For a brownfield SAN using mixed OM3 and OM4, how should I size distances and patching when deploying the Cisco DS-SFP-FC8G-SW 8G short-wave transceiver?

On OM3, plan ~150 m; on OM4, ~190–200 m assuming clean fiber and minimal patching. Keep jumpers short, reduce interconnects, and verify loss budgets. If spans exceed limits or margins are tight, move to the long-wave DS-SFP-FC8G-LW.

When consolidating hosts on a Cisco MDS fabric, can DS-SFP-FC8G-SW safely autonegotiate to 4G with legacy HBAs without introducing fabric instability?

Yes, most 8G ports negotiate down to 4G. Ensure both ends allow speed negotiation, monitor for credit loss after cutover, and pin speed if unstable. Mixed speeds are common but confirm throughput expectations with the application teams.

What practical maintenance steps reduce CRC and slow-drain issues specifically on short-wave optics like DS-SFP-FC8G-SW in busy data halls?

Use strict LC cleaning, inspect under scope, replace worn jumpers, and limit mating cycles. Enable DOM alarms, review interface counters weekly, and document patch paths to quickly isolate dirty or damaged cords causing intermittent errors.

Does choosing DS-SFP-FC8G-SW versus DS-SFP-FC8G-LW impact zoning, VSAN design, or only physical reach and optical budgets in Cisco MDS?

Optic choice only affects the physical layer: reach, power budget, and susceptibility to contamination. Zoning, VSANs, and FSPF remain unchanged. Keep logical policy identical across fabrics regardless of SW or LW optics.

If my storage team plans to migrate gradually to 16G, will DS-SFP-FC8G-SW links constrain us, and how should I plan interim port-channel designs?

8G links can be aggregated using SAN port-channels to increase throughput and resilience. For growth, introduce new 16G ISLs on parallel paths, then re-balance port-channels to avoid lengthy maintenance windows or forklift optics swaps.

What real-world DOM thresholds should I alert on for DS-SFP-FC8G-SW so field techs respond before user impact occurs?

Baseline Rx/Tx power after turn-up, then alert on deviations ~3 dB or vendor-recommended thresholds. Rising temperature or falling receive power typically precede CRC bursts; trigger tickets when trends cross early-warning bands, not only hard alarms.

In a lab validating new HBAs, how can I prove that poor performance stems from fiber hygiene rather than the DS-SFP-FC8G-SW module itself?

Swap known-good jumpers, clean and re-mate both sides, move the optic to another port, and compare DOM readings. If issues follow the fiber, it’s hygiene. If they follow the module across ports, RMA the transceiver after ruling out switch optics slots.

What are the best practices for staging DS-SFP-FC8G-SW replacements during firmware upgrades on Cisco MDS to minimize change risk?

Upgrade one fabric at a time, pre-label all optics, and validate link light and counters before reintroducing production. Keep spare DS-SFP-FC8G-SW modules, document roll-back, and run a quick IO test from representative hosts post-change.

Can DS-SFP-FC8G-SW be mixed with breakout cassettes and high-density patch panels without compromising signal integrity in crowded racks?

Yes, but minimize connector counts and maintain bend radii. Use OM4 where possible, keep polished and clean LC ends, and validate total insertion loss stays within budget. High-density panels magnify hygiene problems, so increase inspection cadence.

DS-SFP-FC8G-SW – 8Gbps Fibre Channel SW SFP+

Name: DS-SFP-FC8G-SW Price & DataSheet - Cisco Optics Modules
SKU: DS-SFP-FC8G-SW
Price: 19.00 USD
Availability: InStock
Rating: 5.00 (3 reviews)

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Cisco Optics Modules

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DS-SFP-FC8G-SW

Rated 5.00 out of 5 based on 3 customer ratings

(3 customer reviews)

