Reply To: juniper ex3400 series switches configuration

The EX3400 series switches, part of Juniper’s EX series, are configured using the Junos OS CLI. Common configuration tasks include setting the hostname, IP address for the management interface, default gateway, and enabling SSH. The switch also supports Zero Touch Provisioning (ZTP), which can be disabled during initial configuration. The factory-default configuration varies by model and can be reverted to. [1, 2]
Here’s a breakdown of common configuration steps and commands:
Initial Setup and Console Access:

• Console Connection: Connect to the switch using the RJ-45 or Mini-USB console port.
• Console Settings: Ensure your terminal emulator is configured with the correct serial settings (9600 baud rate, no flow control, etc.).
• Login: Log in to the switch using the “root” user, typically without a password.
• Enter Configuration Mode: Use the configure command to enter the configuration mode. [1, 1, 3, 3]

Basic Configuration Commands (Examples):

• Hostname: set system host-name <hostname> [1, 1, 4]
• IP Address: set interfaces <*> unit 0 family inet address <ip-address>/<prefix-length> [1, 1, 4, 4, 5, 6]
• Default Gateway: set routing-options static route 0.0.0.0/0 next-hop <gateway-ip> [1, 1, 7]
• SSH: set system services ssh [1, 1]

Other Important Considerations:

• Virtual Chassis: EX3400 switches can be interconnected to form a Virtual Chassis, allowing them to be managed as a single logical device. [8, 8]
• PoE: The EX3400 switches support Power over Ethernet (PoE), which can be configured on the appropriate interfaces. [2, 2, 9, 9]
• Licensing: Flex licensing allows unlocking additional features, with different tiers available. [10, 10]
• Juniper Mist: The EX3400 can be integrated with Juniper Mist cloud for enhanced management and automation. [11, 11, 12, 12]
• ZTP: Zero Touch Provisioning can be disabled during initial setup if not needed. [1, 1, 13]
• Commit: Use the commit command to apply the configuration changes. [1, 1]

[1] https://www.juniper.net/documentation/us/en/quick-start/ex3400/id-step-2-up-and-running.html[2] https://www.juniper.net/documentation/us/en/hardware/ex3400/topics/topic-map/ex3400-configuring-junos-os.html[3] https://www.juniper.net/documentation/us/en/hardware/ex3400/topics/topic-map/ex3400-connecting-to-management-device.html[4] https://www.juniper.net/documentation/us/en/quick-start/ex3400/ex3400-day-one-plus.pdf[5] https://device.report/manual/9966730[6] https://itman.ae/2024/09/09/essential-cisco-switch-commands/[7] https://www.scribd.com/document/363853171/Configuring-the-SRX300-Services-Gateway-Using-the-CLI[8] https://www.juniper.net/documentation/us/en/hardware/ex3400/ex3400.pdf[9] https://www.juniper.net/documentation/us/en/software/junos/poe/topics/topic-map/poe-ex-series-configuring.html[10] https://www.juniper.net/content/dam/www/assets/datasheets/us/en/switches/ex3400-ethernet-switch-datasheet.pdf[11] https://www.juniper.net/documentation/us/en/software/nce/nce-177-using-mist-with-ex-switches/nce-177-using-mist-with-ex-switches.pdf[12] https://manuals.plus/juniper-networks/ex3400-ethernet-switch-manual[13] https://www.juniper.net/documentation/us/en/quick-start/ex4100/topic-map/step-2-up-and-running.html
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