On most routers, this flash memory can be easily replaced. I will use a Cisco IOS router in these examples. First, head over to Cisco. For example:. Above you can see the file name and MD5 checksum. The checksum can be used to check if the file that you downloaded is the same or has changed.
On my flash memory, there are a bunch of configuration files and the current IOS image. When we want to copy something to or from this router, we have to use the copy command:. I will use the following topology:. Make sure you select the correct directory where you downloaded your IOS image and if you have multiple network interfaces, select the correct interface. The copy command works in both directions.
I can copy to and from the TFTP server. When you use the copy flash: tftp: command, it will ask you for the IP address and filename. When you see something between  bracketsyou can just hit the enter button. For example, since I specified the source name, the router assumes I want to use the same file name for the destination.
Here is an example:. Above you can see that I already entered the IP address and filename. Once I hit enter, it will only ask me for the destination filename which I also could have entered. You only need one command to accomplish this:. The alias parameters lets you use a different name for the filename. Copying to or from an FTP server is also no problem, we can do this with the same copy command. One thing you might have to deal with is authentication.
Most FTP servers will require a username and password. Here is the topology I will use:. We can globally configure the username and password that we want to use for the FTP server.
When you use the copy command, Cisco IOS will use these values for authentication. This is a great method because of two reasons:. So far we copied a couple of files but how do we know that these files are valid?
We can verify this checksum on our router:.Setup and Stacking Cisco 3750X Switches
This MD5 checksum is the same as the one we found on the Cisco website. This tells us that we have the same file as Cisco published and that the file has not been tampered with. If the checksum fails, maybe someone has added something nasty to the image.
Which IOS image will it select when the router boots? Deleting the old IOS image is one option but there is another way.The switches include identical features except that the Cisco Catalyst E offers front-to-back cooling, and the Cisco Catalyst E-F offers back-to-front cooling.
The switches are designed to simplify data center architecture and operations by offering service provider-grade hardware and software in a one-rack-unit 1RU form factor optimized for full-featured top-of-rack ToR data center deployments Figure 1.
The Cisco Catalyst E and E-F build on the advanced technology of the Cisco Catalyst Switches, the most widely deployed ToR switch in the industry, with more than 10 million ports deployed worldwide. The Cisco Catalyst E and E-F double the uplink bandwidth and offer true front-to-back and back-to-front airflow with no side or top venting. The airflow direction is controlled by the changing of fans. Optional front-to-back and back-to-front airflow management reduces data center operating costs by providing strict hot-aisle and cold-aisle isolation.
Hot-aisle and cold-aisle deployment remains the widely adopted best practice for data center cabinet layouts today.
How to upgrade Cisco IOS Image
Networking switches and computing servers mounted in a single cabinet need to maintain the separation of the inlet cold air and the exhaust hot air for efficient use of cooling resources.
Historically, data center design engineers have had to trade off access-layer features such as QoS, network visibility, and security when moving from an end-of-row EoR to a ToR data center design. Data centers focused on the following applications should deploy smart ToR switches:.
Scripts can be programmed using a simple CLI. Cisco IOS EEM responds to real-time events to automate tasks or to take automatic action based on condition detection. Scripts can enable simple to complex automated actions, such as entering a log item or changing a port configuration in response to a security threat.
Cisco Catalyst 4948 Switch
The Cisco Catalyst E and E-F are optimized for multimedia applications, with advanced multicast support. Also supported are Internet Group Management Protocol IGMP snooping and Multicast Listener Discovery MLD snooping in hardware, enhancing performance and reducing network traffic by allowing a switch to dynamically add and remove hosts from a multicast group.
The Cisco Catalyst E and E-F offer superior per-port QoS features to help ensure that network traffic is classified, prioritized, and scheduled optimally to efficiently manage bandwidth-intensive multimedia and time-sensitive and mission-critical applications.
