JUNOS Enterprise Switching

Advanced CLI and Other Cool Stuff

There are lots of other fantastic configuration options that can be used, and an explanation of all of them would require another book. The JUNOS documentation contains many timesaving tips, and JUNOS Cookbook by Aviva Garrett (O’Reilly) is a great resource, too. To whet your appetite, here are three JUNOS software CLI tips.

SOS

If JUNOS is causing you problems, just ask it for help. You can do this in a few ways. Most people are instinctively aware of the option to use the question mark (?) to display possible command completions:

[edit]
lab@Rum# set protocols rstp ?
Possible completions:
  <[Enter]>            Execute this command
+ apply-groups         Groups from which to inherit configuration data
+ apply-groups-except  Don't inherit configuration data from these groups
  bridge-priority      Priority of the bridge (in increments of 4k - 0,4k,8k,..60k)
  disable              Disable STP
  forward-delay        Time spent in listening or learning state (4..30 seconds)
  hello-time           Time interval between configuration BPDUs (1..10 seconds)
> interface
  max-age              Maximum age of received protocol bpdu (6..40 seconds)
> traceoptions         Tracing options for debugging protocol operation
  |                    Pipe through a command
[edit]
lab@Rum# set protocols rstp

Note that the > character indicates a directory that contains subdirectories, and the + indicates a command that takes multiple arguments; no symbol means the command takes a single argument or is in fact the end statement of a command.

The help command is a secret resource ...