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Router Configuration Update Methods and Modes

Learn to update router configuration files with current and prior versions using various methods and modes. Configure specific interfaces, apply passwords, and set up router identification for efficient network management.

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Router Configuration Update Methods and Modes

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  1. Chap 6Router Configuration I Andres, Wen-Yuan Liao Department of Computer Science and Engineering De Lin Institute of Technology andres@dlit.edu.tw http://www.cse.dlit.edu.tw/~andres

  2. Overview • Use router modes and configuration methods to update a router's configuration file with current and prior versions

  3. Router Configuration Files • Configuration file information • 11.x configuration files • 11.0 configuration files • copy running-config tftp and copy tftp running-config • Use NVRAM with Release 11.x • Use NVRAM with Pre-11.0

  4. Router conf. file information • Conf. files can come from the console, NVRAM, or TFTP server • The conf. file contains commands to customize router operation

  5. 11.x configuration files • Use the privileged EXEC configure command to configure • From a virtual (remote) terminal, a modem connection, or a console terminal • Load a conf. from a TFTP server

  6. Using TFTP Server • The network configuration file:apply to all routers and terminal servers on the network • The host configuration file: apply to one router

  7. Router Configuration Modes • Using router conf. modes • Global configuration modes • Configuring routing protocols • Interface confi. commands • Configuring a specific interface

  8. Use router conf. modes • User mode • Subset of the EXEC commands • Privileged mode • Global configuration mode and specific configuration modes

  9. Use router conf. modes • If you typeexit, the router will back out one level • Ctrl-Z leaves conf. mode completely and returns the router to privileged EXEC mode

  10. Configure a specific interface • On serial links • One side(DCE) • Provide a clocking signal • The other side (DTE) • By default, Cisco routers are DTE devices, but they can be used as DCE devices

  11. Configure a specific interface • If you are using an interface to provide clocking, you must specify a rate with the clockrate command • The bandwidth command overrides the default bandwidth

  12. Two connections on Ethernet interfaces: an attachment unit interface (AUI) connector a 10BASE-T connector

  13. Configuration Methods • 11.x configuration methods • 11.0 configuration methods • Password conf. methods • Router identification conf.

  14. Password configuration methods • Password can be established both on individual lines and in the privileged EXEC mode • line console 0 -- the console terminal • line vty 0 4 -- Telnet sessions

  15. Password configuration methods • enable password -- restricts access to privileged EXEC mode • enable secret password -- uses a Cisco proprietary encryption process to alter the password character string

  16. Password configuration methods • service password-encryption • Further protect passwords from being displayed • This encryption algorithm does not match the Data Encryption Standard (DES)

  17. Router identification conf. • Name your router • The host name and is the name displayed by the system prompt • banner motd • A message-of-the-day banner to be displayed on all connected terminals

  18. Summary • Configuration files • The console, NVRAM, or TFTP server • Privileged mode • Global configuration mode • Other configuration modes • Host name/ banner/interface descriptions

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