T_XApr 4
For the #Realtek #rtl9300 (excluding #rtl9310) switch chips for #OpenWrt further datasheet readings and bit fumbling brought me to the conclusion (for now) that it seems that there is no easy way for #IGMP / #MLD report trapping anymore. Hence #multicast snooping support for #rtl9300 on OpenWrt will be more tricky...
For #rtl93xx they introduced a new, powerful ACL / packet inspection system. And trapping has been changed quite a bit compared to #rtl83xx.
T_XMar 31
Found some 1000BASE-T #SFP <-> #RJ45 modules which work with the #uboot #tftpboot of this #Xikestor #Realtek #rtl93xx switch chip. And managed to figure out how to select a port other than the first one for tftpboot (just use the same weird, non-linear port numbers as the #DTS in #OpenWrt uses.) This now simplified my test setup quite a bit.
T_XFeb 9
Yaiy, finally, could get an #OpenWrt initramfs to boot on this #rtl93xx based switch, a #XikeStor SKS8310-8X! The OpenWrt commit message warned that you need to use a "suitable SFP module (some work, some don't)".
And I tried a bunch... (3m DAC: Cisco SFP-H10GB-CU3M, Flexoptic 10/100/1000BASE-T / RJ45 T.C12.02.A). Now a Ubiquiti OM-SM-10G-D worked.
And probably also only after updating a BPI-R4 I connect with from stock fw to 24.10.5 (SFP hotplugging seemed flaky before that?)
T_XFeb 6

Patchset v2 is out for the Linux bridge, to reduce checks in the #multicast fast path, and to later propagate a safety multicast (in)active state to #switchdev/#DSA:
https://patchwork.kernel.org/project/netdevbpf/cover/[email protected]/
Includes some fixes and got some nice Linux selftests: https://patchwork.kernel.org/project/netdevbpf/patch/[email protected]/
This is also the version currently used in this OpenWrt draft PR for #realtek / #rtl83xx (v6 - v8): https://github.com/openwrt/openwrt/pull/18780

#rtldsa #rtl93xx

[net-next,v2,00/14] net: bridge: reduce multicast checks in fast path - Patchwork

T_XSep 2, 2025
I just wanted to make a little #multicast safety feature in the Linux bridge available to #switchdev + #DSA, too, to use it on #rtl83xx / #rtl93xx #Realtek drivers / switches later. One suggestion on the PR was like, maybe we could do the locking differently or use atomics. Me several hours later:
T_XAug 9, 2025
Lol, fs.com wants $1150 for their #rtl93xx / #rtl9313 based switch, FS S5300-12S :D.
https://www.fs.com/products/185533.html?id=4486567
12-Port L3 Switch, Ethernet, Stackable - FS.com Deutschland

Der 12-Port Ethernet-Switch S5300-12S verfügt über 12x 10Gb SFP+ Ports und unterstützt Stacking. Erleben Sie blitzschnelle Übertragungsgeschwindigkeiten und optimierte Netzwerkleistung mit unseren erstklassigen 10-Gigabit-Switch-Lösungen.

FS.com
T_XAug 7, 2025
Interesting, the #XikeStor / #Seekswan SKS8300-12X switch seems to be rtl93xx based, too, with the most SFP ports I've seen for a #Realtek #rtl93xx or #rtl83xx device. According to this page it should be #rtl9313: http://visit.seekswan.com:6555/xksupport/SKS8300-12X.htm
And maybe it wouldn't be too hard to add to #OpenWrt as the smaller XikeStor SKS8300-8X is already supported there: https://openwrt.org/toh/hwdata/xikestor/xikestor_sks8300-8x
兮克SKS8300-12X交换机介绍

兮克SKS8300-12X交换机产品介绍

T_XJul 23, 2025

Hab' bei #TPLink nach dem Chipsatz für einen 19" #Switch mit 16x SFP+ gefragt (weil ich da gerne evtl. später mal #OpenWrt drauf hätte, insbesondere bei/mit #Realtek / #rtl93xx). Antwort:

"Aufgrund von Sicherheitsbedenken bieten wir unsere Chipsatzlösung nicht öffentlich an."

Okay, wenn DAS das Sicherheitskonzept ist, weiß ich dann ja jetzt, welchen Switch ich schonmal nicht haben will :D.

Bei #MikroTik hingegen habe ich in < 3h eine Antwort mit dem Chipsatz bekommen (#Marvell #98DX8216).

T_XJun 13, 2025
Nice talk at the @battlemesh about #Realtek #switches running #OpenWrt. To get people even more excited about it this is how an OpenWrt #LuCI can look like with 52 ports :D. This D-Link DGS-1210-52 F1 was obtained for just 50€ on a German second hand online market place (kleinanzeigen.de) and is now running in the #Nobreakspace. Always make sure to pick the correct revision though, there are switches with very similar names but which don't use a Realtek chip.
#rtl83xx #rtl93xx