# Intel E810 only uses the first two CPUs in Debian Trixie

**URL:** https://forum.suricata.io/t/intel-e810-only-uses-the-first-two-cpus-in-debian-trixie/6056
**Category:** Help
**Tags:** suricata
**Created:** [October 14, 2025, 12:42pm UTC](https://forum.suricata.io/t/intel-e810-only-uses-the-first-two-cpus-in-debian-trixie/6056 "2025-10-14T12:42:45Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![joma](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@joma](https://forum.suricata.io/u/joma)
#### Post date: [October 14, 2025, 12:42pm UTC](https://forum.suricata.io/t/intel-e810-only-uses-the-first-two-cpus-in-debian-trixie/6056/1 "2025-10-14T12:42:45Z")

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Dear Community,

we are facing the following problem.  
After updating to Debian 13, E810 interfaces only use the first two assigned CPUs.  
Load goes to 100% and the result is packet loss.  
Same configuration, same data ingest in Debian 12 works perfectly.

Is anyone else experiencing this problem?

Thanks in advance.

See following details:

Suricata Version 7.0.11

Driver Module: /lib/modules/6.12.48+deb13-amd64/kernel/drivers/net/ethernet/intel/ice/ice.ko.xz

DDP package: firmware-misc-nonfree 20230210-5 → /lib/firmware/intel/ice/ddp/ice-1.3.30.0.pkg

INTEL NIC:

02:00.0 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)  
02:00.1 Ethernet controller: Intel Corporation Ethernet Controller E810-XXV for SFP (rev 02)  
firmware-version: 4.80 0x80020544 1.3805.0

In the Suricata configuration, 15 CPUs are assigned, but the load is only distributed to the first two CPUs.

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### Author: ![joma](https://avatars.discourse-cdn.com/v4/letter/j/4af34b/32.png) [@joma](https://forum.suricata.io/u/joma)
#### Post date: [January 6, 2026, 8:38am UTC](https://forum.suricata.io/t/intel-e810-only-uses-the-first-two-cpus-in-debian-trixie/6056/2 "2026-01-06T08:38:36Z")

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The answer can apparently be found in INTEL’s support matrix.

> **[Intel® Ethernet Controller E810 Feature Support Matrix](https://www.intel.com/content/www/us/en/content-details/630155/intel-ethernet-controller-e810-feature-support-matrix.html?wapkw=E810-CQDA2%20product%20support%20matrix&DocID=630155)**
>
> This Intel® Ethernet Controller E810 Feature Support Matrix document provides a list of feature support provided by the NVM and software drivers at a given release.

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### Author: ![lukashino](https://yyz2.discourse-cdn.com/flex030/user_avatar/forum.suricata.io/lukashino/32/1150_2.png) [@lukashino](https://forum.suricata.io/u/lukashino)
#### Post date: [January 6, 2026, 2:03pm UTC](https://forum.suricata.io/t/intel-e810-only-uses-the-first-two-cpus-in-debian-trixie/6056/3 "2026-01-06T14:03:38Z")

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Quick response - I know John and Niels recently gave a talk on use of E810 on Debian.

Apparently, Intel should look into this but they (Intel) tested it up to Debian 11 only.

[![](https://canada1.discourse-cdn.com/flex030/uploads/suricata/original/2X/d/dda79cf7af19c9579ef90dc8f09cca94f29ee0df.jpeg "SuriCon 2025 | 100 Gbps in Practice") ](https://www.youtube.com/watch?v=s1SOKAUcpuw)