52 Installing the Nortel Ethernet Routing SwitchNote: To create a stack connection, order the appropriate NortelEthernet Routing Switch 5500 Series cascade cables to ensure fail-safestacking. These cables are not provided with the switch.The following illustration demonstrates the proper crossover connectionconfiguration. Failure to use this configuration can result in loss ofconnectivity.Connecting cascade cables1. Base Unit2. Cascade Cable3. Cascade Cable (used for return)Stack configurationSwitches in a stack must be configured to perform as either the base ornon-base units in the stack. The base unit performs important tasks duringstack functioning and it is important that only one switch be designatedas base.These stack configuration tasks can be performed using either the UserInterface (UI) button on the front panel of the switch or the Unit Select switchon the back. The following sections describe the procedures for performingthese tasks.Stack configuration using the UI buttonThe UI button can be used to perform a number of stack configuration tasks.This section describes the following tasks:• "Setting the Base Unit" (page 53)• "Setting the Non-Base Units" (page 53)• "Resetting the stack" (page 54)Nortel Ethernet Routing Switch 5500 SeriesInstallationNN47200-300 2.00 Standard5.0 7 July 2006Copyright © 2005 - 2006, Nortel Networks Nortel Networks Confidential.
