Discussion

1.4 Displaying the Commands to Recreate
a Configuration
Problem
You have a copy of a JUNOS router configuration or you need to duplicate a router
configuration on another router and you want to know the commands to use to create
the configuration.
Solution
Use the following command to list the commands for creating a configuration:
[edit]
aviva@RouterA# show | display set
Discussion
The show | display set command is a handy way to reverse-engineer a router configuration
when you are trying to duplicate portions of a configuration on many routers
or when you need to write up configuration, monitoring, or troubleshooting
procedures for your network operations staff. This command is especially useful if
the configuration is complex and when setting it up involves many long commands
and lots of typing.
When you pipe the output of the configuration mode show command into the
display set command, the JUNOS CLI prints a list of the commands you need to
issue from that hierarchy level to create the existing configuration. When you use the
command at the top level of the configuration (at the [edit] level), the CLI shows all
the commands necessary to configure the router, which for most routers is a lot of
commands. By way of illustration, here’s a sample of the output for four interfaces
on the router from the [edit interfaces] level:
[edit interfaces]
aviva@RouterA# show | display set
set interfaces fe-0/0/1 unit 0 family inet address 10.0.15.2/24
set interfaces se-0/0/2 unit 0 family inet address 10.0.21.1/24
set interfaces se-0/0/3 serial-options clocking-mode dce
set interfaces se-0/0/3 unit 0 family inet address 10.0.16.1/24
set interfaces lo0 unit 0 family inet address 192.168.13.1/32
You can cut and paste these commands individually or all at once. They produce the
following configuration:
[edit interfaces]
aviva@RouterA# show
fe-0/0/1 {
unit 0 {
family inet {
address 10.0.15.2/24;
Displaying the Commands to Recreate a Configuration | 19
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