Table of Contents

Initially Configuring the ATM Switch Router

This chapter discusses specific steps used to initially configure the ATM switch router.

Note   This chapter provides advanced configuration instructions for the Catalyst 8540 MSR, Catalyst 8510 MSR, and LightStream 1010 ATM switch routers. For conceptual and background information, refer to the . For complete descriptions of the commands mentioned in this chapter, refer to the publication.

This chapter includes the following sections:

Methods for Configuring the ATM Switch Router

The ATM switch router defaults to a working configuration suitable for most networks. However, you might need to customize the configuration for your network.

Note   If your Telnet station or SNMP network management workstation is on a different network from the switch, you must add a static routing table entry to the routing table. See "Configuring ATM Routing and PNNI."

Terminal Line Configuration (Catalyst 8540 MSR)

The Catalyst 8540 MSR has a console terminal line that might require configuration. For line configuration, you must first set up the line for the terminal or the asynchronous device attached to it. For a complete description of configuration tasks and commands used to set up your terminal line and settings, refer to the Configuration Fundamentals Configuration Guide and Dial Solutions Configuration Guide.

You can connect a modem to the console port. The following settings on the modem are required:

You can configure your modem by setting the DIP switches on the modem or by connecting the modem to terminal equipment. Refer to the user manual provided with your modem for the correct configuration information.

Note   Because there are no hardware flow control signals available on the console port, the console port terminal characteristics should match the modem settings.

Terminal Line Configuration (Catalyst 8510 MSR and LightStream 1010)

The ATM switch has two types of terminal lines: a console line and an auxiliary line. For line configuration, you must first set up the lines for the terminals or other asynchronous devices attached to them. For a complete description of configuration tasks and commands used to set up your lines, modems, and terminal settings, refer to the Configuration Fundamentals Configuration Guide and Dial Solutions Configuration Guide.

Configuration Prerequisites

Consider the following information you might need before you configure your ATM switch router:

Verifying Software and Hardware Installed on the ATM Switch Router

When you first power up your console and ATM switch router, a screen similar to the following from a Catalyst 8540 MSR appears:

Note   If an rommon> prompt appears, your switch requires a manual boot to recover. Refer to the Configuration Fundamentals Configuration Guide for instructions on manually booting from Flash memory.

Configuring the BOOTP Server

The BOOTP protocol automatically assigns an Ethernet IP address by adding the MAC and IP addresses of the Ethernet port to the BOOTP server configuration file. When the switch boots, it automatically retrieves the IP address from the BOOTP server.

The switch performs a BOOTP request only if the current IP address is set to 0.0.0.0. (This is the default for a new switch or a switch that has had its startup-config file cleared using the erase command.)

To allow your ATM switch router to retrieve its IP address from a BOOTP server, you must first determine the MAC address of the switch and add that MAC address to the BOOTP configuration file on the BOOTP server. The following steps provide an example of creating a BOOTP server configuration file:

Example

The following example BOOTP configuration file shows the added entry:

Configuring the ATM Address

The ATM switch router ships with a preconfigured ATM address. The Integrated Local Management Interface (ILMI) protocol uses the first 13 bytes of this address as the switch prefix that it registers with end systems. Autoconfiguration also allows the ATM switch router to establish itself as a node in a single-level Private Network-Network Interface (PNNI) routing domain.

Note   If you chose to manually change any ATM address, it is important to maintain the uniqueness of the address across large networks. Refer to the Guide to ATM Technology for PNNI address considerations and for information on obtaining registered ATM addresses.

For a description of the autoconfigured ATM address and considerations when assigning a new address, refer to the .

Manually Setting the ATM Address

To configure a new ATM address that replaces the previous ATM address when running IISP software only, see "Configuring ATM Routing and PNNI.".

To configure a new ATM address that replaces the previous ATM address and generates a new PNNI node ID and peer group ID, see "Configuring ATM Routing and PNNI."

Modifying the Physical Layer Configuration of an ATM Interface

Each of the ATM switch router's physical interfaces has a default configuration, listed in "Configuring Interfaces." You can accept the defaults, or you can override them by reconfiguring the physical interface.

