Understanding Management Interfaces
You use management interfaces to access devices remotely. Typically, a management interface is not connected to the in-band network, but is connected to a device in the internal network. Through a management interface, you can access the device over the network using utilities such as ssh and telnet and configure it from anywhere, regardless of its physical location. As a security feature, users cannot log in as root through a management interface. To access the device as root, you must use the console port.
 | Note: Juniper Networks does not support configuring two management interfaces in the same subnet. |
Management interface port ranges vary based on device type:
- QFX3500 devices:
The valid port range for a management interface (me) on a QFX3500 device is between 0 and 6, with a total of seven available ports. However, you can only configure me0 and me1 as management interfaces. The management interfaces are labeled C0 and C1, and they correspond to me0 and me1.
- QFX3600 devices:
There are two RJ-45 management interfaces (labeled C0 and C1) and two SFP management interfaces (labeled C0S and C1S). On a QFX3600 standalone switch, the RJ-45 management interfaces and SFP management interfaces correspond to me5 and me6. On a QFX3600 Node device, the RJ-45 management interfaces and SFP management interfaces correspond to me0 and me1.
Note: On a QFX3600 device, you can use either the RJ-45 or the SFP management interfaces, but not both at the same time.
Note: Before you can use the management interfaces on either the QFX3500 device or QFX3600 device, you must configure the logical interfaces with valid IP addresses. Juniper Networks does not support configuring two management interfaces in the same subnet.
- QFabric system:
On a QFabric system, there are management interfaces on the Node devices, Interconnect devices, and Director devices. However, you cannot access the management interfaces on the Node devices or Interconnect devices directly. You can only manage and configure these devices using the Director device. You can connect to the management interface over the network using utilities such as SSH.