The Cisco Catalyst E and E-F can classify, monitor, and mark incoming packets, allowing the administrator to differentiate traffic flows and enforce policies. Sharing, shaping, and strict-priority configurations determine the scheduling of egress traffic. Table 1. Feature and Description.
Cisco Catalyst Switch. Cisco Catalyst 10 Gigabit Ethernet Switch. Cisco Catalyst M Switch. Dimensions H x W x D. Power redundancy. Unit weight. Hot-swappable fan. Average and maximum power consumption in watts [W]. Side to back.
Front to back Cisco Catalyst E. Back to front Cisco Catalyst E-F.Just as patching Windows is regular event so should be updating your networking equipment. New updates not only fix security holes and bugs but they often enable new features and deprecate others.
Keeping everything up to date also aids in keeping your environment standardized. Before we get to the steps I want to point out that there will be some variation in update steps between single switches and stack switches as well as between switches and routers.
Hopefully the steps below are close enough that you can extrapolate them to your specific type of hardware. To be completely honest, the additional flash steps below will be a little redundant since updating the master should update all member switches as well.
When the master comes up it will see a version mismatch and begin updating and reloading the members. For the purpose of demonstration, I wanted to do it the long way, which subsequently has a shorter downtime while the stack reloads. Before starting any upgrades, you need to establish your baseline. Verify the contents by running:. This will tell you what version currently exists in flash which may be helpful if you need to return this version because of problems with the new firmware.
This step is pretty self-explanatory. Space permitting, I like to update first and verify everything works before deleting the old firmware version from flash. To upload images I run a small tftp server on my workstation, set my workstation to an IP on the same network as my switch, and connect the workstation to a switchport via ethernet.
Take the extra minute and make sure the MD5 checksum of the uploaded file matches that given on the Cisco website to make sure the file integrity is good:.
First, we need to make sure that the config register is set to 0xF on, etc series switches or 0x on and other chassis switches. This will ensure the switch uses whatever image is specified in the config rather than booting the first on the flash. To do so run show ver and skip to the bottom to find current config register like so:. We need to save our changes to the config and reload the switch so it can load the latest firmware we copied to the flash.
Once your switch has fully booted up you need to make sure it actually loaded to the latest firmware. A quick show ver will tell you all you need to know:. Get Your Free Trial Here. Your email address will not be published. Skip to content. Tweet LinkedIn Share.Did you complete your upgrade?
Release Note for Catalyst 4948 Series Switch, Cisco IOS Release 12.2(54)SGx and 12.2(53)SGx
If so, how did it go, and were you able to do it without interruption? I'd like to go through the same process I'm at 3. Not yet mate, but planning to do in the coming weeks I've around 12 boxes and all have to be VSS enabled. Here's the link:. To be honest I couldn't find a way to upgrade both in one shot and thinking to upgrade them one by one. There is no way to perform an IOS upgrade without interrupting a service. There will be a downtime. My x are running in vss. The default config-register is 0x i thought the default is always 0x And changing it on active should be enough or do i have to do it on standby switch as well.
System image file is "flash1:unknown" ROM: However running config is showing. Is there any command to set the order? Are you done with the upgrades? No Leo I'm still waiting for my X boxes to be delivered on site. I've to go through the upgrade process in the coming weeks. Buy or Renew. Find A Community. We're here for you! Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.This document explains how to upgrade a Cisco IOS?
The examples provided from the and Series Routers also apply to the list of router platforms mentioned. In order to register for the Cisco. The information in this document was created from the devices in a specific lab environment. All of the devices used in this document started with a cleared default configuration.
If your network is live, make sure that you understand the potential impact of any command. Refer to the Cisco Technical Tips Conventions for more information on document conventions. The most commonly used protocol is TFTP.
Other protocols include ftp, http, https, scp, and rcp. If necessary, you can copy an image from one device to another. This section describes how to install a TFTP server, how to establish a console session with the router, and the router boot problems. After the application is installed, you must perform a minimal level of configuration. Download a TFTP server. Specify the outbound file directory.
