- Cisco IOS images are copyrighted, you need a CCO log on to the Cisco website (free) and a contract to download them. There are others ways for getting them but advising you of that would be against Cisco's legal protection and I do a lot with Cisco and so will not suggest them.
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Contents
Introduction
This document explains the step-by-step procedure to upgrade the software image on Cisco Catalyst 3550 series switches with use of the command-line interface (CLI).
Prerequisites
Requirements
Before you attempt this configuration, ensure that you are familiar with these topics for Catalyst 3550:
Naming conventions
Feature sets
File systems and boot parameters
Setup of a TFTP server and backup of the configuration
If you are not familiar with the topics, see the Prepare to Upgrade section of this document before you attempt the software upgrade.
If you already meet the requirements, skip any or all of these topics. Go directly to the Software Upgrade Procedure for 3550 Series Switches section of this document.
Components Used
This document is not restricted to specific software and hardware versions.
Conventions
Refer to the Cisco Technical Tips Conventions for more information on document conventions.
Background Information
A software image upgrade can be necessary for these reasons:
You want to implement new features in your network that are available in the later software release.
You want to install a new line card that the current software version does not support.
A known bug has affected your switch. The later software release resolves the bug.
This document does not cover the upgrade procedure that uses Cisco Cluster Management Suite (CMS). For details on this procedure, complete these steps:
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Open the CMS application.
Choose Administration > Software Upgrade. Photoshop cs6 raw plugin download mac.
From the menu bar, choose Help.
Prepare to Upgrade
Understand File Extensions: .bin and .tar Files
There are two types of files or file extensions that you see when you download 3550 software from the LAN Switches section of Downloads - Switches (registered customers only) .
The .bin file is the Cisco IOS® Software image. If you only want to use the CLI to manage the switch, the .bin file is the only file to download.
The .tar file is an archive file. The upgrade process extracts both the Cisco IOS image and the CMS files from the .tar file. If you want to manage switches or clusters of switches through a web interface, such as HTML, this file is the only file to download.
Note: When you download a .tar image, the archive utility that is on your PC saves the file. This utility can be WinZip or some other third-party software. There is no need to manually extract the files in archive. The extraction occurs automatically during the upgrade process.
Understand 3550 Software Image Naming Conventions: SMI and EMI
The 3550 is either a Layer 2 (L2) or Layer 3 (L3) switch, which depends on the software version and feature set that you install.
The naming conventions for 3550 images begin with either of these:
The differences between the two are:
The SMI image is essentially an L2-only image. However, Cisco IOS Software Release 12.1(8)EA1b includes enhancements to the L2 feature set. This release and later SMI releases use the term 'Layer2+'. Cisco IOS Software Release 12.1(11)EA1 adds basic L3 functionality to the SMI image. This L3 functionality includes static unicast routing, the Routing Information Protocol (RIP), and other features. This release and later SMI releases use the phrase 'basic Layer 3 routing features'.
The EMI image is an L2 image in combination with a full L3 feature set. This feature set includes:
Interior Gateway Routing Protocol (IGRP) and Enhanced IGRP (EIGRP)
Open Shortest Path First (OSPF) Protocol
Border Gateway Protocol Version 4 (BGP4)
Hot Standby Router Protocol (HSRP)
Protocol Independent Multicast (PIM)
Other advanced services
Note: For more information on SMI and EMI features, refer to the Catalyst 3550 Multilayer Switch Software Configuration Guide under the Catalyst 3550 Multilayer Switches release notes for your version of 3550 software.
Note: All Catalyst 3550 Gigabit Ethernet switches ship with an EMI installation. Catalyst 3550 Fast Ethernet switches ship with either an SMI or EMI installation. You can order the Enhanced Multilayer Software Image Upgrade kit (CD-3550-EMI=) in order to upgrade any Catalyst 3550 Fast Ethernet switch from the SMI to the EMI. However, unless you purchased your 3550 with an EMI image preinstallation, you must purchase the upgrade kit before you download the EMI image.
Issue the show version command in order to verify these items:
The version of software that you run
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The location of the image installation
The feature set that you run
The 3550 model that you have
Here is a sample command output:
Understand the 3550 Flash File System and Memory Requirements
3550 Flash File System
The 3550 ships from the factory with the installation of a CMS image (.tar file) in the flash: directory. The extraction process that takes place with a .tar file creates a Cisco IOS image directory. The image directory has the same name as the Cisco IOS image (.bin file), but without the file extension. This directory stores the Cisco IOS image (.bin file) along with an HTML subdirectory that contains the CMS files.
