Discussion

The show command displays the items in the configuration, starting at the current
hierarchy level. If you start at the [edit] level, you see the entire configuration:
[edit]
aviva@router1# show
version "7.4R1.7";
groups {
re0 {
system {
host-name router1;
}
interfaces {
fxp0 {
unit 0 {
family inet {
...
If you are at a lower level, you see just that portion of the configuration. The following
example starts in the OSPF portion of the configuration:
[edit protocols ospf]
aviva@router1# show
export export-statics;
area 0.0.0.0 {
interface fe-0/0/1.0;
interface fe-1/0/1.0;
}
Why are there curly braces here? The JUNOS software uses curly braces to represent
the structure of the configuration file, delineating related sections of configuration
parameters. If you are a C-language programmer, you will be very familiar with them.
The opposite of the set command is delete, which removes an item from the configuration.
You can delete an individual item from the configuration (such as delete
interface fe-1/0/1.0 from the OSPF configuration above), or you can delete an
entire section—here the area 0.0.0.0 section from the OSPF configuration:
[edit protocols ospf]
aviva@router1# delete area 0.0.0.0
aviva@router1# show
export export-statics;
Another time-saving command is run, which allows you to issue an operational command
from within configuration mode. For example, the run show route command
from configuration mode is the same as the show route command from operational
mode:
[edit]
aviva@router1# run show route