Node Interfaces on Active SRX Series Chassis Clusters

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

For Most SRX Series Devices	ge-0/0/0	ge-0/0/1	ge-0/0/2	ge-0/0/3	. . .
For SRX210 Devices	ge-0/0/0	ge-0/0/1	fe-0/0/2	fe-0/0/3	. . .
For SRX100 Devices	fe-0/0/0	fe-0/0/1	fe-0/0/2	fe-0/0/3	. . .

Caution: Layer 2 switching must not be enabled on an SRX Series device when chassis clustering is enabled. If you have enabled Layer 2 switching, make sure you disable it before enabling chassis clustering.

The factory default configuration for SRX100, SRX210, and SRX240 devices automatically enables Layer 2 Ethernet switching. Because Layer 2 Ethernet switching is not supported in chassis cluster mode, for these devices, if you use the factory default configuration, you must delete the Ethernet switching configuration before you enable chassis clustering. See Disabling Switching on SRX100, SRX210, and SRX240 Devices Before Enabling Chassis Clustering.

For chassis clustering, all SRX Series devices have a built-in management interface name fxp0. For most SRX Series devices, the fxp0.interface is a dedicated port. For SRX210 and SRX100 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 SRX650 and SRX240 devices, control interfaces are dedicated Gigabit Ethernet ports. For SRX210 and SRX100 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.

Table 80 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.

Table 80: SRX Series Chassis Cluster Slot Numbering, and Physical Port and Logical Interface Naming

Model	Chassis	Maximum Slots Per Node	Slot Numbering in a Cluster	Management Physical Port/Logical Interface	Control Physical Port/Logical Interface	Fabric Physical Port/Logical Interface
5800	Node 0	12 (FPC slots)	0 — 11	Dedicated Gigabit Ethernet port	Control port on an SPC	Any Ethernet port
	Node 0		0 — 11	fxp0	em0	fab0
	Node 1		12 — 23	Dedicated Gigabit Ethernet port	Control port on an SPC	Any Ethernet port
	Node 1		12 — 23	fxp0	em0	fab1
5600	Node 0	6 (FPC slots)	0 — 5	Dedicated Gigabit Ethernet port	Control port on an SPC	Any Ethernet port
	Node 0		0 — 5	fxp0	em0	fab0
	Node 1		6 — 11	Dedicated Gigabit Ethernet port	Control port on an SPC	Any Ethernet port
	Node 1		6 — 11	fxp0	em0	fab1
3600	Node 0	13 (CFM slots)	0 — 12	Dedicated Gigabit Ethernet port	Dedicated Gigabit Ethernet port	Any Ethernet port
	Node 0		0 — 12	fxp0	em0	fab0
	Node 1		13 — 25	Dedicated Gigabit Ethernet port	Dedicated Gigabit Ethernet port	Any Ethernet port
	Node 1		13 — 25	fxp0	em0	fab1
3400	Node 0	8 (CFM slots)	0 — 7	Dedicated Gigabit Ethernet port	Dedicated Gigabit Ethernet port	Any Ethernet port
	Node 0		0 — 7	fxp0	em0	fab0
	Node 1		8 — 15	Dedicated Gigabit Ethernet port	Dedicated Gigabit Ethernet port	Any Ethernet port
	Node 1		8 — 15	fxp0	em0	fab1
650	Node 0	9 (PIM slots)	0 — 8	ge-0/0/0	ge-0/0/1	Any Ethernet port
	Node 0		0 — 8	fxp0	fxp1	fab0
	Node 1		9 — 17	ge-9/0/0	ge-9/0/1	Any Ethernet port
	Node 1		9 — 17	fxp0	fxp1	fab1
240	Node 0	5 (PIM slots)	0 — 4	ge-0/0/0	ge-0/0/1	Any Ethernet port
	Node 0		0 — 4	fxp0	fxp1	fab0
	Node 1		5 — 9	ge-5/0/0	ge-5/0/1	Any Ethernet port
	Node 1		5 — 9	fxp0	fxp1	fab1
210	Node 0	2 (PIM slots)	0 and 1	fe-0/0/6	fe-0/0/7	Any Ethernet port
	Node 0		0 and 1	fxp0	fxp1	fab0
	Node 1		2 and 3	fe-2/0/6	fe-2/0/7	Any Ethernet port
	Node 1		2 and 3	fxp0	fxp1	fab1
100	Node 0	1(PIM slot)	0	fe-0/0/6	fe-0/0/7	Any Ethernet port
	Node 0		0	fxp0	fxp1	fab0
	Node 1		1	fe-1/0/6	fe-1/0/7	Any Ethernet port
	Node 1		1	fxp0	fxp1	fab1

Information about chassis cluster slot numbering is also provided in Figure 89, Figure 90, Figure 91, Figure 92, Figure 93, and Figure 94

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 89, Figure 90, Figure 91, Figure 92, Figure 93, and Figure 94.)

Figure 89: FPC Slot Numbering in an SRX Series Chassis Cluster (SRX5800 Devices)

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

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Figure 91: Slot Numbering in an SRX Series Chassis Cluster (SRX650 Devices)

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Figure 92: Slot Numbering in an SRX Series Chassis Cluster (SRX240 Devices)

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Figure 93: Slot Numbering in an SRX Series Chassis Cluster (SRX210 Devices)

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Figure 94: Slot Numbering in an SRX Series Chassis Cluster (SRX100 Devices)

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Node Interfaces on Active SRX Series Chassis Clusters

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