If you have a 3560X/3750X, you are in luck. bin you copied over or you can reset if you want the system to do a hard reset (similar to a power cycle). Once it’s done, you can either boot if you want run the. Don’t forget to make sure your xmodem is using xmodem-1k. This takes effect immediately and your terminal will now give you garbage until you set it’s rate to 115200 as well. To set your terminal speed to 115200, enter the command: switch: set BAUD 115200 That saves about 10 minutes at 115kbps and around 40 minutes at the snail’s pace of 9600bps.
Using xmodem-1k drops you to 19% overhead. Now you are well over 4 hours at 9600bps and closer to 45 minutes at 115000bps.
At least, that’s what it would be without overhead. For a 14MB IOS image, that takes your transfer time down from over 3 hours to around 30 minutes. The big one is to change your serial console speed from 9600bps to 115200bps.There are two things that can be done to make this go a bit faster. If you have an older switch, you get to transfer the IOS image to your switch with xmodem. So do the 3560X and 3750X, but I’ll get to that in a moment. The newer routers allow you to get the router onto the network and TFTP a new IOS in. You may have been to this movie before and been at the rommon of a newer router. Now you’re at the boot loader “switch:” prompt. If you’re smart, you don’t remove the old IOS, but in my case this was for a fresh deployment so I didn’t see the need to hang on to the old IOS. If you don’t grab the version with the web based device manager, you just have the IOS binary and you’re good to go, no install necessary. Let’s say you forgot to install the new IOS and now you’re at the boot loader because the tar file isn’t bootable, it’s just a container for the IOS bin and the web based device manager. Let’s say you have Cisco fixed switch (2960, 3560, etc) and you copied over the tar file with an IOS upgrade, removed the old IOS, and rebooted the switch.
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