Connecting J Series Hardware to Create a Chassis Cluster
To create a J Series chassis cluster, you must physically connect a pair of the same kind of supported J Series devices back-to-back over a pair of Gigabit Ethernet connections. The connection that serves as the control link must be the built-in interface ge-0/0/3. The fabric link connection can be a combination of any pair of Gigabit Ethernet interfaces on the devices.
![]() | Note: You can connect two fabric links between the two devices in the cluster to reduce the chance of fabric link failure. See Understanding Chassis Cluster Dual Fabric Links. |
Figure 102 shows two J Series devices connected using the built-in interfaces for both the fabric and control links.
Figure 102: Connecting J Series Devices in a Cluster (J6350 Devices)

![]() | Note: When chassis clustering is enabled on a J Series router, two interface ports are used to link the two devices: the ge-0/0/3 interface (fxp1 port) is used for the control interface and one port is used for the fabric link (using either one of the built-in interfaces (ge-0/0/0 or ge-0/0/1) or one of the ports of a uPIM). Also, the ge-0/0/2 interface (fxp0 port) is used for the management link. This means that three of the four onboard Gigabit Ethernet ports are in use; if additional ports are required for transit traffic, then a PIM or uPIM is required. |
Related Topics
- Junos OS Feature Support Reference for SRX Series and J Series Devices
- Understanding What Happens When Chassis Cluster Is Enabled
- J Series Chassis Cluster Configuration Overview
- Example: Setting the Chassis Cluster Node ID and Cluster ID (CLI)
- Example: Configuring the Chassis Cluster Management Interface (CLI)
- Example: Configuring the Number of Redundant Ethernet Interfaces in a Chassis Cluster (CLI)
- Verifying a Chassis Cluster Configuration
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