8/27/2018 0 Comments Cisco Usb Console Driver 3850Cisco products now come with USB ports that allow console access. Some time ago, ZDNet's wrote an innovative article for TechRepublic about. This week, I want to take that article a step further. Here's how I used my USB flash drive with my Cisco 871W router. A little background Before we get started, let's review some of the specifics you need to know about using USB flash and CF cards with Cisco routers. You can find much of this in George's article, but here's a recap: • Many of the newer 800, 1800, 2800, and 3800 series routers support USB Flash. 800 series routers don't support CF, but they do support USB flash. • The Cisco IOS can only read FAT-formatted flash drives. • The IOS may not recognize the proper size of your USB flash drive. However, it doesn't really matter — you have much more space with today's USB flash drives than you could ever use. • While using USB flash and CF cards are a great way to transfer data to and from a router, you obviously must have physical access to the router. • The USB ports on a router are usually USB 2.0, but check the specifications. • Some routers with certain IOS versions support. Ideally, USB flash can hold multiple copies of the Cisco IOS and multiple router configurations, and you can use it to easily move and copy those IOS files and configurations from router to router. And many times, when you're physically at the router, the copying process can take place several times faster than it would over a LAN or WAN. My experience I have a new 4-GB USB flash drive that I recently bought for about $40. I had used this drive on my Window Vista PC to back up and transport data. I wondered if I could easily copy or back up the Cisco IOS from my 871W onto another 871W without configuring network settings on the router, plugging it into the network, running a TFTP server on my PC, and copying the IOS over. I wanted to just plug in the USB drive and copy off the IOS, just as I would on my PC with any other file. I'll be honest: Like most techies out there, I abhor reading directions. I save that until something absolutely, positively doesn't work. Admittedly, I had only skimmed George's article, and it had been some time since I had done even that. (Yes, I confess: I didn't read it thoroughly until after this experiment.) So, like most new gadgets I try out for the first time, I just plugged it in to see what would happen. While on the console of my Cisco 871W, I took the USB flash drive from my pocket and connected it to the router. Immediately, the router told me this: *Aug 26 21:03:10.251:%USBFLASH-5-CHANGE: usbflash1 has been inserted! *Aug 26 21:03:10.275:%USBFLASH-4-FORMAT: usbflash1 contains unexpected values in partition table or boot sector. Device needs formatting before use! Actually, this was a pleasant surprise: At least, the router knew there was a USB flash drive connected, it knew it didn't work, and it knew why it didn't work. Later, I found out that the drive wouldn't work because of its NTFS format. As mentioned above, it needed a FAT format — the Cisco IOS only recognizes the FAT file system. As I already knew that I didn't need anything on this flash drive, I formatted the flash drive with the router. (I could have also formatted the flash drive with a PC as long as I specified the FAT file system.). Here's what it looked like: TechRepublic-Router# format? Flash: Filesystem to be formatted usbflash1: Filesystem to be formatted TechRepublic-Router# format usbflash1: Format operation may take a while. [confirm] Format operation will destroy all data in 'usbflash1:'. [confirm] Format: Drive communication & 1st Sector Write OK. Format: All system sectors written. Format: Total data sectors in formatted partition: 8191435 Format: Total data bytes in formatted partition: -100952576 Format: Operation completed successfully. Format of usbflash1 complete TechRepublic-Router# At this point, as you can see below, I had a working USB flash drive. TechRepublic-Router# dir usbflash1: Directory of usbflash1:/ No files in directory No space information available TechRepublic-Router# Next, I copied my 871W IOS from the internal flash and to the USB flash. Here's what it looked like: TechRepublic-Router# dir Directory of flash:/ 2 -rwx 17227284 Aug 8 2006 17:16:53 +00:00 c870-advipservicesk9-mz.124-11.T2.bin 3 -rwx 3053 Aug 26 2006 20:24:58 +00:00 SDM_Backup 23482368 bytes total (6246400 bytes free) TechRepublic-Router# copy c870-advipservicesk9-mz.124-11.T2.bin usb TechRepublic-Router# copy c870-advipservicesk9-mz.124-11.T2.bin usbflash1: Destination filename [c870-advipservicesk9-mz.124-11.T2.bin]? Copy in progress.CCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCCC (truncated) 17227284 bytes copied in 14.440 secs (1193025 bytes/sec) TechRepublic-Router# dir usbflash1: Directory of usbflash1:/ 1 -rw- 17227284 Aug 26 2006 21:07:00 +00:00 c870-advipservicesk9-mz.124-11.T2.bin No space information available TechRepublic-Router# At this point, I had my 17-MB Cisco IOS on my flash drive.
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