User manual FOUNDRY NETWORKS EDGELRON 4802CF

[. . . ] Foundry EdgeIron Series Installation and Basic Configuration Guide 4980 Great America Parkway Santa Clara, CA 95054 Tel 408. 207. 1700 www. foundrynetworks. com March 2006 Copyright © 2006 Foundry Networks, Inc. No part of this work may be reproduced in any form or by any means ­ graphic, electronic or mechanical, including photocopying, recording, taping or storage in an information retrieval system ­ without prior written permission of the copyright owner. The trademarks, logos and service marks ("Marks") displayed herein are the property of Foundry or other third parties. You are not permitted to use these Marks without the prior written consent of Foundry or such appropriate third party. [. . . ] When the stack reboots and resumes operations, note that the IP address will be the same for both of the stack segments. To resolve the conflicting IP addresses, you should manually replace the failed link or unit 9-6 © 2006 Foundry Networks, Inc. March 2006 Installing an EdgeIron Switch as soon as possible. If you are using a wrap-around stack topology, a single point of failure in the stack will not cause the stack to fail. If the Master unit fails or is powered off, the backup unit will take control of the stack without any loss of configuration settings. The Slave unit with the lowest MAC address is selected as the backup unit. Note: The stacking feature requires that all stacking module ports be connected and the switches powered on. If there is a change to the stack topology the stack will reboot. Note: It is not possible to stack the EdgeIron 24GS nor EdgeIron 48GS with other switches in the EdgeIron range. Operational Concepts EdgeIron 24GS or 48GS switches can be stacked together as described later in this section. The stack functions as an integral system for easy management through a common interface. It provides robust and reliable operation through a centralized stacking topology in which one unit in the stack acts as the Master for configuration tasks and firmware upgrade. All of the other units function in Slave mode, but can automatically take over management of the stack if the Master unit fails. For management purposes, the stack functions as single integrated system. The Master Unit represents the whole stack for all of the normal configuration tasks, and can be accessed through any port (on any switch in the stack) that is assigned to the management VLAN. This allows you to use a single IP address to manage every unit in the stack. The Master unit processes each management request and forwards information on the required task to the slave units for completion. The EdgeIron 24GS or 48GS have two fixed stacking ports on the rear panel (i. e. , one uplink port and one downlink port). Each stacking port operates up to 10 Gbps each way in full duplex mode, supporting a bandwidth of up to 20 Gbps, or a total stacking bandwidth of up to 40 Gbps when traffic is flowing between two different source-destination pairs on each of the stacking ports. EdgeIron 24GS or EdgeIron 48GS can be stacked together, but the number of units you can have in a stack depends on whether or not a 10GBASE module is installed in the units. Table 26. 1 and Table 26. 2 show the number of units permitted in a stack. If no optional 10GBASE modules are installed on the units, then you can stack up to eight 24GS or eight 48GS units. March 2006 © 2006 Foundry Networks, Inc. 9-7 Foundry EdgeIron Family Installation Guide Table 9-1 Number of Stacking Units Without 10GBASE module Permitted in a Stack Number of Units in a Stack 1 2 3 4 5 6 7 8 Number of 10GBASE modules in a Stack 0 0 0 0 0 0 0 0 Permitted 24GS Yes Yes Yes Yes Yes Yes Yes Yes 48GS Yes Yes Yes Yes Yes Yes Yes Yes However, if you install a 10GBASE module in the units, you can have up to eight 24GS in a stack, but only six 48GS in a stack. Table 9-2 Number of Stacking Units With 10GBASE module Permitted in a Stack Number of Units in a Stack 1 2 3 4 5 6 7 8 Number of 10GBASE modules in a Stack 1 2 3 4 5 6 7 8 Permitted 24GS Yes Yes Yes Yes Yes Yes Yes Yes 48GS Yes Yes Yes Yes Yes Yes No No Functionalities When the stack is powered on (i. e. , via either a cold start or software reset), each unit in the system initiates the normal boot process. After the system completes the boot-up process, one unit in the stack will be elected as the stack master, and the remaining units will operate in slave mode. The stack master will manage the entire stack as a single entity via a single management IP address. When any switch in the stack fails, the remaining switches will remain operational and isolate the failed switch so that the only ports affected by the failure are on the failed switch. 9-8 © 2006 Foundry Networks, Inc. March 2006 Installing an EdgeIron Switch In a looped stack (ring-topology) stacking, an extra cable is connected between the top and bottom switches forming a "ring" or "loop. " The loop cable provides a redundant path for the stack link, so if one link fails, stack communications can be maintained. [. . . ] The successor IEEE 802. 3 standard provides for integration into the OSI model and extends the physical layer and media with repeaters and implementations that operate on fiber, thin coax and twisted-pair cable. Fast Ethernet A 100 Mbps network communication system based on Ethernet and the CSMA/CD access method. Full Duplex Transmission method that allows two network devices to transmit and receive concurrently, effectively doubling the bandwidth of that link. Gigabit Ethernet A 1000 Mbps network communication system based on Ethernet and the CSMA/CD access method. [. . . ]