Juniper commands

Built-in command parsers for Juniper Networks devices (Junos OS). Covers both standard Juniper routers and EX-series switches.

Moler provides command support for two Juniper device families:

• moler.cmd.juniper — Junos CLI and configuration mode commands for Juniper routers.
• moler.cmd.juniper_ex — Commands for Juniper EX-series switches (extends the router module).

All commands inherit from GenericJuniperCommand (moler.cmd.juniper.genericjuniper), which itself extends CommandTextualGeneric.

Juniper commands are typically connection-changing: they transition between the CLI (> prompt) and configuration (# prompt) modes. They signal completion by detecting the target prompt rather than returning parsed data.

Command list

Juniper (router) — moler.cmd.juniper

Class	Module	Shell command	Mode
Configure	moler.cmd.juniper.cli.configure	configure	CLI → configure
ExitConfigure	moler.cmd.juniper.configure.exit_configure	exit	configure → CLI
GenericJuniperCommand	moler.cmd.juniper.genericjuniper	(abstract base)	—

Juniper EX (switch) — moler.cmd.juniper_ex

Class	Module	Shell command	Mode
GenericJuniperExCommand	moler.cmd.juniper_ex.genericjuniperex	(abstract base)	—

Detailed reference

Configure — moler.cmd.juniper.cli.configure

Switches the Juniper device from CLI mode to configuration mode by sending the configure command and waiting for the configuration-mode prompt.

connection · object · required

Moler connection to the Juniper device.

prompt · str

Regex for the starting CLI prompt. Defaults to generic detection.

expected_prompt · str

Regex for the target configuration-mode prompt. Default r'^admin@switch#'.

newline_chars · list

Characters used to split output lines.

target_newline · str

Newline characters for the remote system. Default "\r\n".

runner · object

Runner used to execute the command.

Return value

Returns {} when the expected configuration-mode prompt is detected. ret_required is False.

from moler.cmd.juniper.cli.configure import Configure

cmd = Configure(
    connection=conn,
    expected_prompt=r'^admin@switch#',
)
cmd()
# Device is now in: [edit] admin@switch#

---

ExitConfigure — moler.cmd.juniper.configure.exit_configure

Exits Juniper configuration mode by sending exit and waiting for the CLI-mode prompt.

connection · object · required

Moler connection to the Juniper device.

prompt · str

Regex for the starting configuration-mode prompt.

expected_prompt · str

Regex for the target CLI-mode prompt. Default r'^admin@switch>'.

target_newline · str

Newline characters for the remote system. Default "\r\n".

Return value

Returns {} when the expected CLI-mode prompt is detected.

from moler.cmd.juniper.configure.exit_configure import ExitConfigure

cmd = ExitConfigure(
    connection=conn,
    expected_prompt=r'^admin@switch>',
)
cmd()
# Device is now in CLI mode: admin@switch>

Typical Juniper workflow

A typical test sequence enters configuration mode, applies changes, then returns to CLI mode:

from moler.cmd.juniper.cli.configure import Configure
from moler.cmd.juniper.configure.exit_configure import ExitConfigure
from moler.cmd.unix.enter import Enter  # to send raw commands

# 1. Enter configuration mode
enter_cfg = Configure(
    connection=conn,
    expected_prompt=r'^admin@switch#',
)
enter_cfg()

# 2. Apply a configuration change (send raw command lines)
raw = Enter(connection=conn)
raw(command_string="set interfaces ge-0/0/0 description 'uplink'")
raw(command_string="commit")

# 3. Exit configuration mode
exit_cfg = ExitConfigure(
    connection=conn,
    expected_prompt=r'^admin@switch>',
)
exit_cfg()

Base classes

GenericJuniperCommand — moler.cmd.juniper.genericjuniper

Abstract base for all Juniper router commands. Accepts connection, prompt, newline_chars, and runner. Inherits all textual parsing infrastructure from CommandTextualGeneric.

GenericJuniperExCommand — moler.cmd.juniper_ex.genericjuniperex

Abstract base for Juniper EX-series switch commands. Extends GenericJuniperCommand with EX-specific defaults.

Juniper EX commands reuse the same prompt-detection mechanism as standard Juniper commands. Instantiate with the appropriate expected_prompt for your switch’s configured prompt.