How to configure DNS for Cisco Routers and Switches

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How to configure DNS for Cisco Routers and
Switches

• http//www.router-switch.com/

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• Domain Name System (DNS) is a type of service
  that translates names into IP addresses for
  computers, services, or any resource connected to
  the Internet or a private network. This allows us
  to successfully find and connect to Internet
  websites and services no matter where they are.
  In many cases, where a local DNS server is not
  available, we are forced to either use our ISP's
  DNS servers or some public DNS server, however,
  this can sometimes prove troublesome.

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• In the Cisco world, you have the ability to
  configure multiple DNS Servers on a Cisco device
  running the Cisco Internetwork Operating System
  (Cisco IOS) to ease network management. Following
  the guide to configure a DNS server on a Cisco
  Router and/or Switch.

4

• Switch gt en
• Switch conf t
• Switch (config)no ip domain look
• Switch (config)user cisco pr 15 pass ccie
• Switch (config)ho SW1
• SW1(config)line con 0
• SW1(config-line)exec-tim 0 0
• SW1(config-line)logg syn
• SW1(config-line)exit
• SW1(config)line vty 0 4

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• SW1(config-line)login loc
• SW1(config-line)exec-tim 30 0
• SW1(config-line)exit
• SW1(config)interface vlan 1
• SW1(config-if)ip address 10.10.10.1
  255.255.255.0
• SW1(config-if)no shu
• SW1(config-if)exit
• SW1(config)ip name-server
• SW1(config)ip name-server 10.10.10.100
• SW1(config)end

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• This example can be applied to all Cisco
  switches, such as catalyst 3750 series switch,
  Cisco 3650 switch, Cisco 3850 switch, catalyst
  6500 series switch etc, all Cisco routers, like
  Cisco 1900, Cisco 2900 series routers, Cisco 3900
  routers, Cisco 1800, Cisco 2800 and Cisco 3800
  etc.

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