This topic applies to multiple hardware devices in the EX Series product family, which includes switches and the XRE200 External Routing Engine.
You can monitor and manage these devices using a dedicated management channel. Each device has a management port with an RJ-45 connector for out-of-band management. Use the management port to connect the EX Series switch or external Routing Engine to the management device.
Ensure that you have an Ethernet cable with an RJ-45 connector available. One such cable is provided with the device. Figure 1 shows the RJ-45 connector of the Ethernet cable supplied with the device.
Figure 1: Ethernet Cable Connector

To connect a device to a network for out-of-band management (see Figure 2):
For the location of the MGMT port on different devices:
Figure 2: Connecting an EX Series Switch to a Network for Out-of-Band Management