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DS-SFP-FC8G-SW Description

The Cisco DS-SFP-FC8G-SW is an 8 Gbps Fibre Channel shortwave SFP+ transceiver engineered for Cisco MDS 9000 series switches and storage networking platforms. It is backward-compatible with 2 Gbps and 4 Gbps Fibre Channel speeds, allowing flexible deployment in mixed SAN environments.Operating at 850 nm over multimode fiber (MMF), the DS-SFP-FC8G-SW supports link distances up to 150 m on OM4 fiber, 100 m on OM3, and shorter distances on legacy MMF types. With its hot-swappable SFP+ form factor, low power consumption (~1 W), and Digital Optical Monitoring (DOM) support, it enables simplified network management and improved reliability.This module fully complies with Fibre Channel standards (FC-PI-4, SFF-8431, SFF-8472), delivering secure, low-latency, and high-bandwidth connectivity for mission-critical SAN applications in enterprise and data center environments.

Product Highlights

Data Rate

Maximum Reach

Wavelength

Product Comparison

Parameter	DS-SFP-FC8G-SW	DS-SFP-FC16G-SW
Form Factor	SFP+	SFP+
Data Rate	2/4/8 Gbps autosensing	4/8/16 Gbps autosensing
Wavelength	850 nm	850 nm
Media	MMF (OM2/OM3/OM4/OM5)	MMF (OM2/OM3/OM4/OM5)
Max Reach	150 m (OM4), 100 m (OM3)	125 m (OM4/OM5), 100 m (OM3)
Connector	Dual LC	Dual LC
Tx Power (dBm)	-7.5 to -1.0	-7.8 to -1.3
Rx Power (dBm)	-12.0 to 0	-10.5 to 0
DOM Support	Yes	Yes
Power Consumption	1 W	1 W
Operating Temperature	0°C to 70°C	0°C to 70°C
Standards	FC-PI-4, SFF-8431, SFF-8472	FC-PI-5, SFF-8431/8432/8472

DS-SFP-FC8G-SW Device Compatibility Reference

DownloadDS-SFP-FC8G-SW-Device-Compatibility.pdf

Specifications

Parameter	Specification	Parameter	Specification
Product ID	DS-SFP-FC8G-SW	Form Factor	SFP+
Standard	8G Fibre Channel SW	Data Rate	2/4/8 Gbps autosensing
Wavelength	850 nm	Connector	LC duplex
Fiber Type	MMF (OM2/OM3/OM4/OM5)	Maximum Reach	150 m (OM4), 100 m (OM3)
Transmit Power	-7.5 to -1.0 dBm	Receive Power	-12.0 to 0 dBm
DOM Support	Yes	Power Consumption	≤1 W
Operating Temp	0°C to 70°C	Storage Temp	-40°C to 85°C
Dimensions	8.5 × 13.55 × 56.5 mm	Weight	22.5 g
Warranty	5 years	Standards	FC-PI-4, SFF-8431/8472

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Friendly service. The package arrived safely despite the long distance.

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Glad to see you still stock these. Price was fair and shipping was fast.

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Verified authenticity. All good. A reliable source for maintenance parts.

