Chapter 2 JunOS user interface

Question 1

Default access configuration

Answer 1

By default just console access is enabled with root user without any password

Question 2

Mgmt interfaces

Answer 2

• fxp0 -> standard mgmt
• em0 -> mgmt oob

Question 3

Configure vs configure private vs configure exclusive

Answer 3

Configure: just one candidate config for all users, commit commits all
changes of the user configuring
Configure private: creates a candidate config for each user, once a
user commit the system assure there are no other
changes in progress otherwise it needs to wait for
them, in case of conflicting configurations the 1
commit take precedence
Configure exclusive: a user blocks changes from other users, other
users can’t commit the configuration, you can
force a logout with request system logout

Question 4

Commit process

Answer 4

once commited the candidate overwrite the active conf and rollback files shift while the last one gets deleted.

Question 5

rollback config file stored

Answer 5

first 3 are stored in /config in the flas
other are stored in /var/config in the ssd

Question 6

help commands

Answer 6

help topic <comm> -> documentation of the command
help reference <comm> -> syntax detail of the command</comm></comm>

Question 7

Merge configuration

Answer 7

JunOS allow to create files with configuration changes and merge them to the candidate config.
load merge <file> -> always executed from top menu
load merge <file> relativa -> execute the merge from the submenu you're in</file></file>

Question 8

Override configuration

Answer 8

Allow to load a file in the candidate overriding in case of duplicates object
load override <file_name> -> always executed from top menu
load override <file_name> relative -> execute the merge from the submenu you're in</file_name></file_name>

Question 9

Useful commands