTP reply

! (assigns a temporary IP address to the new router).

 protocol ip 1.1.1.2 broadcast

interface Ethernet 1/0

 ip address 128.13.1.99 255.255.255.0

Note Because the BOOTP server is enabled by default, no addtional BOOTP configuration needed. If the BOOTP server has been disabled on the central router, use the ip bootp server command in global configuration mode to renable BOOTP services.

Command Reference

No new or modified commands are introduced with this feature. All commands used with this feature are documented in the Cisco IOS Release 12.2 command reference publications.