Issue the dir flash: command in order to view the 3550 Flash file system. Here is a sample command output:
Tracer dmg. If you use just the Cisco IOS image to upgrade, you issue the copy tftp command. The Step-by-Step Procedure for the 3550 with Use of Only the Cisco IOS Image (.bin File) section of this document fully explains this process.
If you upgrade with use of the CMS image (.tar file), you issue the archive download-sw command. The Step-by-Step Procedure for the 3550 with Use of the CMS Image (.tar File) section of this document fully explains this process.
3550 Memory Requirements
DRAM Memory
The synchronous DRAM (SDRAM) configuration on all 3550 switches is 64 MB. There are no minimum DRAM requirements to consider before you upgrade software on the 3550.
Flash Memory
All 3550s have 16 MB of internal Flash memory. The Flash memory is not upgradeable.
There is a limit to the number of images that you can store in Flash. Always check the size, in bytes, of the image in the LAN Switches section of Downloads - Switches (registered customers only) before you upgrade software. Issue the dir flash: command in order to compare the size of this image with the free space in Flash. Here is a sample command output:
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If necessary, issue the delete flash: file_name command in order to delete a single Cisco IOS image (.bin file). Or issue the delete /force /recursive command in order to delete a directory and all the files in the directory.
In order to upgrade with use of a CMS image (.tar file), use the archive download-sw command. This command has a few options. One option is the archive download-sw /overwrite command, which overwrites or replaces the old software. Another option is the archive download-sw /leave-old-sw command. This command leaves the old software, but requires more Flash space.
The Software Upgrade Procedure for the 3550 Series Switches section of this document covers in detail the use of the delete command and the archive download-sw command.
Configuration Register Changes and the Set of Boot Statements
Unlike some other Catalyst switches, there is no config-register command on the 3550. You cannot change the configuration register value from the default.
The 3550 automatically searches for a valid software image from which to boot. The search occurs even if you do not set a boot system statement. Set the boot statement anyway, as a precaution. The command to set a boot system statement is boot system flash: file_name.
You can specify multiple images in the boot statement if you separate the image names with a semicolon. The command is boot system flash: file1;file2.
If you use a CMS image on the 3550, the Cisco IOS image (.bin file) extraction creates a directory for the image alone. The boot system command becomes boot system flash: directory/file_name.
The Software Upgrade Procedure for the 3550 Series Switches section of this document covers in detail the use of the boot system command.
Download Software Image
You must download the 3550 software image onto the PC that acts as the TFTP server prior to the actual image upgrade. Download the software image from the LAN Switches section of Downloads - Switches (registered customers only) . In order to download the software image, you must be a registered user and you must log in. If you do not understand which image to download, see the Prepare to Upgrade section of this document.
Install TFTP Server
The sample output in this document uses a third-party TFTP server with installation on a PC that runs Microsoft Windows 2000 Professional. You can use any TFTP server with installation on any platform. You do not need to use a PC with a Windows OS.
Download and install any shareware TFTP software from the Internet on the PC that you want to use to copy the 3550 software image to the switch.
The TFTP server root directory must be the directory to which you download the software image. You can download the images to the default root directory of the TFTP server. Or, you can change the root directory path to the directory that stores the software image.
In order to access the switch CLI, connect a console cable between the switch console port and the PC.
Refer to Connecting a Terminal to the Console Port on Catalyst Switches. The document explains how to access the CLI with the hyperterminal.
Note: You can upgrade the switch with remote Telnet access. However, when you reload the switch during the software upgrade, you lose Telnet connectivity. After you load the new image, you can reestablish the Telnet. However, to troubleshoot in the case of failure, you must have local console access. A switch upgrade with use of console access is best.
Configure a VLAN interface on the switch to be in the same VLAN, or subnet, as your TFTP server with direct connection.
This configuration provides the best results.
If you cannot directly connect your TFTP server to the switch, issue either the ip default-gateway command or the ip route command. These commands set a default gateway to reach the TFTP server.
On the 3550, you can configure a VLAN interface with an IP address and with L2 physical interfaces as members of that VLAN. Alternately, you can configure a physical interface as an L3 interface with its own IP address. This configuration is similar to a router configuration.
This example uses a VLAN interface with a Fast Ethernet L2 physical interface in that VLAN. The 3550 and TFTP server are not in the same subnet, so you configure a default route.
