Node Interfaces on Active SRX Series Chassis Clusters

Normally, on SRX Series devices, the built-in interfaces are numbered as follows:

Note: On SRX210, SRX220, SRX240, SRX550, and SRX650 devices, Layer 2 Ethernet switching is supported in chassis cluster mode.

For chassis clustering, all SRX Series devices have a built-in management interface named fxp0. For most SRX Series devices, the fxp0 interface is a dedicated port. For SRX100, SRX210, and SRX220 devices, after you enable chassis clustering and reboot the system, the built-in interface named fe-0/0/6 is repurposed as the management interface and is automatically renamed fxp0.

For the SRX5000 line, control interfaces are configured on SPCs. For the SRX3000 line and the SRX240, SRX550, SRX650, and SRX1400 devices, control interfaces are dedicated Gigabit Ethernet ports. For SRX100, SRX210, and SRX220 devices, after you enable chassis clustering and reboot the system, the built-in interface named fe-0/0/7 is repurposed as the control interface and is automatically renamed fxp1.

After the devices are connected as a cluster, the slot numbering on one device changes and thus the interface numbering will change. The slot number for each slot in both nodes is determined using the following formula:

cluster slot number = (node ID * maximum slots per node) + local slot number

In chassis cluster mode, the interfaces on the secondary node are renumbered internally. For example, the management interface port on the front panel of each SRX210 device is still labeled fe-0/0/6, but internally, the node 1 port is referred to as fe-2/0/6.

In chassis cluster mode, all FPC related configuration is performed under edit chassis node node-id fpc hierarchy. In non-cluster mode, the FPC related configuration is performed under edit chassis fpc hierarchy.

Table 1 shows the slot numbering, as well as the physical port and logical interface numbering, for both of the SRX Series devices that become node 0 and node 1 of the chassis cluster after the cluster is formed.

Information about chassis cluster slot numbering is also provided in Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, and Figure 9.

Note: See the appropriate Services Gateway Hardware Guide for details about SRX Series devices. The Junos OS Interfaces Configuration Guide for Security Devices  provides a full discussion of the interface naming convention.

After you enable chassis clustering, the two chassis joined together cease to exist as individuals and now represent a single system. As a single system, the cluster now has twice as many slots. (See Figure 1, Figure 2, Figure 3,Figure 4, Figure 5, Figure 6, Figure 7, Figure 8, and Figure 9.)

Figure 1: FPC Slot Numbering in an SRX Series Chassis Cluster (SRX5800 Devices)

Note: SRX5600 and SRX5800 devices have Flex I/O Cards (Flex IOCs) that have two slots to accept the following port modules: SRX-IOC-4XGE-XFP 4-Port XFP SRX-IOC-16GE-TX 16-Port RJ-45 SRX-IOC-16GE-SFP 16-Port SFP You can use these port modules to add from 4 to 16 Ethernet ports to your SRX Series device. Port numbering for these modules is slot/port module/port where slot is the number of the slot in the device in which the Flex IOC is installed; port module is 0 for the upper slot in the Flex IOC or 1 for the lower slot when the card is vertical, as in an SRX5800 device; and port is the number of the port on the port module. When the card is horizontal, as in an SRX5600 device, port module is 0 for the left-hand slot or 1 for the right-hand slot. See the Services Gateway Hardware Guide for your specific SRX Series model.

Figure 2: Slot Numbering in an SRX Series Chassis Cluster (SRX3400 Devices)

Figure 3: Slot Numbering in an SRX Series Chassis Cluster (SRX1400 Devices)

Figure 4: Slot Numbering in an SRX Series Chassis Cluster (SRX650 Devices)

Figure 5: Slot Numbering in an SRX Series Chassis Cluster (SRX550 Devices)

Figure 6: Slot Numbering in an SRX Series Chassis Cluster (SRX240 Devices)

Figure 7: Slot Numbering in an SRX Series Chassis Cluster (SRX220 Devices)

Figure 8: Slot Numbering in an SRX Series Chassis Cluster (SRX210 Devices)

Figure 9: Slot Numbering in an SRX Series Chassis Cluster (SRX100 Devices)