This article provides links to the Resolution Guides and articles for troubleshooting problems on a Physical Interface, an Aggregated Ethernet Interface (LAG), and an IRB (called VLAN interface on Legacy platforms) interface on a Juniper Networks EX or QFX Series switch.
Verify that the Interface on an EX or a QFX Series switch is up and troubleshoot it if it is not.
Click a topic link to view configuration and troubleshooting information:
Troubleshoot/Verify Physical Interface
Troubleshoot/Verify IRB or VLAN Interface
KB22220 - Resolution Guide - EX - Troubleshoot VLAN interface [juniper.net]
Troubleshoot/Verify Aggregated Ethernet Interface (LAG)
2022-06-22 - Updated links and terminology; included support for QFX devices