The X is generally only required for modem connections. “The default escape key sequence is Ctrl-Shift-6 (Ctrl-^) or Ctrl-Shift-6, X (^^X). To set the escape character to Break, use the no or default form of this command.” “To define a system escape character, use the escape-character command in line configuration mode. This operating system is used to configure routing, switching, internetworking and other features supported by a Cisco device. IOS has a command-line interface with the predetermined number of multiple-word commands. To send an escape sequence over a Telnet connection, press Ctrl-Shift-6 twice.” IOS (Internetwork Operating System) is a multitasking operating system used on most Cisco routers and switches. Examples of processes from which you can escape include Domain-Name lookup, ping, trace, and Telnet sessions initiated from the device to which you are connected. The escape character is used for interrupting or aborting a process started by previously executed command. Next, we need to transfer the file from the TFTP server to the flash memory of the switch. We need to place the image file to a TFTP server that is reachable by the switch: 2.
CISCO IOS COMMAND UPGRADE
“The escape character (or key sequence) suspends any actively running processes and returns you to privileged EXEC mode or, if a menu is being used, to the system menu interface. Let’s upgrade Cisco Catalyst 2960 to a newer version of IOS via TFTP. That is the Control Key (hold down), the Shift Key (also hold down) and the "6" key - all at the same time. Is your traceroute responding with "* * *", or did you enter 1000000000 for the number of extended pings?Įasy - simply type CTRL-SHIFT-6 to break the process. 5 of 5 - 1 votes Thank you for rating this article.