Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX300, SRX320, SRX340, SRX345, SRX380, SRX1500, and SRX1600 devices.
Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX4600 Devices
Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX2300, SRX4100, and SRX4200 Devices
Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX5800, SRX5600, and SRX5400 Devices
FPC Slot Numbering in SRX Series Firewall Cards

Understanding SRX Series Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming

See the hardware documentation for your particular model (SRX Series Services Gateways) for details about SRX Series Firewalls. See Interfaces User Guide for Security Devices for a full discussion of interface naming conventions.

After the devices are connected as a cluster, the slot numbering on the SRX acting as node 1 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 SRX acting as node 1 are renumbered internally.

This topic describes the slot numbering and physical port and logical interface naming conventions for SRX Series Firewalls in a chassis cluster and includes following sections:

Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX300, SRX320, SRX340, SRX345, SRX380, SRX1500, and SRX1600 devices.

For SRX340 and SRX345 devices, the fxp0 interface is a dedicated port. For SRX300 and SRX320 devices, after you enable chassis clustering and reboot the system, the built-in interface named ge-0/0/0 is repurposed as the management interface and is automatically renamed fxp0.

For SRX300, SRX320, SRX340, SRX345, and SRX380 devices, after you enable chassis clustering and reboot the system, the build-in interface named ge-0/0/1 is repurposed as the control interface and is automatically renamed fxp1. The SRX300, SRX320, SRX340, SRX345 and SRX380 devices support only Gigabit Ethernet ports as fabric link.

SRX1500 devices have 16 GE interfaces and 4 XE ports.

SRX1600 devices have 16 (1G), 4 (10G), 2 (25G), 2 (1G) ports. The 2 (1G) ports are HA control ports and are not used for forwarding traffic.

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

Table 1: 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
SRX1600	Node 0	3	0	fxp0	Dedicated dual Control links with MACsec support	Dual fabric links
	Node 0		0	fxp0	em0/em1	fab0
	Node 1		7	fxp0	Dedicated dual Control links with MACsec support	Dual fabric links
	Node 1		7	fxp0	em0/em1	fab1
SRX1500	Node 0	3	0	fxp0	Dedicated Control port	Any Ethernet port
	Node 0		0	fxp0	em0	fab0
	Node 1		7	fxp0	Dedicated Control port	Any Ethernet port
	Node 1		7	fxp0	em0	fab1
SRX340,SRX345, and SRX380	Node 0	5 (PIM slots)	0—4	fxp0	ge-0/0/1	Any Ethernet port
	Node 0		0—4	fxp0	fxp1	fab0
	Node 1		5—9	fxp0	ge-5/0/1	Any Ethernet port
	Node 1		5—9	fxp0	fxp1	fab1
SRX320	Node 0	3 (PIM slots)	0—2	ge-0/0/0	ge-0/0/1	Any Ethernet port
	Node 0		0—2	fxp0	fxp1	fab0
	Node 1		3—5	ge-3/0/0	ge-3/0/1	Any Ethernet port
	Node 1		3—5	fxp0	fxp1	fab1
SRX300	Node 0	1(PIM slot)	0	ge-0/0/0	ge-0/0/1	Any Ethernet port
	Node 0		0	fxp0	fxp1	fab0
	Node 1		1	ge-1/0/0	ge-1/0/1	Any Ethernet port
	Node 1		1	fxp0	fxp1	fab1

Table 2: Chassis Cluster Fabric Interface Details for SRX1600
Interfaces	Used as Fabric Port?	Supports Z-Mode Traffic?	Supports MACsec?
16X1Gigabit Ethernet Interface -BASE-T RJ45	Yes	Yes	No
2x 25G SFP28	Yes	Yes	No
4x 10G SFP+	Yes	Yes	No

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, and Figure 6.)

Figure 1: Slot Numbering in SRX300 Chassis Cluster

Figure 2: Slot Numbering in SRX320 Chassis Cluster

Figure 3: Slot Numbering in SRX340 Chassis Cluster

Figure 4: Slot Numbering in SRX345 Chassis Cluster

Figure 5: Slot Numbering in SRX380 Chassis Cluster

Figure 6: Slot Numbering in SRX1500 Chassis Cluster

Figure 7: Slot Numbering in SRX1600 Chassis Cluster

Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX4600 Devices

The SRX4600 devices use dedicated HA control and fabric ports.

