Today we will look for setting Cisco devices hostname and then disable domain lookup. The hostname is used to identify devices in a meaningful and easy way.

Change Hostname

First, we change the hostname to ismailbaydan.com and then fall back to default hostname which is Switch

S1#configure terminal
S1(config)#hostname ismailbaydan.com
ismailbaydan.com(config)#
ismailbaydan.com(config)#default hostname
Switch(config)#

Enable Domain Lookup

First, we enable domain lookup which is enabled by default and then disable domain-lookup

Switch(config)#ip domain-lookup
Switch(config)#no ip domain-lookup

We can check the current status of domain lookup by filtering running-config where a filter is “domain”. As you can see domain look up is disabled. Then we change to the default value and then filter again the running-config so there is no line about domain lookup which means it is enabled by default as we said before.

Print Hostname Configuration

Switch#show running-config | include domain
no ip domain-lookup
ip domain-name ismail
Switch(config)#default ip domain-lookup
Switch(config)#exit
Switch#show running-config | i domain
Switch#show running-config | i domain
ip domain-name ismail