United States
Q
What are Cisco 40G Optical Modules?
A
Cisco 40G Optical Modules are hot-pluggable QSFP transceivers designed to enable 40 Gigabit Ethernet connectivity over multimode or single-mode fiber in Cisco switching and routing platforms.
Q
Which Cisco 40G Optical Module models are available?
A
Cisco offers QSFP-40G-SR4 for short-reach multimode, QSFP-40G-LR4 for up to 10 km SMF, QSFP-40G-ER4 for up to 40 km SMF, and QSFP-40G-UNIV for dual-rate support.
Q
What is the difference between QSFP-40G-SR4 and QSFP-40G-LR4?
A
QSFP-40G-SR4 uses 850 nm VCSEL over OM3/OM4 fiber for distances up to 150 m/400 m, while QSFP-40G-LR4 uses 1310 nm DWDM over single-mode fiber for distances up to 10 km.
Q
How far can Cisco 40G Optical Modules transmit data?
A
Distance depends on model: SR4 supports up to 150 m on OM3 and 400 m on OM4, LR4 up to 10 km, and ER4 up to 40 km over single-mode fiber.
Q
Are Cisco 40G Optical Modules compatible with non-Cisco switches?
A
Cisco 40G Optical Modules are coded for Cisco platforms; third-party compatibility is not guaranteed and may require switch firmware or vendor approval.
Q
Which connector types do Cisco 40G Optical Modules use?
A
Cisco 40G Optical Modules use MPO/MTP connectors for SR4 models and LC duplex connectors for LR4 and ER4 models.
Q
Do Cisco 40G Optical Modules support Digital Diagnostic Monitoring (DDM)?
A
Yes, all Cisco 40G Optical Modules support DDM, providing real-time monitoring of optical power, temperature, voltage, and laser bias current via the SFF-8436 interface.
Q
Can Cisco 40G Optical Modules perform 40G to 4×10G breakout?
A
Yes, Cisco supports breakout configurations on select platforms using QSFP-40G-SR4 or QSFP-40G-LR4 modules with compatible 4×10G fan-out cables.
Q
How do I install a Cisco 40G Optical Module?
A
Power off the port or follow hitless insertion procedures, align the module with the QSFP cage, press until it latches, then restore link and verify port status.
Q
How do I troubleshoot a Cisco 40G Optical Module link?
A
Verify fiber type, cable polarity, SFP status via show interface transceiver detail, check DDM diagnostics for power or temperature alarms, and inspect connectors.
Q
What wavelength do Cisco 40G Optical Modules operate on?
A
QSFP-40G-SR4 operates at 850 nm, QSFP-40G-LR4 at 1310 nm with four 25 Gbps channels, and QSFP-40G-ER4 at 1310 nm with extended reach DWDM wavelengths.
Q
What is the power consumption of Cisco 40G Optical Modules?
A
Typical power consumption ranges from 1.5 W for SR4 modules to 3.5 W for LR4/ER4 modules, depending on model and operating conditions.
Q
What temperature range do Cisco 40G Optical Modules support?
A
Cisco 40G Optical Modules support commercial (0 °C to 70 °C) and industrial (–40 °C to 85 °C) temperature ranges depending on model.
Q
How do I verify my Cisco 40G Optical Module firmware?
A
Use the CLI command show hw-module subslot <slot>/<subslot> transceiver details or show interface transceiver to display firmware version and compatibility status.
Q
What is the warranty for Cisco 40G Optical Modules?
A
Cisco 40G Optical Modules carry a limited lifetime warranty when purchased through Cisco or authorized partners, covering defects in materials and workmanship.
Q
How do I order Cisco 40G Optical Modules and check pricing?
A
Order via Cisco’s ordering portal or authorized resellers using the part number (e.g., QSFP-40G-SR4), then check list pricing in Cisco Commerce Workspace or partner catalogs.
