One of the pains about Cisco is that once you enter the configuration prompt, you can’t show the active configuration without leaving the configuration prompt. Juniper has had this ability for some time and in recent IOS codes, Cisco has finally caught up with the ‘Do’ command. For example:

RouterA#config t
Enter configuration commands, one per line. End with CNTL/Z.
RouterA(config)#interface vlan 5
RouterA(config-if)#do sho run interface vlan 6
Building configuration…

Current configuration : 98 bytes
!
interface Vlan6
description Conn To Core
ip address 10.10.10.1 255.255.255.252
end

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