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Configuring Network Devices

Configuring Network Devices. Working at a Small-to-Medium Business or ISP – Chapter 5. Objectives. Configure a router with an initial configuration. Use Cisco SDM to configure a Cisco ISR with LAN connectivity, Internet connectivity and NAT.

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Configuring Network Devices

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  1. Configuring Network Devices Working at a Small-to-Medium Business or ISP – Chapter 5

  2. Objectives • Configure a router with an initial configuration. • Use Cisco SDM to configure a Cisco ISR with LAN connectivity, Internet connectivity and NAT. • Configure a Cisco router for LAN connectivity, Internet connectivity and NAT using the Cisco IOS CLI. • Configure a WAN connection from customer premises to an ISP. • Describe, setup and configure a standalone LAN switch.

  3. Initial ISR Router Configuration • ISR combines routing, LAN switching, security, voice, and WAN connectivity features

  4. Initial ISR Router Configuration • Cisco IOS software modules are called images • IP Base image: entry-level Cisco IOS • Images are specific to models of devices

  5. Initial ISR Router Configuration • Tools and equipment required for setup:

  6. Initial ISR Router Configuration Three-stage bootup process: • Power-on self test (POST) • Locate and load Cisco IOS • Locate startup configuration file or enter setup mode

  7. Initial ISR Router Configuration Verifying and troubleshooting bootup process: • View output from the show version command • Use dir flash: and boot flash: in ROMmon mode • View boot system commands

  8. Initial ISR Router Configuration • Out-of-band management for initial configuration • In-band management over a network connection

  9. Initial ISR Router Configuration • Command Line Interface (CLI): text-based program • Security Device Manager (SDM): web-based GUI

  10. Using Cisco SDM Express and SDM • Follow best practices for installing a new device to ensure correct functions

  11. Using Cisco SDM Express and SDM Eight SDM Express configuration screens: • Overview • Basic configuration • LAN IP address • DHCP • Internet (WAN) • Firewall • Security settings • Summary

  12. Using Cisco SDM Express and SDM • Use Basic NAT Wizard to configure dynamic NAT with PAT

  13. Configuring a Router Using IOS CLI • CLI command modes: two levels of access

  14. Configuring a Router Using IOS CLI • Configuration modes can alter the operation of the device

  15. Configuring a Router Using IOS CLI Help features: • Command completion • Error indicators • Command history • Arrow and function keys

  16. Configuring a Router Using IOS CLI • Show commands display configuration and operation information

  17. Configuring a Router Using IOS CLI • Use Cisco IOS CLI to perform an initial router configuration

  18. Configuring a Router Using IOS CLI • Configure serial and Ethernet interfaces on a router

  19. Configuring a Router Using IOS CLI • Configure a default route for the Cisco router

  20. Configuring a Router Using IOS CLI • Configure a Cisco router to function as a DHCP server

  21. Configuring a Router Using IOS CLI • Configure static NAT on a Cisco router to enable Internet access for an internal server

  22. Configuring a Router Using IOS CLI • Back up and restore configuration files using a TFTP server

  23. Configuring a Router Using IOS CLI • Capture and save configuration file output from a terminal session

  24. Connecting the CPE to the ISP • Configuration checklists ensure that all configuration requirements are met

  25. Connecting the CPE to the ISP • Use inventory and configuration checklists and an installation plan to ensure successful installation

  26. Connecting the CPE to the ISP • Documentation includes diagrams, checklists, and activity logs

  27. Connecting the CPE to the ISP Types of customer connections over a WAN: • Point-to-point • Circuit-switched • Packet-switched

  28. Connecting the CPE to the ISP • Bandwidth and cost influence WAN choices

  29. Connecting the CPE to the ISP • Clock rate and serial encapsulation are needed when configuring serial WAN connections

  30. Initial Cisco 2960 Switch Configuration • Fixed-configuration, standalone devices • Configured using GUI or CLI

  31. Initial Cisco 2960 Switch Configuration • Check switch components • Connect cables to the switch • Power up the switch and observe POST

  32. Initial Cisco 2960 Switch Configuration • Switch settings can be configured using the Cisco IOS CLI • Assign an IP address to the default management virtual local area network, VLAN1

  33. Initial Cisco 2960 Switch Configuration • Connect the stand-alone LAN switch to the router and verify connectivity • Configure port security to prevent unauthorized use • Shut down unused ports

  34. Initial Cisco 2960 Switch Configuration • Cisco Discovery Protocol (CDP) gathers information about directly-connected Cisco network devices • Two Cisco devices directly connected on the same local network are called neighbors

  35. Summary • The Integrated Services Router (ISR) is a good choice for small to medium businesses and ISP-managed customers. • ISRs can be initially configured using SDM or the router IOS CLI. • When using the CLI, “show” commands verify configuration elements. • An installation plan can minimize disruption to a network when new devices are being added. • Documentation is necessary, both when configuring and when installing network devices. • Switches are assigned IP addresses by configuring them on the management interface, VLAN 1.

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