Configuring Junos OS on the EX4650
EX4650 Switch Default Configuration
Each EX4650 switch is programmed with a factory default configuration that contains the values set for each configuration parameter when a switch is shipped. The default configuration file sets values for system parameters such as the system log and file messages.
When you commit changes to the configuration, a new configuration file is created that becomes the active configuration. You can always revert to the factory default configuration. See Reverting to the Factory-Default Configuration for the EX Series Switch.
A factory default configuration file of an EX4650 switch looks like this:
Connecting and Configuring an EX4650 Switch
The EX4650 switch is shipped with the Junos OS preinstalled and ready to be configured when the switch is powered on. There is a 64-MB internal NAND Flash memory device located on the baseboard for BIOS storage. You can insert the USB storage device into the USB slot on the front panel. EX4650 comes with a single SSD. There are two copies of the software: one on the SSD drive and one on a USB flash drive that can be inserted into the slot in the faceplate of the RE module.
When the switch boots, it first attempts to start the image on the SSD drive by default. If you wish to boot from the USB, you need to manually choose the option accordingly.
You configure the switch by issuing Junos OS command-line
interface (CLI) commands, either on a console device attached to the
console (CON
) port on the front panel, or over
a telnet connection to a network connected to the Ethernet management
(C0
or C1
) port on the front
panel.
Before you begin connecting and configuring an EX4650 switch, gather the following information:
Name the switch will use on the network
Domain name the switch will use
IP address and prefix length information for the Ethernet interface
IP address of a default switch
IP address of a DNS server
Password for the root user
This procedure connects the switch to the network, but does not enable it to forward traffic. For complete information about enabling the switch to forward traffic, including examples, see the Junos OS configuration guides.
To configure the software:
- Verify that the switch is powered on.
- Log in as the root user. There is no password.
- Start the CLI.root# cliroot@>
- Enter configuration mode.cli> configure[edit]root@#
- Set the root authentication password by entering either
a clear-text password, an encrypted password, or an SSH public key
string (DSA or RSA).[edit]root@# set system root-authentication plain-text-passwordNew password: passwordRetype new password: password
or
[edit]root@# set system root-authentication encrypted-password encrypted-passwordor
[edit]root@# set system root-authentication ssh-dsa public-keyor
[edit]root@# set system root-authentication ssh-rsa public-key - Configure the name of
the switch. If the name includes spaces, enclose the name in double
quotation marks (“ ”).[edit]root@# set system host-name host-name
- Create a user account.[edit]root@# set system login user user-name authentication plain-text-passwordNew password: passwordRetype new password: password
- Set the user account class to super-user.[edit]root@# set system login user user-name class super-user
- Configure the switch’s domain name.[edit]root@# set system domain-name domain-name
- Configure the IP address and prefix length for the switch’s
Ethernet interface.[edit]root@# set interfaces em0 unit 0 family inet address address/prefix-length
- Configure the IP address of a backup router, which is
used only while the routing protocol is not running.[edit]root@# set system backup-router address
- Configure the IP address of a DNS server.[edit]root@# set system name-server address
- (Optional) Configure the static routes to remote subnets
with access to the management port. Access to the management port
is limited to the local subnet. For more information about static
routes, see the Junos OS Administration Library.[edit]root@# set routing-options static route remote-subnet next-hop destination-IP retain no-readvertise
- Configure the telnet service at the [edit system
services] hierarchy level.[edit]root@# set system services telnet
- (Optional) Display the configuration to verify that it
is correct.[edit]root@# showsystem {host-name host-name;domain-name domain-name;root-authentication {authentication-method (password | public-key);}name-server {address;}}interfaces {em0 {unit 0 {family inet {address address/prefix-length;}}}}
- Commit the configuration
to activate it on the switch.[edit]root@# commit
- (Optional) Configure
additional properties by adding the necessary configuration statements.
Then commit the changes to activate them on the switch.[edit]root@switch# commit
- When you have finished configuring the switch, exit configuration
mode.[edit]root@switch# exitroot@switch>