High-Power Optics for SmartFabric OS10
Dell EMC PowerSwitch S5448F-ON
December 2021
Rev. A00
Notes, cautions, and warnings
NOTE: A NOTE indicates important information that helps you make better use of your product.
CAUTION: A CAUTION indicates either potential damage to hardware or loss of data and tells you how to avoid the problem.
WARNING: A WARNING indicates a potential for property damage, personal injury, or death.
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1
OS10 High-power optics
The following describes important considerations for the Dell EMC PowerSwitch S5448F-ON switch running OS10 when using a mix of lower-power and higher-power optics.
Document revision history
Table 1. Revision history
Version
A00
Date
December 2021
Change
Initial release.
Introduction
Inconsistent environmental conditions in data centers can impact performance, reduce the lifespan of the infrastructure, and increase costs. Data centers use systems that regulate the temperature to keep the infrastructure operating in optimum conditions.
Dell EMC PowerSwitch devices, such as the S5448F-ON, use air to dissipate the heat generated by the internal electronics.
Each PowerSwitch data center platform can be installed in two types to adjust the airflow direction to the data center cooling systems: normal airflow (I/O-to-PSU), where air flows from the I/O panel to the power supply unit (PSU) modules, and reverse airflow (PSU-to-I/O), where air flows from the PSU modules to the I/O panel.
By design, some optics validated on the S5448F-ON function at a high rate of power.
Although these optics are qualified and their power consumption is within the operating range, you must be aware of some limitations when using high-power optics.
First, high-power optics increase the demand for power and can cause a rise in temperatures that requires more cooling.
Second, rack-installed reverse airflow devices increase the amount of warm air that flows over the optics. This warm airflow increases the temperature of the optics and thus, can limit their maximum operating power.
For the S5448F-ON, the QSFP56-DD media must not exceed their critical power levels: 20 W for four ports and 15 W for the remaining ports. To avoid issues with a rise in temperature when using QSFP56-DD media, you must monitor the power consumption of all optics and ensure their values stay below the critical threshold. This limit keeps the ports within a safe operating range and within total device power specifications.
Dell EMC has made specific supplier selections for solutions that both satisfy stringent quality requirements and provide lower power characteristics.
400 GbE optics incorporate integrated digital signal processors (DSPs). These DSPs can exhibit appreciably different power requirements that are based on the chip, port speed, and signal modulation.
The next section provides the safe operating power limits for high-power optics.
WARNING: Third-party optics may pose a high risk of exceeding thresholds. Dell EMC only evaluates and supports Dell-supplied media.
NOTE: Dell EMC continues to update the supported high-power optics, including the 100 GbE QSFP28 and 400 GbE
QSFP56-DD media types.
For an updated list of supported optics, contact your Dell EMC representative.
List of high-power optics, thresholds, and switch ports
The following tables list the thresholds for the PowerSwitch S5448F-ON running version OS10.5.3.0 and beyond.
OS10 High-power optics 3
NOTE: The CLI does not report the critical threshold. Be sure to monitor max-module-power per the thresholds listed in the following tables.
CAUTION: If your deployment must exceed the critical thresholds, consult your Dell EMC representative immediately for specific guidelines.
Module power and port data
The following tables list the module power rating values and the allowed panel port numbers for switches with Normal or
Reverse airflow.
