Chapter 3 JunOS basic configuration

Question 1

Default configuration on all models

Answer 1

Remote access disabled
Root authentication without password
Syslog enabled

Question 2

Reset config

Answer 2

Load system default-configuration -> loads the default conf
Request system zeroize -> delete every command on the config

Question 3

Local users

Answer 3

Local users are configure with their local password and are parts of groups that define their privileges, there are some default configured groups

Question 4

Logging

Answer 4

Logs are stored in /var/log in different files like “messages”
To view its content “show log messages”
To view the logs in realtime “monitor start messages”

Question 5

Interface types

Answer 5

IFD -> Physical interface (g0/0/0)
IFL -> Logical interface (Unit 0)
IFF -> Family interface (Ipv4 or IPv6) these can be just 2 for each logical interface
Managemente interfaces -> me0, fxp0, vme
Internal -> fxp1, fxp2, bme
Loopback -> Lo0 can be only 1 per RI

Question 6

Trace options

Answer 6

Trace options are debugs, to enable them:
- Set the hierarchy
- Set the flags -> parameters you want to debug
- Set the file -> on which the results will be stored
- show <file_name> -> to get the results</file_name>

Question 7

NTP behaviour

Answer 7

When configuring an NTP server JunOS doesn’t take its time if it’s much different.
To make the switch take whatever time the NTP server has the NTP server needs to be configured as boot-server