If you have mistyped a command in Cisco router, it will take few seconds for it to come back to the prompt. To avoid this costly lookup, disable ip domain lookup. From the enable mode, type "no ip domain lookup" will fix this error.
How to clear counters on a Cisco Router/Switch?
The counters can be cleared easily with the following command from the config mode. clear counters This will reset all counters to zero.
How to setup the speed and duplex setting on a Cisco router or switch?
How to Setup EIGRP Protocol on a Cisco Router?