IOS Primary Modes User EXEC Mode Privileged EXEC Mode Allows only a limited no. of basic monitoring commands Execution of configuration and management commands Doesn’t allow execution of any commands that might change the device’s configuration Debugging, Testing The entrance of the CLI The Higher Level Doesn't require Authentication By default, doesn't require authentication Identified by the prompt > Identified by the prompt #
Software Version, Bootstrap Version, System up-time, System restart info, Software image name, Router Type and Processor type, Memory type and allocation (Shared/Main), Software Features, Hardware Interfaces, Configuration Register
Other Show Commands Command Function show arp Displays the ARP table of the device show mac-address-table Displays the MAC table of a switch show startup-config Displays the saved configuration located in NVRAM show running-config Displays the contents of the currently running configuration file or the configuration for a specific interface, or map class information. show ip interfaces Displays IPv4 statistics for all interfaces on a router Show ip route Displays the next hop and checks its status
A Network Baseline is a Process that involves monitoring network performance and behavior over a certain period of time allowing for a point of reference when wanting to monitor performance in the future.
One method for starting a baseline is to copy and paste the results from an executed ping, trace, or other relevant command into a text file. These text files can be time stamped with the date and saved into an archive for later retrieval.
The importance of creating documentation cannot be emphasized enough. Verification of host-to-host connectivity, latency issues, and resolutions of identified problems can assist a network administrator in keeping a network running as efficiently as possible.