Normal airflow (I/O-to-PSU)
Table 2. 400G QSFP56-DD media
Type Model
Optic
Optic
Active optical cable
Active copper cable
Active copper cable
Optic
Optic
QSFP56-DD-400G-SR8
QSFP56-DD-400G-SR4.2
AOC-QSFP56-DD-400G-10m,
15m
ACC-QSFP56-DD-400G- 3m,
5m
ACC-QSFP56-DD-4QSFP28-
3m, 5m
QSFP56-DD-400G-FR4
QSFP56-DD-400G-EDR4
Module power rating (W)
12
13.5
12
10
10
10
10
Table 3. 2x100G QSFP28-DD media
Type
Optic
Model Module power rating (W)
QSFP28-DD-200G-80G-2SR4 3.5
Active optical cable 3.5
Active optical cable
Active optical cable
AOC-QSFP28-DD-200G-5m,
10m, 15m
AOC-QSFP28-
DD-2QSFP28-100G-5m,
7m, 15m
AOC-QSFP28-
DD-8SFP28-25G-7m, 10m
3.5
3.5
Table 4. 2x40G QSFP-DD media
Type Model
Active optical cable
Active optical cable
AOC-QSFP-
DD-2QSFP-40G-7m
AOC-QSFP-
DD-8SFP-10G-7m, 10m
Table 5. 100G QSFP28 media
Type
Optic
Model
QSFP28-100G-SR4-G2
Module power rating (W)
1.5
1.5
Module power rating (W)
2.5
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
4 OS10 High-power optics
Table 5. 100G QSFP28 media (continued)
Type
Optic
Optic
Optic
Optic
Optic
Model
QSFP28-100G-ESR4
QSFP28-100G-BIDI
QSFP28-100G-SWDM4
QSFP28-100G-CWDM4
3.5
3.5
QSFP28-100G-40G-PSM4-IR 3.5
Module power rating (W)
2.5
3.5
Optic
Optic
Optic
Active optical cable
Active optical cable
QSFP28-100G-LR4-G3
QSFP28-100G-ER4-LITE
QSFP28-100G-FR
AOC-QSFP28-100G-2m, 3m,
7m, 10m, 30m
AOC-
QSFP28-4SFP28-25G-10m,
30m
4.0
4.5
4.0
2.5
2.5
Table 6. 40G QSFP+ media
Type
Optic
Optic
Model
QSFP-40G-SR4
QSFP-40G-ESR4
Optic
Optic
Optic
Optic
Active optical cable
Active optical cable
QSFP-40G-BIDI
QSFP-40G-SM4
QSFP-40G-LR4
QSFP-40G-ER4
AOC-QSFP-40G-3m, 10m
AOC-QSFP-4SFP-10G-10m,
30m
3.5
1.3
1.3
3.5
2.0
3.5
Module power rating (W)
1.5
1.5
Table 7. 100G SFP56-DD media
Type Model
Optic SFP56-DD-100G-FR
Optic SFP56-DD-100G-LR
Table 8. SFP56-DD port with 25G SFP28 media
Type Model
Optic
Optic
Optic
Active optical cable
SFP28-25G-SR-G2
SFP28-25G-ESR
SFP28-25G-LR
AOC-SFP28-25G-2m, 7m,
10m, 15m, 30m
Table 9. SFP56-DD port with 10G SFP+ media
Type Model
Optic SFP-10G-SR
Module power rating (W)
3.5
3.5
Module power rating (W)
1.5
1.5
1.5
1.0
Module power rating (W)
<1.0
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(5...52)
(5...52)
Panel port number allowed
(5...52)
(5...52)
(5...52)
(5...52)
Panel port number allowed
(5...52)
OS10 High-power optics 5
Table 9. SFP56-DD port with 10G SFP+ media (continued)
Type
Optic
Model
SFP-10G-USR
Module power rating (W)
<1.0
Optic
Optic
Optic
Active copper
SFP-10G-LR
SFP-10G-ER
SFP-10G-ZR
SFP-10G-T-30M
1.0
1.5
1.5
2.5
Panel port number allowed
(5...52)
(5...52)
(5...52)
(5...52)
(5...52)
Reverse airflow (PSU-to-I/O)
Table 10. 400G QSFP56-DD media
Type Model
Optic
Optic
Active optical cable
Active copper cable
Active copper cable
Optic
Optic
QSFP56-DD-400G-SR8
QSFP56-DD-400G-SR4.2
AOC-QSFP56-DD-400G-10m,
15m
ACC-QSFP56-DD-400G- 3m,
5m
ACC-QSFP56-DD-4QSFP28-
3m, 5m
QSFP56-DD-400G-FR4
QSFP56-DD-400G-EDR4
Module power rating (W)
12
13.5
12
10
10
10
10
Table 11. 2x100G QSFP28-DD media
Type
Optic
Model Module power rating (W)
QSFP28-DD-200G-80G-2SR4 3.5
Active optical cable 3.5
Active optical cable
Active optical cable
AOC-QSFP28-DD-200G-5m,
10m, 15m
AOC-QSFP28-
DD-2QSFP28-100G-5m,
7m, 15m
AOC-QSFP28-
DD-8SFP28-25G-7m, 10m
3.5
3.5