This is the directory in which the Cisco IOS software images are stored. Most TFTP applications provide a setup routine in order to assist in these configuration tasks.
Even if it is possible to connect to the router through a Telnet session, Cisco recommends that you connect directly to the router through the console port because, if something goes wrong during the upgrade, you might need to be physically present next to the router to power-cycle it.
Moreover, the Telnet connection is lost while the router reboots during the upgrade procedure. A rolled cable, usually a flat black cable, connects the console port of the router to one of the COM ports of the PC.
If garbage characters appear in the HyperTerminal session, either you have not set the HyperTerminal properties properly or the config-register of the router is set to a non-standard value for which the console connection speed is higher than bps. In order to check the value of the config-register, issue the show version command.
The config-register values appears in the last line of the output. Verify that this value is set to 0x or 0x When you are sure that the console speed is set to bps on the router side, you should check the HyperTerminal properties. When you are connected to the console port of the router, you might notice that the router is either in ROMmon or Boot mode.
These two modes are used for recovery and diagnostic procedures.Use a console cable to connect to the switch. Please note that the steps given below will be similar to both switches and routers. However this examples shows how to upgrade ios image on a cisco catalyst switch.
After you login, go to enable mode, by entering the enable password. This example uses two cisco catalyst switches configured in stack mode as shown below. So, while upgrading you should upgrade the image on both the flash cards. Verify what version of IOS image your switch is currently running.
Most likely this will be same as the current IOS image file that you see in your flash card. Download the latest IOS image for your cisco website Go to cisco.
So, delete the current old image from the flash card. On a side note, you should be using some software to monitor your switch status. If you are not doing it install Nagios, and monitor your switches. If you are running a TFTPserver on your laptop, and connected to the switch using a console cable, assign a ip-address to your laptop, and put your laptop on the same network as the switch. This will ask you to enter the address of the remote host which is your laptop in this caseand the source filename that needs to be transferred which is the ISO image you downloaded from cisco website.
Just to make sure nothing went wrong during the copy, do a MD5 check-sum on this, and compare with the MD5 that you noted down from cisco website while downloading the IOS image.
Now it is time to tell switch cisco to use the new ISO image to boot from. Verify the current boot information, save the current configuration, and reboot the cisco switch as shown below. Finally verify the current IOS version of the switch, after the upgrade, it should display the new version as shown below.
Make sure to verify your interface and vlan status, to make sure everything is running properly without any issues. For step 4: If you downloaded a. Be aware that in this case the boot command will be: boot system switch all flash:cipbasek9-mz I think the engine messed up my archive command. Hi Ramesh, Thank you for your steps. I am trying to upgrade Cisco IOS on my Then tftp the new Cisco IOS over? I am not able to do that. Infact i loaded Or should I upgrade it from 35 to After Reload Switch took 40min to come up.
I am not able to verify IOS in 2nd flash of stack member. Actullay in stak it has to give verification of ios in all flashes. For step 5 if you are using an older IOS the commands do not work. Here is a sample command output of what did on a Issue the wr mem command to save your changes and reload the switch.
Here is a sample command output:.I copied the new IOS on the into the bootflash directory. There is two files, the original and the new img. It going to rommon mode. Go to Solution. Glen is exactly right here in that the boot statements you have look to be the cause of the problem.
You'll probably see a number of entries such as boot system bootflash:catipbasek9-mz. To remove those that you don't want you simply add the no keyword to the begining of each line that is not required.
You also need to change the configuration register, and then save the configuration. View solution in original post. What model of Catalyst do you have? If you've an older non E model then you'll not be able to use this IOS release. Dont know how come all 3 statements come. And also how to delete or change that bootvariable. Not at all.
The thanks should go to Glen as he spotted the error. It looks like you have three boot statements in there. Get rid of all of them except the one you want.
Buy or Renew. Find A Community. We're here for you! Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type. Showing results for. Search instead for. Did you mean:. The curent ios of switch is :- catipbase-mz. Labels: Other Switching. Everyone's tags 1.