Domain Lookup Packet Tracer

No ip domain lookup has always been a sloppy way of preventing your network devices from trying to telnet to incorrectly pasted commands. R7 config no ip domain lookup. So it does make sense sometimes to enable ip domain name to be used later on for ssh configuration and then put no ip domain lookup command to stop the router or switch from querying dns for typo.

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We disable this feature afterwards with no ip.

Domain lookup packet tracer. By default dns lookup is enabled on the cisco platform which causes delays in traceroutes and in a few other cases. The router attempts to resolve this unrecognized command as an ip address and takes awhile to do so. Now if we check show cdp neighbors on r2 we see that r1 has a domain name appended to it. R2 config do show cdp neighbor capability codes.

To disable domain lookup in cisco router translating xxxxxx domain server 255 255 255 255 in packet tracer router simply we can abort the domain lookup by. R1 writte translating writte unknown command or computer name or unable to find computer address r1 post navigation exec timeout command. Ip domain lookup now if i mistype a command the router will not perform a dns resolution process. They just want to eliminate the message on the console.

The better solution like juergen mentioned is to use transport preferred none this means that your device will not try to telnet by default unless you use the telnet command. The dns is also popularly called the. But if we look a bit more deeply the original post is indicating that they need the name resolution. The internet and several other large and private networks make use of the dns or the domain name system to direct the traffic online.

Router config ip domain lookup example in this example command that doesn t exist is accidentally typed in. Whois domain names and everything related what is a domain name and how does it work. If domain lookup is disabled then the message about translating would certainly not be generated.

Hi peter it s really a great explanation but i think we still need to configure ip domain name command in case that we need to enable ssh on the switch router. Router config no ip domain lookup. Ctrl shift 6 to disable the domain lookup should be on config mode. You can simply disable it using the command.