Table 12. 2x40G QSFP-DD media
Type Model
Active optical cable
Active optical cable
AOC-QSFP-
DD-2QSFP-40G-7m
AOC-QSFP-
DD-8SFP-10G-7m, 10m
Module power rating (W)
1.5
1.5
Table 13. 100G QSFP28 media
Type
Optic
Model
QSFP28-100G-SR4-G2
Optic QSFP28-100G-ESR4
Module power rating (W)
2.5
2.5
Panel port number allowed
None
None
None
(2, 4, 54, 56)
(2, 4, 54, 56)
(2, 4, 54, 56)
(2, 4, 54, 56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
6 OS10 High-power optics
Table 13. 100G QSFP28 media (continued)
Type
Optic
Optic
Optic
Optic
Optic
Model
QSFP28-100G-BIDI
QSFP28-100G-SWDM4
QSFP28-100G-CWDM4 3.5
QSFP28-100G-40G-PSM4-IR 3.5
QSFP28-100G-LR4-G3 4.0
Module power rating (W)
3.5
3.5
Optic
Optic
Active optical cable
Active optical cable
QSFP28-100G-ER4-LITE
QSFP28-100G-FR
AOC-QSFP28-100G-2m, 3m,
7m, 10m, 30m
AOC-
QSFP28-4SFP28-25G-10m,
30m
4.5
4.0
2.5
2.5
Table 14. 40G QSFP+ media
Type
Optic
Model
QSFP-40G-SR4
Optic
Optic
Optic
Optic
Optic
Active optical cable
Active optical cable
QSFP-40G-ESR4
QSFP-40G-BIDI
QSFP-40G-SM4
QSFP-40G-LR4
QSFP-40G-ER4
AOC-QSFP-40G-3m, 10m
AOC-QSFP-4SFP-10G-10m,
30m
3.5
3.5
1.3
1.3
Module power rating (W)
1.5
1.5
3.5
2.0
Table 15. 100G SFP56-DD media
Type
Optic
Optic
Model
SFP56-DD-100G-FR
SFP56-DD-100G-LR
Table 16. SFP56-DD port with 25G SFP28 media
Type
Optic
Model
SFP28-25G-SR-G2
Optic
Optic
Active optical cable
SFP28-25G-ESR
SFP28-25G-LR
AOC-SFP28-25G-2m, 7m,
10m, 15m, 30m
Table 17. SFP56-DD port with 10G SFP+ media
Type
Optic
Optic
Model
SFP-10G-SR
SFP-10G-USR
Module power rating (W)
3.5
3.5
Module power rating (W)
1.5
1.5
1.5
1.0
Module power rating (W)
<1.0
<1.0
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
(1-4, 53-56)
Panel port number allowed
(5...52)
(5...52)
Panel port number allowed
(5...52)
(5...52)
(5...52)
(5...52)
Panel port number allowed
(5...52)
(5...52)
OS10 High-power optics 7
Table 17. SFP56-DD port with 10G SFP+ media (continued)
Type
Optic
Model
SFP-10G-LR
Module power rating (W)
1.0
Optic
Optic
Active copper
SFP-10G-ER
SFP-10G-ZR
SFP-10G-T-30M
1.5
1.5
2.5
Panel port number allowed
(5...52)
(5...52)
(5...52)
(5...52)
Port threshold value data
The following tables list the high-port and critical-port threshold values for switches with Normal or Reverse airflow.
NOTE: The QSFP56-DD ports support QSFP56-DD, QSFP28-DD, QSFP28, and QSFP optical modules.
NOTE:
● If you insert an optic with a power level higher than the "High port threshold" value listed in the following tables, a warning message displays, but the port operates.
● If you insert an optic with a power level higher than the "Critical port threshold" value listed in the following tables, a warning message displays, but the port does not operate.
Normal airflow (I/O-to-PSU)
Table 18. QSFP56-DD
Ports
11, 3, 53, 55
2, 4, 54, 56
Table 19. SFP56-DD
Ports
5...52
High port threshold (W)
18 W
13 W
High port threshold (W)
4.5 W
Critical port threshold (W)
20 W
15 W
Critical port threshold (W)
5 W
Reverse airflow (PSU-to-I/O)
Table 20. QSFP56-DD
Ports
1, 3, 53, 55
2, 4, 54, 56
High port threshold (W)
5 W
8 W
Table 21. SFP56-DD
Ports
5, 7, 9-47, 49, 51
6, 8, 10-48, 50, 52
High port threshold (W)
3 W
4.5 W
Critical port threshold (W)
6 W
10 W
Critical port threshold (W)
3.5 W
5 W
8 OS10 High-power optics
