Cisco CISCO876-SEC-I-K9 Configuration Guide - Page 149

Chapter 14 Troubleshooting Software Upgrade Methods Table 14-3 debug atm packet Command Output Description (continued) Field VCD: 0xn VPI: 0xn DM: 0xn Length: n Description Virtual circuit associated with this packet, where n is some value. Virtual path identifier for this packet, where n is some value. Descriptor mode bits, where n is some value. Total length of the packet (in bytes) including the ATM headers. Software Upgrade Methods Several methods are available for upgrading software on the Cisco 850 and Cisco 870 series access routers, including: • Copy the new software image to flash memory over the LAN or WAN while the existing Cisco IOS software image is operating. • Copy the new software image to flash memory over the LAN while the boot image (ROM monitor) is operating. • Copy the new software image over the console port while in ROM monitor mode. • From ROM monitor mode, boot the router from a software image that is loaded on a TFTP server. To use this method, the TFTP server must be on the same LAN as the router. Recovering a Lost Password To recover a lost enable or lost enable-secret password: 1. Change the Configuration Register 2. Reset the Router 3. Reset the Password and Save Your Changes (for lost enable secret passwords only) 4. Reset the Configuration Register Value Note Recovering a lost password is only possible when you are connected to the router through the console port. These procedures cannot be performed through a Telnet session. Tip See the "Hot Tips" section on Cisco.com for additional information on replacing enable secret passwords. OL-5332-01 Cisco 850 Series and Cisco 870 Series Access Routers Software Configuration Guide 14-9