{"id":471,"date":"2026-07-11T07:59:15","date_gmt":"2026-07-11T07:59:15","guid":{"rendered":"https:\/\/francisfisher.me.uk\/problem\/?p=471"},"modified":"2026-07-12T18:47:23","modified_gmt":"2026-07-12T18:47:23","slug":"notes-on-glotrends-st7419-4x-2-5gbps-ethernet-card","status":"publish","type":"post","link":"https:\/\/francisfisher.me.uk\/problem\/2026\/notes-on-glotrends-st7419-4x-2-5gbps-ethernet-card\/","title":{"rendered":"Notes on GLOTRENDS ST7419 4x 2.5Gbps ethernet card"},"content":{"rendered":"\n

I recently bought a Minisforum MS-A2 and I wanted to add some extra 2.5gbps ethernet ports to it. I looked around and found the GLOTRENDS ST7419 which is described as \"ST7419 4-Port RJ45 2.5Gb Ethernet Network Card with Intel 1226 Controller, PCIE 3.0 X4 Interface\". Note the PCIE 3.0 interface.<\/em> <\/p>\n\n\n\n

https:\/\/www.glotrends-store.com\/products\/st7419-4-port-rj45-25gb-ethernet-network-card-with-intel-1226-controller,-pcie-30-x4-interface<\/p>\n\n\n\n

Once I started using it, I experienced absurd ping times of tens or hundreds of millseconds, that should have been ~1ms.<\/p>\n\n\n\n

vyos@vyos:~$ ping 172.16.5.1
PING 172.16.5.1 (172.16.5.1) 56(84) bytes of data.
64 bytes from 172.16.5.1: icmp_seq=1 ttl=64 time=671 ms
64 bytes from 172.16.5.1: icmp_seq=2 ttl=64 time=37.2 ms
64 bytes from 172.16.5.1: icmp_seq=3 ttl=64 time=529 ms
64 bytes from 172.16.5.1: icmp_seq=4 ttl=64 time=557 ms
64 bytes from 172.16.5.1: icmp_seq=5 ttl=64 time=53.3 ms
64 bytes from 172.16.5.1: icmp_seq=6 ttl=64 time=92.7 ms
64 bytes from 172.16.5.1: icmp_seq=7 ttl=64 time=355 ms
64 bytes from 172.16.5.1: icmp_seq=8 ttl=64 time=212 ms
64 bytes from 172.16.5.1: icmp_seq=9 ttl=64 time=88.4 ms<\/code><\/p>\n\n\n\n

I have spent a lot of time trying to solve this problem, assuming that there was a problem with a BIOS setting or a linux kernel setting that would make this work properly. After some time I swapped it from an AMD machine to an Intel one - ping issues continued.<\/p>\n\n\n\n

One thing that stands out when you run lspci<\/code> under Linux is that you see that there's a PCIE2 switch which connects the 4 I226-V controller to the PCIE bus. That's right, a PCIE2 switch on a device claiming PCIE3 support.<\/p>\n\n\n\n

07:00.0 PCI bridge: Pericom Semiconductor PI7C9X2G608GP PCIe2 6-Port\/8-Lane Packet Switch
08:01.0 PCI bridge: Pericom Semiconductor PI7C9X2G608GP PCIe2 6-Port\/8-Lane Packet Switch
08:02.0 PCI bridge: Pericom Semiconductor PI7C9X2G608GP PCIe2 6-Port\/8-Lane Packet Switch
08:03.0 PCI bridge: Pericom Semiconductor PI7C9X2G608GP PCIe2 6-Port\/8-Lane Packet Switch
08:04.0 PCI bridge: Pericom Semiconductor PI7C9X2G608GP PCIe2 6-Port\/8-Lane Packet Switch
09:00.0 Ethernet controller: Intel Corporation Ethernet Controller I226-V (rev 04)
0a:00.0 Ethernet controller: Intel Corporation Ethernet Controller I226-V (rev 04)
0b:00.0 Ethernet controller: Intel Corporation Ethernet Controller I226-V (rev 04)
0c:00.0 Ethernet controller: Intel Corporation Ethernet Controller I226-V (rev 04)<\/code><\/p>\n\n\n\n

The datasheet for the PI7C9X2G608GP confirms that it is a PCIE2 device not PCIE3. https:\/\/static.datasheets.com\/doc\/3835518-diodes-pi7c9x2g608gpbnjex-ds.pdf<\/p>\n\n\n\n

It seems like the GLOTRENDS ST7419 is a dud.<\/p>\n","protected":false},"excerpt":{"rendered":"

I recently bought a Minisforum MS-A2 and I wanted to add some extra 2.5gbps ethernet ports to it. I looked around and found the GLOTRENDS ST7419 which is described as \"ST7419 4-Port RJ45 2.5Gb Ethernet Network Card with Intel 1226 Controller, PCIE 3.0 X4 Interface\". Note the PCIE 3.0 interface. https:\/\/www.glotrends-store.com\/products\/st7419-4-port-rj45-25gb-ethernet-network-card-with-intel-1226-controller,-pcie-30-x4-interface Once I started using […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[34,6,33],"_links":{"self":[{"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/posts\/471"}],"collection":[{"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/comments?post=471"}],"version-history":[{"count":3,"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/posts\/471\/revisions"}],"predecessor-version":[{"id":474,"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/posts\/471\/revisions\/474"}],"wp:attachment":[{"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/media?parent=471"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/categories?post=471"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/francisfisher.me.uk\/problem\/wp-json\/wp\/v2\/tags?post=471"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}