The following example describes modifying an OC-3c interface from the default settings to the following:

To change the configuration of the example interface, perform the following steps, beginning in global configuration mode:

Example

The following example shows how to disable cell-payload scrambling and STS-stream scrambling and changes the SONET mode of operation to Synchronous Digital Hierarchy/Synchronous Transfer Module 1 (SDH/STM-1) of OC-3c physical interface ATM 0/0/0:

To change any of the other physical interface default configurations, refer to the commands in the publication.

To display the physical interface configuration, use the following privileged EXEC commands:

Examples

The following example demonstrates using the show controllers command to display the OC-3c physical interface configuration after modification of the defaults:

The following example displays the OC-3c physical layer scrambling configuration after modification of the defaults using the more system:running-config command:

Configuring the IP Interface

IP addresses can be configured on the multiservice route processor interfaces. Each IP address is configured for one of the following types of connections:

To configure the switch to communicate via the Ethernet interface, provide the IP address and subnet mask bits for the interface.

This section includes the following:

Configuring IP Address and Subnet Mask Bits

Define subnet mask bits as a decimal number between 0 and 22 for Class A addresses, between 0 and 14 for Class B addresses, or between 0 and 6 for Class C addresses. Do not specify 1 as the number of bits for the subnet field. That specification is reserved by Internet conventions.

To configure the IP address, perform the following steps, beginning in global configuration mode:

Note   Since release 12.0(1a)W5(5b) of the ATM switch software, addressing the interface on the processor (CPU) has changed. The ATM interface is now called atm 0, and the Ethernet interface is now called ethernet 0. The old formats (atm 2/0/0 and ethernet 2/0/0) are still supported.

Example

The following example shows how to configure interface ethernet 0 with IP address 172.20.40.93 and subnetwork mask 255.255.255.0:

Displaying the IP Address

To display the IP address configuration, use the following privileged EXEC commands:

Examples

The following example shows how to use the show interfaces command to display the IP address of interface ethernet 0:

The following example uses the more system:running-config command to display the IP address of interface ethernet 0:

Testing the Ethernet Connection

After you have configured the IP address(es) for the Ethernet interface, test for connectivity between the switch and a host. The host can reside anywhere in your network. To test for Ethernet connectivity, use the following EXEC command:

The following example show how to test the Ethernet connectivity from the switch to a workstation with an IP address of 172.20.40.201:

Configuring Network Clocking

This section describes network clocking configuration of the ATM switch router. Properly synchronized network clocking is important in the transmission of constant bit rate (CBR) and variable bit rate real time (VBR-RT) data. For an overview of network clocking and network clock configuration issues, refer to the chapter "Network Clock Synchronization" in the Guide to ATM Technology.

Network Clocking Features

Different types of network clock sources are available on the ATM switch router, both internal and external. Table 3-1 provides a summary of network clocking features.

Configuring Network Clock Sources and Priorities (Catalyst 8540 MSR)

To configure the network clocking priorities and sources, use the following command in global configuration mode:

Note   Specifying the keyword system with the network-clock-select command selects the route processor reference clock (a stratum 4 clock source) or the network clock module (a stratum 3 clock source), if present.

Systems equipped with the network clock module can derive clocking from a Building Integrated Timing Supply (BITS) source. To specify the line type attached to the BITS ports on the network clock module and to assign a priority to a port, use the following commands in global configuration mode:

Examples

The following example shows how to configure the network clock priorities:

Note   This configuration assumes that a full-width module, such as the 4-port OC-12c module, is being used to derive clocking. If port adapters inserted into carrier modules are used, the priority 1 and 2 source ports must be on different port adapters.

The following example shows how to configure the network clock to revert to the highest priority clock source after a failure and takeover by the source with the next lowest priority.

Configuring Network Clock Sources and Priorities (Catalyst 8510 MSR and LightStream 1010)

To configure the network clocking priorities and sources, use the following command in global configuration mode:

Note   Specifying the keyword system with the network-clock-select command selects the route processor reference clock (a stratum 4 clock source).

Examples

The following example shows how to configure the network clock priorities:

The following example shows how to configure the network clock to revert to the highest priority clock source after a failure and takeover by the source with the next lowest priority.

Configuring the Transmit Clocking Source

To configure where each interface receives its transmit clocking, perform the following steps, beginning in global configuration mode: