5 Magic Cisco IOS commands

1- ‘do’ in config mode
This is one of the most time saving ones that few people seem to know about, use it!
It lets you run exec commands in global configuration mode.

2- include, exclude and begin
-  Ever wanted to find something in the configuration? Or maybe you want to see some info, and not some?
Use include or exclude, for example you can do

          Router1(config)# do show running-config | include ip_address

-This will include every occurance of ‘ip address’ in your running configuration file, the underscore works for                  spaces, and as such you can also do

          Router1(config)# do show running-config | exclude password

          -This will exclude every line that has the word ‘password’ in it, can be usefull if you are listing the configuration             file to someone, or you can even do

         Router1(config)# do show running-config | exclude (password|secret)

        - This will exclude every line containing EITHER password or secret, and you can use regular expressions here.
This means that even

        show interfaces | include ( Vlan|Internet_address|packets\/sec)

        is valid, which will give you a list of your Vlan interfaces.

3- alias ps
-Use aliases, do you ever run the same commands a thousand times?
I have at least these aliases in place on all my equipment:

           alias exec sb show ip int brief
alias exec ps sh proc cpu | excl 0.00%__0.00%__0.00%

4- time-range command

time-range Workhours
periodic weekdays 8:00 to 16:00
!
ip access-list extended permit Permission-To-Internal-Server-In-Work-Hours
permit tcp any host 10.

0.0.5 eq www time-range Workhours
deny tcp any host 10.0.0.5 eq www
permit ip any any

This will allow access to 10.0.0.5 within 8am and 4pm

5- Redistribute default gateway route into OSPF
A lot of people are wondering about this one too.

       Router1(config-rtr)# default-information originate always

This is done under the ‘router ospf’ in global configuration.

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