Table 3 and Table 4 show the slot numbering, as well as the physical port and logical interface numbering, for both of the SRX Series Firewalls that become node 0 and node 1 of the chassis cluster after the cluster is formed.

For information on SRX3400 and SRX3600 devices, see Chassis Cluster support on SRX3400 and SRX3600 devices.

Table 3: Chassis Cluster Slot Numbering, and Physical Port and Logical Interface Naming for SRX4600 Devices
Model	Chassis Cluster	Maximum Slots Per Node	Slot Numbering in a Cluster	Management Physical Port/Logical Interface	Control Physical Port/Logical Interface	Fabric Physical Port/Logical Interface
SRX4600	Node 0	1	0-6	fxp0	Dual (redundant) MACsec-enabled HA control ports (10GbE) are xe-0/0/0 and xe-0/0/1 It uses 1-Gigabit Ethernet SFP as control port.	Dual (redundant) MACsec-enabled HA fabric ports (10GbE) Dual Fabric ports with macsec enabled are xe-0/0/2 and xe-0/0/3
SRX4600	Node 1	1	7-13	fxp0

Table 4: Chassis Cluster Interface Renumbering for SRX4600
Device	Renumbering Constant	Node 0 Interface Name	Node 1 Interface Name
SRX4600	7	xe-1/0/0	xe-8/0/0

Table 5: Chassis Cluster Fabric Interface Details for SRX4600
Interfaces	Used as Fabric Port?	Supports Z-Mode Traffic?	Supports MACsec?
Dedicated fabric ports	Yes	Yes	Yes
8X10-Gigabit Ethernet Interface SFPP ports	Yes	Yes	No
4X40-Gigabit Ethernet Interface QSFP28 ports	Yes	Yes	No
4x10-Gigabit Ethernet Interface SFPP ports	Yes	Yes	No
2X100-Gigabit Ethernet Interface QSFP28 slots	No	No	No

Mix and match of fabric ports are not supported. That is, you cannot use one 10-Gigabit Ethernet interface and one 40-Gigabit Ethernet interface for fabric links configuration. Dedicated fabric link supports only 10-Gigabit Ethernet Interface.

Figure 8 shows the slot numbering for both of the SRX Series Firewalls that become node 0 and node 1 of the chassis cluster after the cluster is formed.

Figure 8: Slot Numbering in SRX4600 Chassis Cluster

Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX2300, SRX4100, and SRX4200 Devices

The SRX4100 and SRX4200 devices use two 1-Gigabit Ethernet/10-Gigabit Ethernet ports, labeled as CTL and FAB as control port and fabric port respectively.

Supported fabric interface types for SRX4100 and SRX4200 devices are 10-Gigabit Ethernet (xe) (10-Gigabit Ethernet Interface SFP+ slots).

Table 6: Chassis Cluster Fabric Interface Details for SRX2300
Interfaces	Used as Fabric Port?	Supports Z-Mode Traffic?	Supports MACsec?
8X10-Gigabit Ethernet Interface SFPP ports	Yes	Yes	No
4X25-Gigabit Ethernet Interface SFP28 ports	Yes	Yes	No
8x10-Gigabit Ethernet Interface BASE-T RJ45 ports	Yes	Yes	No
2X100-Gigabit Ethernet Interface QSFP28 slots	No	No	No

SRX4100 and SRX4200 devices do not support direct attach copper (DAC) cables for chassis cluster control.

Table 7 shows the slot numbering, as well as the physical port and logical interface numbering, for both of the SRX Series Firewalls that become node 0 and node 1 of the chassis cluster after the cluster is formed

