Recently, I have been working to upgrade Cisco network devices, mainly routers and switches, for a client. A recent network audit identified fragmentation in the IOSes and also security advisories. As a result, all the routers and switches required upgrades and it was a good opportunity for the client to standardize the IOSes for the different type of network devices in the environment.
IOS XE supported switches such as the 3850 and 3650 support two modes, Bundle mode and Install mode. New switches, by default, are shipped with install mode. If you never paid attention during an IOS XE upgrade on a switch you may have just copy the IOS XE image to flash and set the system boot variable to boot from the new IOS using the command below:
It’s officially spring and for a lot of us that means spring cleaning – the attic, garage, basement, or just all those papers off the desk in the office. While you’re cleaning and reorganizing your personal life it’s also a good idea to take a look at your network and make sure that is cleaned up too. Below is a list of our top 8 best practices for cleaning up your network and devices.
Upgrading Cisco software (IOS, IOS-XE, ASA code, etc.) can be a little daunting sometimes. For the most part, installations are straight forward, but there is usually a fair amount at stake. Ideally, your environment should be designed with high-availability in mind, allowing you to perform maintenance (and endure unplanned outages) without business impact. But that isn’t always financially possible, especially for remote sites and smaller branch offices. This makes things especially difficult for the engineers tasked with performing this maintenance remotely. Losing access to a device and watching your continuous ping not receive replies for 5, 10, 15 minutes or even longer sometimes is always taxing! That said, they almost always come back, usually just shortly after real panic starts to set in. While we can’t be 100% sure everything is going to work every time (we didn’t write the code or design the hardware), if we do our due diligence we can increase our chances of success.
It’s approaching 10pm on Friday night and you are getting ready to apply your IWAN / Routing Protocol / <Insert major project of your choosing> migration script to the very last of your branch site routers. You have been saving this branch till last for a very special reason. This is after all that branch site that is in the furthest darkest corner of the globe. Your company of course has no local IT resource there and even if they did its probably that site that you can only get to via 3-hour snowmobile ride. This is the site that has the potential to really ruin your weekend. But hey that’s why we left it until last right. We have applied our configurations to our other 10 sites without a hitch, you have this change down pat. At this rate, you might even make it to the bar in time celebrate your success with a couple of well-earned adult beverages.
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