Backup Configuration and Software Image
Perform a backup of the switch configuration to the PC that runs the TFTP server. Lou reed. If you lose the switch configuration for any reason, you can always restore the configuration from the TFTP server.
Issue the copy startup-config tftp command on the 3550 in order to back up your current configuration to a TFTP server. Here is a sample command output:
Software Upgrade Procedure for 3550 Series Switches
There are two upgrade procedures available for the 3550:
If you want to use the CLI only and do not intend to use the CMS software, complete the Step-by-Step Procedure for the 3550 with Use of Only the Cisco IOS Image (.bin File).
If you want to use the latest version of CMS software, complete the Step-by-Step Procedure for the 3550 with Use of the CMS Image (.tar File).
Step-by-Step Procedure for the 3550 with Use of Only the Cisco IOS Image (.bin File)
In this example, you upgrade the software on a 3550 from Cisco IOS Software Release 12.1(12c)EA1 to Cisco IOS Software Release 12.1(13)EA1 with use of only the Cisco IOS image (.bin file). The procedure is the same despite the version of software that you use.
Issue the show version command in order to view the current version of software that you run.
Here is a sample command output:
From the LAN Switches section of Downloads - Switches (registered customers only) , choose Catalyst 3550 software and find the image that you want to download.
Note the size of the image in bytes. This example uses the file c3550-i5q3l2-mz.121-13.EA1.bin. The 'i5q3l2' at the start of the file name tells you that this image is an EMI. The image size is 3993612 bytes, or approximately 4 MB.
Note: The procedure is the same for the SMI. The SMI image has 'i9q3l2' at the start of the file name. The SMI image is smaller and takes up less room in Flash. If you still have questions about whether to use an SMI or EMI image, see the Understand 3550 Software Image Naming Conventions: SMI and EMI section of this document.
Download the image that you want.
Issue the dir flash: command on the 3550 in order to verify the amount of free memory that you have for the upgrade.
Here is a sample command output:
Note: If you already have enough room in Flash for the upgrade, proceed directly to Step 6.
Issue the delete command in order to remove the old Cisco IOS Software Release 12.1(9)EA1c image (.bin file).
This deletion frees up enough room for the upgrade. Here is a sample command output:
An upgrade can require you to free up even more space. The requirement depends on how many images you have stored in Flash. You can delete an old image directory to free up this space.
Note: Remember this storage location so that you can find the old Cisco IOS image (.bin file) as well as the files that you need for the CMS. If you do not use the web interface to manage the switch or you have a newer image directory, the storage location is not a problem.
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Issue the delete /force /recursive command in order to delete an image directory and all the subdirectories and files in the image directory. Here is a sample command output:
Issue the copy tftp flash: command in order to perform the upgrade.
Set a boot system statement so that the new image boots on the next reload.
Here is a sample command output: Install quicken deluxe 2018 for windows on a mac.
Issue the write memory command in order to save your changes, and reload the switch.
Here is a sample command output:
Issue the show version command in order to verify that you run the new image.
Here is a sample command output:
Step-by-Step Procedure for the 3550 with Use of the CMS Image (.tar File)
In this example, you upgrade the software on a 3550 from Cisco IOS Software Release 12.1(12c)EA1 to Cisco IOS Software Release 12.1(13)EA1 with use of the CMS image (.tar file).
Issue the show version command in order to view the current version of software that you run.
Here is a sample command output:
From the LAN Switches section of Downloads - Switches (registered customers only) , choose Catalyst 3550 software and find the image that you want to download.
Note the size of the image in bytes. This example uses the file c3550-i5q3l2-tar.121-13.EA1.tar. The 'i5q3l2' at the start of the file name tells you that this image is an EMI. The image size is 6011904 bytes, or approximately 6 MB.
Note: The procedure is the same for the SMI. The SMI image has 'i9q3l2' at the start of the file name. The SMI image is smaller and takes up less room in Flash. If you still have questions about whether to use an SMI or EMI image, see the Understand 3550 Software Image Naming Conventions: SMI and EMI section of this document.
Download the image that you want.
Issue the dir flash: command on the 3550 in order to verify the amount of free memory that you have for the upgrade.
Here is a sample command output:
Note: If you already have enough room in Flash for the upgrade, proceed directly to Step 6 .
To free up memory on the 3550, choose one of these options:
Overwrite or replace the software.
Choose this option if you do not want to keep your current version. Proceed to Step 6.
Manually delete an older image or directory.
