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I/O Card SRX5K-40GE-SFP Specifications

The SRX5K-40GE-SFP I/O card (IOC) is optimized for Ethernet density and supports 40 Gigabit Ethernet ports (see Figure 6). The IOC assembly combines packet forwarding and Ethernet interfaces on a single board, with four 10-Gbps Packet Forwarding Engines. Each Packet Forwarding Engine consists of one I-chip for Layer 3 processing and one Layer 2 network processor. The IOCs interface with the power supplies and Switch Control Boards (SCBs).

You must install at least one IOC in the services gateway. The IOC can be of any of the available IOC or Flex IOC types.

You can install IOCs in any of the slots that are not reserved for Switch Control Boards (SCBs). If a slot is not occupied by a card, you must install a blank panel to shield the empty slot and to allow cooling air to circulate properly through the services gateway.

Figure 6: IOC SRX5K-40GE-SFP



  • I/O card with 40 Gigabit Ethernet SFP ports
  • Maximum configurable MTU: 9192 bytes
  • Maximum throughput: 40 Gbps

Software release

  • Junos OS Release 9.2 and later

Cables and connectors

40 Gigabit Ethernet SFP ports

Supported SFP transceivers:

1000BASE-LH (model numbers SRX-SFP-1GE-LH, SRX-SFP-1GE-LH-ET)

1000BASE-LX (model numbers SRX-SFP-1GE-LX, SRX-SFP-1GE-LX-ET)

1000BASE-SX (model numbers SRX-SFP-1GE-SX, SRX-SFP-1GE-SX-ET)

1000BASE-T (model numbers SRX-SFP-1GE-T, SRX-SFP-1GE-T-ET)



Supported Slots

  • SRX5600–Any slot except bottom slots 0 or 1
  • SRX5800–Any slot except center slots 0, 1, or 2/6

Power Requirement

312 W typical, 365 W maximum


Approximately 13 lb (5.9 kg)


OK/FAIL LED, one bicolor:

  • Steady green–The IOC is operating normally.
  • Red–The IOC has failed and is not operating normally.
  • Off–The IOC is powered down.

Serial Number Location

The serial number label is located as shown in Figure 7.

Figure 7: Serial Number Label (IOC Shown, Other Cards Similar)

Serial Number Label (IOC Shown,
Other Cards Similar)

Related Documentation

Modified: 2017-04-20