Questions & Answers

For a brownfield SAN using mixed OM3 and OM4, how should I size distances and patching when deploying the Cisco DS-SFP-FC8G-SW 8G short-wave transceiver?
On OM3, plan ~150 m; on OM4, ~190–200 m assuming clean fiber and minimal patching. Keep jumpers short, reduce interconnects, and verify loss budgets. If spans exceed limits or margins are tight, move to the long-wave DS-SFP-FC8G-LW.
When consolidating hosts on a Cisco MDS fabric, can DS-SFP-FC8G-SW safely autonegotiate to 4G with legacy HBAs without introducing fabric instability?
Yes, most 8G ports negotiate down to 4G. Ensure both ends allow speed negotiation, monitor for credit loss after cutover, and pin speed if unstable. Mixed speeds are common but confirm throughput expectations with the application teams.
What practical maintenance steps reduce CRC and slow-drain issues specifically on short-wave optics like DS-SFP-FC8G-SW in busy data halls?
Use strict LC cleaning, inspect under scope, replace worn jumpers, and limit mating cycles. Enable DOM alarms, review interface counters weekly, and document patch paths to quickly isolate dirty or damaged cords causing intermittent errors.
Does choosing DS-SFP-FC8G-SW versus DS-SFP-FC8G-LW impact zoning, VSAN design, or only physical reach and optical budgets in Cisco MDS?
Optic choice only affects the physical layer: reach, power budget, and susceptibility to contamination. Zoning, VSANs, and FSPF remain unchanged. Keep logical policy identical across fabrics regardless of SW or LW optics.
If my storage team plans to migrate gradually to 16G, will DS-SFP-FC8G-SW links constrain us, and how should I plan interim port-channel designs?
8G links can be aggregated using SAN port-channels to increase throughput and resilience. For growth, introduce new 16G ISLs on parallel paths, then re-balance port-channels to avoid lengthy maintenance windows or forklift optics swaps.
What real-world DOM thresholds should I alert on for DS-SFP-FC8G-SW so field techs respond before user impact occurs?
Baseline Rx/Tx power after turn-up, then alert on deviations ~3 dB or vendor-recommended thresholds. Rising temperature or falling receive power typically precede CRC bursts; trigger tickets when trends cross early-warning bands, not only hard alarms.
In a lab validating new HBAs, how can I prove that poor performance stems from fiber hygiene rather than the DS-SFP-FC8G-SW module itself?
Swap known-good jumpers, clean and re-mate both sides, move the optic to another port, and compare DOM readings. If issues follow the fiber, it’s hygiene. If they follow the module across ports, RMA the transceiver after ruling out switch optics slots.
What are the best practices for staging DS-SFP-FC8G-SW replacements during firmware upgrades on Cisco MDS to minimize change risk?
Upgrade one fabric at a time, pre-label all optics, and validate link light and counters before reintroducing production. Keep spare DS-SFP-FC8G-SW modules, document roll-back, and run a quick IO test from representative hosts post-change.
Can DS-SFP-FC8G-SW be mixed with breakout cassettes and high-density patch panels without compromising signal integrity in crowded racks?
Yes, but minimize connector counts and maintain bend radii. Use OM4 where possible, keep polished and clean LC ends, and validate total insertion loss stays within budget. High-density panels magnify hygiene problems, so increase inspection cadence.

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Resources Downloads

Product Tag

SFP

DS-SFP-FC8G-SW – 8Gbps Fibre Channel SW SFP+

DS-SFP-FC8G-SW Description

Product Highlights

Product Comparison

DS-SFP-FC8G-SW Device Compatibility Reference

Specifications

Get More Information

Quality Certifications

Customer Reviews

Questions & Answers

For a brownfield SAN using mixed OM3 and OM4, how should I size distances and patching when deploying the Cisco DS-SFP-FC8G-SW 8G short-wave transceiver?

When consolidating hosts on a Cisco MDS fabric, can DS-SFP-FC8G-SW safely autonegotiate to 4G with legacy HBAs without introducing fabric instability?

What practical maintenance steps reduce CRC and slow-drain issues specifically on short-wave optics like DS-SFP-FC8G-SW in busy data halls?

Does choosing DS-SFP-FC8G-SW versus DS-SFP-FC8G-LW impact zoning, VSAN design, or only physical reach and optical budgets in Cisco MDS?

If my storage team plans to migrate gradually to 16G, will DS-SFP-FC8G-SW links constrain us, and how should I plan interim port-channel designs?

What real-world DOM thresholds should I alert on for DS-SFP-FC8G-SW so field techs respond before user impact occurs?

In a lab validating new HBAs, how can I prove that poor performance stems from fiber hygiene rather than the DS-SFP-FC8G-SW module itself?

What are the best practices for staging DS-SFP-FC8G-SW replacements during firmware upgrades on Cisco MDS to minimize change risk?

Can DS-SFP-FC8G-SW be mixed with breakout cassettes and high-density patch panels without compromising signal integrity in crowded racks?

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Standard Services

Resources Downloads

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