Choose this option if you want to keep your current version of software as a backup.
Issue the delete command in order to remove an old Cisco IOS image or directory and make room for the upgrade. Here is a sample command output:
The upgrade installs the Cisco IOS image (.bin file) and the CMS files in the image directory on a 3550. The image directory has the Cisco IOS image name, with the exclusion of the .bin extension. Here is a sample command output:
Issue the delete /force /recursive command in order to delete an image directory and all the files in the image directory. Here is a sample command output:
Issue the archive download-sw command in order to copy over the .tar file and extract all the files inside the .tar file.
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There are two options to consider with this command:
/leave-old-sw
If you choose to leave the current version of software as a backup, the command syntax is archive download-sw /leave-old-sw tftp://tftp_server_ip/file_name. As Step 5 discusses, be sure that you have enough space in Flash to use this option.
/overwrite
If you choose to overwrite or replace the current version of software with the newer version, the command syntax is archive download-sw /overwrite tftp://tftp_server_ip/file_name. This document uses this overwrite option.
The upgrade procedure is exactly the same despite the option you choose, but the results differ.
Note: There are additional options that this document does not cover. For details, refer to Working with the IOS File System, Configuration Files, and Software Images for your release of 3550 software.
Issue the dir flash: command. Here is a sample command output:
Issue the archive download-sw command with the /overwrite option. The command replaces the current software version, Cisco IOS Software Release 12.1(12c)EA1, with the later version, Cisco IOS Software Release 12.1(13)EA1. Here is a sample command output:
Confirm that the archive download-sw command with the /overwrite option automatically configures a boot system statement.
With a boot system statement, the new image boots on the next reload of the switch. In order to confirm the configuration of a boot system statement, issue the show boot command.
Here is a sample command output:
If for some reason the configuration of the boot statement does not occur, you can configure the statement. Issue the boot system command.
Here is a sample command output:
Issue the write memory command in order to save your changes and reload the switch.
Here is a sample command output:
Issue the show version command in order to verify that you run the new image.
Here is a sample command output:
Verify
The Software Upgrade Procedure for 3550 Series Switches section of this document provides the commands necessary in order to verify that your configuration works properly.
Troubleshoot
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This section provides information you can use to troubleshoot your configuration.
Software Upgrade Fails, Switch: Prompt Displays, or Switch Reboots Continuously
Your software upgrade can fail for a number of reasons. For example, IP connectivity problems can exist between the switch and TFTP server, or you can have incorrectly set the boot statements. These issues can cause your switch to boot in the switch: mode. If your 3550 displays the switch: prompt or continuously reboots, refer to this document for software recovery procedures:
Switch Does Not Boot Automatically, Needs a Manual Boot at the ROMMON (switch: Prompt)
If you find that your switch does not boot automatically and needs a manual boot, refer to this document for manual boot at the ROMMON (switch: prompt):
The Switch Not Booting Automatically, Needs a Manual Boot at the ROMMON (switch: Prompt) section of the document Upgrading Software in Catalyst 2900XL and 3500XL Switches Using the Command Line Interface
You Receive the Error_Bad_Mzip Error Message
You see this error when the Cisco IOS image is corrupt or a .tar file uploads through an Xmodem. In order to resolve the issue, complete these steps:
Upload the .bin file to the switch through the Xmodem.
Set the boot path to the correct file name.
Reload the switch.
Check that the image file size is the correct one.
If the image file size is not correct, try to download the image file again.
Refer to these documents to check the recovery procedure:
The Recovering from Corrupted Software section of Troubleshooting
The Step-by-Step Recovery Procedure section of Recovering Catalyst Fixed Configuration Switches from a Corrupted or Missing Image
After the Upgrade the Switch Does not Boot and Moves to EMU Prompt
Cisco 3550 Switch Specifications
The prompt occurs due to corrupt software or some problem during the download.
In order to recover from the 'EMU>' prompt, complete these recovery steps:
Reload the switch, and then press the mode button in order to force the switch to ROMMON.
Perform the ROMMON recovery with the procedure in the Recover from ROMmon Mode section of Recover a Cisco IOS Catalyst 4500/4000 Series Switch from a Corrupt or Missing Image or in Rommon Mode.
Note: Xmodem recovery is not supported when the switch is in the 'EMU>' prompt. The only command that can be executed at the EMU prompt is dir flash:. If any other command is executed at the EMU prompt, the switch dispalys a no response from remote system message from the hyperterminal.
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