Table 7: Chassis Cluster Slot Numbering, and Physical Port and Logical Interface Naming for SRX2300, SRX4100 and SRX4200 Devices
Model	Chassis Cluster	Maximum Slots Per Node	Slot Numbering in a Cluster	Management Physical Port/Logical Interface	Control Physical Port/Logical Interface	Fabric Physical Port/Logical Interface
SRX2300	Node 0	1	0	fxp0	Dedicated control port, em0/em1	Revenue interfaces are used for dual fabric links, fab0.
SRX2300	Node 1	1	7	fxp0	Dedicated control port, em0/em1	Revenue interfaces are used for dual fabric links, fab1.
SRX4100	Node 0	1	0	fxp0	Dedicated control port, em0	Dedicated fabric port, any Ethernet port (for dual fabric-link), fab0
SRX4100	Node 1	1	7	fxp0	Dedicated control port, em0	Dedicated fabric port, and any Ethernet port (for dual fabric-link), fab1
SRX4200	Node 0	1	0	fxp0	Dedicated control port,em0	Dedicated fabric port, and any Ethernet port (for dual fabric-link), fab0
SRX4200	Node 1	1	7	fxp0	Dedicated control port,em0	Dedicated fabric port, and any Ethernet port (for dual fabric-link), fab1

Figure 10 and Figure 11 shows the slot numbering for both of the SRX Series Firewalls that become node 0 and node 1 of the chassis cluster after the cluster is formed.

Figure 9: Slot Numbering in SRX2300

Figure 10: Slot Numbering in SRX4100 Chassis Cluster

Figure 11: Slot Numbering in SRX4200 Chassis Cluster

The node 1 renumbers its interfaces by adding the total number of system FPCs to the original FPC number of the interface. For example, see Table 8 for interface renumbering on the SRX Series Firewalls (SRX4100 and SRX4200).

Table 8: Chassis Cluster Interface Renumbering for SRX1600, SRX2300, SRX4100 and SRX4200
Device	Renumbering Constant	Node 0 Interface Name	Node 1 Interface Name
SRX1600	7	xe-0/1/0	xe-7/1/0
SRX2300	7	xe-0/2/0	xe-7/2/0
SRX4100	7	xe-0/0/0	xe-7/0/0
SRX4200	7	xe-0/0/1	xe-7/0/1

On SRX4100 and SRX4200 devices, when the system comes up as chassis cluster, the xe-0/0/8 and xe-7/0/8 interfaces are automatically set as fabric interfaces links. You can set up another pair of fabric interfaces using any pair of 10-Gigabit interfaces to serve as the fabric between nodes. Note that, the automatically created fabric interfaces cannot be deleted. However, you can delete the second pair of fabric interfaces (manually configured interfaces).

Chassis Cluster Slot Numbering and Physical Port and Logical Interface Naming for SRX5800, SRX5600, and SRX5400 Devices

For chassis clustering, all SRX Series Firewalls have a built-in management interface named fxp0. For most SRX Series Firewalls, the fxp0 interface is a dedicated port.

For the SRX5000 line, control interfaces are configured on SPCs.

Table 9 shows the slot numbering, as well as the physical port and logical interface numbering, for both of the SRX Series Firewalls that become node 0 and node 1 of the chassis cluster after the cluster is formed.

Table 9: Chassis Cluster Slot Numbering, and Physical Port and Logical Interface Naming for SRX5000 Line Devices
Model	Chassis Cluster	Maximum Slots Per Node	Slot Numbering in a Cluster	Management Physical Port/Logical Interface	Control Physical Port/Logical Interface	Fabric Physical Port/Logical Interface
SRX5800	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
SRX5600	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
SRX5400	Node 0	3 (FPC slots)	0—2	Dedicated Gigabit Ethernet port	Control port on an SPC	Any Ethernet port
	Node 0		0—2	fxp0	em0	fab0
	Node 1		3—5	Dedicated Gigabit Ethernet port	Control port on an SPC	Any Ethernet port
	Node 1		3—5	fxp0	em0	fab1

Figure 12: Slot Numbering in SRX5800 Chassis Cluster

FPC Slot Numbering in SRX Series Firewall Cards

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 Firewall. Port numbering for these modules is

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 SRX5400 or SRX5600 device, port module is 0 for the left-hand slot or 1 for the right-hand slot.

SRX5400 devices support only SRX5K-MPC cards. The SRX5K-MPC cards also have two slots to accept the following port modules:

SRX-MIC-10XG-SFPP 10-port-SFP+ (xe)
SRX-MIC-20GE-SFP 20-port SFP (ge)
SRX-MIC-1X100G-CFP 1-port CFP (et)
SRX-MIC-2X40G-QSFP 2-port QSFP (et)

See the hardware guide for your specific SRX Series model (SRX Series Services Gateways).

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