Fan speed XS 3800

Omnia

Hi all,

it's possible to set a maximun speed the fan of an xs-3800? our SFP+-T rj45, always stay over 70°C….

Zyxel_Tina

Hi @Omnia,

To help us assist you better, could you please provide the TechSupport Info file via private message?

For instructions on how to collect the TechSupport Info, please refer to this FAQ.

Omniasrl

Hi @Zyxel_Tina , can you send us a message to this account? the other one is unaccessible. Thanks

Zyxel_Tina

Hi @Omniasrl

If your 10G SFP-T module temperature exceeds 70°C, it is likely due to the position of the SFP module. Please note that regardless of the vendor, 10G copper SFP modules generally operate at a higher temperature than 10G fiber SFP modules. If you insert a 10G copper SFP module into a closer slot, the temperature may increase over 70°C due to heat accumulation.

Please help insert your 10G fiber SFP modules into these ports 2/8/10/16 and verify if this can fix the temperature issue.

Omniasrl

Hi Tina,

we have all sfp-t slot full in slot 1 and slot 2 we cannot move the sfp, sorry

Zyxel_Tina

Hi @Omnia,

We understand your concern. We suggested changing the SFP module's position because this switch is equipped with a smart fan that automatically adjusts its speed based on the temperature. When the system detects that a component, including an SFP module, is overheating, the smart fan will automatically engage and increase its speed to the maximum level to ensure optimal cooling and prevent damage.

Based on the log file you provided, the smart fan has already detected the high temperature from the SFP module and is, therefore, already operating at its maximum speed. Because this process is fully automated by the smart fan system, it is not possible to manually adjust or further increase the fan speed beyond its current level.

Omnia

ok, so we can manage this issue without move the SFP or there isn't solution? we can try to move switch and separate the switch by one rack unit each other?

Zyxel_Tina

Hi @Omnia,

We have conducted local testing in our lab with an ambient temperature is 24°C. In our test, we inserted 10G copper transceivers into ports 2, 8, 10, and 16 (connected with 30m Cat6A), while the remaining ports were randomly populated with 10G SR and LR modules. Under these conditions, the temperature of the 10G copper transceiver reached around 63°C, which is still lower than what you have encountered.

Based on this result, as we suggested moving the transceiver to different ports, we also recommend improving the surrounding environment since ambient temperature can impact the device. For example, adding a fan in the room for better ventilation may help improve the situation.

For your reference, we are sharing our local test data below.

Omnia

Hi @Zyxel_Tina ,

we have all sfp port full… i cannot move… sorry.. The switch are in a datacenter (18 °).

Zyxel_Tina

Hi @Omnia,

Sorry for the late reply!

Based on the images you provided, we can see that all SFP ports are fully populated with 10G base-T modules in consecutive ports. We generally do not recommend this setup as it tends to generate heat accumulation. It is usually advisable to alternate connections between 10G base-T and fiber SFP modules to prevent overheating issues.

We understand that you are currently unable to change the port arrangement. Therefore, as you mentioned before, separating the stacking switches by at least one rack unit is a good practice to improve airflow. Please try this method and see if it helps alleviate the overheating issue.