Cisco OSM-12CT3/T1 - Optical Services Module Multiplexor Guía de instalación descargar pdf (Pagina 33)

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Cisco 7600 Series Internet Router Module Installation Guide

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Chapter 1 Product Overview

Hot Swapping Supervisor Engines and Modules

Interface ports maintain the same address regardless of whether other modules are

installed or removed. However, when you move a module to a different slot, the

first number in the address changes to reflect the new slot number. For example,

on a 4-port OC-12c POS OSM in slot 4 of the Cisco 7609 Internet Router, the

address of the top WAN port is 4/1, and the address of the bottom WAN port is

4/4. If you remove the 4-port OC-12c POS OSM from slot 4 and install it in slot 7,

the addresses of those same WAN ports become 7/1 through 7/4.

You can identify module ports by checking the slot and port location on the router.

You can also use software commands to display information about a specific

interface, or all interfaces, in the system. To display information about every

interface, enter the show interfaces command without parameters. To display

information about a specific interface, enter the show interfaces type command

(type being either POS or ATM) with the module (slot) number and port number

in the format show interfaces type [mod/port].

MAC Addresses

All network interface connections (ports) require a unique MAC address. The

MAC address of an interface is stored in electrically erasable programmable

read-only memory (EEPROM) on a component that resides directly on the

interface circuitry. The router system code reads the EEPROM for each interface

in the system, learns the MAC addresses, and then initializes appropriate

hardware and data structures. Each VLAN in the spanning tree has one unique

MAC address. This addressing scheme gives the router the intelligence to identify

the state (connected or not connected) of each interface. When you hot swap a

module, the MAC address changes with the module.

Hot Swapping Supervisor Engines and Modules

The Cisco 7600 series Internet Router provides a feature for removing and

replacing the redundant supervisor engine, OSMs, and Catalyst 6000 family

modules without powering down the system. This feature is known as hot

swapping.

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Cisco OSM-12CT3/T1 - Optical Services Module Multiplexor Guía de instalación Pagina 33