Traffic flows on secondary switch but not on the main one [RTL8111/8168/8411, TPLINK TL-SG1016DE]

[olivluca]

I'm testing proxmox ve (8.3.0) on a minipc with two RTL8111/8168/8411 network cards.
If I connect it to the main switch (a semi-managed TPLINK TL-SG1016DE) the link comes up (1000Mbps full duplex) but there's no traffic (I see on the switch web interface that it receives packets on the port but no packet is sent).
If I plug it to a non-managed switch (which in turn is connected to the main switch) everything works.
The main switch is configured with all ports enabled on the default vlan 1.
The network in proxmox is the default configuration (no jumbo frame, vmbr0 bridge with the port enp4s0 as a member, the other port is on a different bridge currently unused).
Fun fact (most probably unrelated): this minipc has an m2 sata port and a pcie one, it came with a sata disk, when I installed a pcie ssd the name of the ports changed, IIRC they were enp1s0 and enp3s0 without the pcie ssd, now they are enp2s0 and enp4s0).

root@minipc:~# lspci
00:00.0 Host bridge: Intel Corporation Device 461c
00:02.0 VGA compatible controller: Intel Corporation Alder Lake-N [UHD Graphics]
00:14.0 USB controller: Intel Corporation Alder Lake-N PCH USB 3.2 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Alder Lake-N PCH Shared SRAM
00:16.0 Communication controller: Intel Corporation Alder Lake-N PCH HECI Controller
00:17.0 SATA controller: Intel Corporation Alder Lake-N SATA AHCI Controller
00:1a.0 SD Host controller: Intel Corporation Device 54c4
00:1c.0 PCI bridge: Intel Corporation Device 54ba
00:1c.6 PCI bridge: Intel Corporation Device 54be
00:1d.0 PCI bridge: Intel Corporation Alder Lake-N PCI Express Root Port
00:1d.1 PCI bridge: Intel Corporation Alder Lake-N PCI Express Root Port
00:1f.0 ISA bridge: Intel Corporation Alder Lake-N PCH eSPI Controller
00:1f.3 Audio device: Intel Corporation Alder Lake-N PCH High Definition Audio Controller
00:1f.4 SMBus: Intel Corporation Alder Lake-N SMBus
00:1f.5 Serial bus controller: Intel Corporation Alder Lake-N SPI (flash) Controller
01:00.0 Non-Volatile memory controller: Sandisk Corp WD Black SN770 NVMe SSD (rev 01)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)
03:00.0 Network controller: Realtek Semiconductor Co., Ltd. RTL8821CE 802.11ac PCIe Wireless Network Adapter
04:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev 15)

root@minipc:~# uname -a
Linux minipc 6.8.12-4-pve #1 SMP PREEMPT_DYNAMIC PMX 6.8.12-4 (2024-11-06T15:04Z) x86_64 GNU/Linux

root@minipc:~# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host noprefixroute
       valid_lft forever preferred_lft forever
2: enp2s0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc pfifo_fast master wanbr state DOWN group default qlen 1000
    link/ether 68:1d:ef:3d:b1:61 brd ff:ff:ff:ff:ff:ff
3: enp4s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UP group default qlen 1000
    link/ether 68:1d:ef:3d:b1:62 brd ff:ff:ff:ff:ff:ff
4: wlp3s0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether 40:9c:a7:ff:56:d8 brd ff:ff:ff:ff:ff:ff
5: vmbr0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 68:1d:ef:3d:b1:62 brd ff:ff:ff:ff:ff:ff
    inet 192.168.10.2/24 scope global vmbr0
       valid_lft forever preferred_lft forever
    inet6 fe80::6a1d:efff:fe3d:b162/64 scope link
       valid_lft forever preferred_lft forever
6: wanbr: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 68:1d:ef:3d:b1:61 brd ff:ff:ff:ff:ff:ff
    inet6 fe80::6a1d:efff:fe3d:b161/64 scope link
       valid_lft forever preferred_lft forever
7: veth101i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr101i0 state UP group default qlen 1000
    link/ether fe:3c:10:4f:c7:6e brd ff:ff:ff:ff:ff:ff link-netnsid 0
8: fwbr101i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 9a:9e:76:f3:72:e0 brd ff:ff:ff:ff:ff:ff
9: fwpr101p0@fwln101i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether 62:38:da:33:61:79 brd ff:ff:ff:ff:ff:ff
10: fwln101i0@fwpr101p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr101i0 state UP group default qlen 1000
    link/ether 9a:9e:76:f3:72:e0 brd ff:ff:ff:ff:ff:ff
11: veth103i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:8a:b2:a3:5d:6d brd ff:ff:ff:ff:ff:ff link-netnsid 1
12: tap104i0: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master wanbr state UNKNOWN group default qlen 1000
    link/ether 0a:47:39:31:b7:08 brd ff:ff:ff:ff:ff:ff
13: tap104i1: <BROADCAST,MULTICAST,PROMISC,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast master vmbr0 state UNKNOWN group default qlen 1000
    link/ether 2a:d2:7b:c0:f3:64 brd ff:ff:ff:ff:ff:ff
14: veth105i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether fe:0a:b2:1a:f3:6b brd ff:ff:ff:ff:ff:ff link-netnsid 2
15: veth107i0@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr107i0 state UP group default qlen 1000
    link/ether fe:55:26:da:99:56 brd ff:ff:ff:ff:ff:ff link-netnsid 3
16: fwbr107i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 7e:ed:2a:60:55:9d brd ff:ff:ff:ff:ff:ff
17: fwpr107p0@fwln107i0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master vmbr0 state UP group default qlen 1000
    link/ether 4e:91:8a:cb:ae:c4 brd ff:ff:ff:ff:ff:ff
18: fwln107i0@fwpr107p0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue master fwbr107i0 state UP group default qlen 1000
    link/ether 7e:ed:2a:60:55:9d brd ff:ff:ff:ff:ff:ff

 

[olivluca]

Right after posting I found that there's a firmware upgrade for the switch supposedly solving the issue (or a very similar one)
https://community.tp-link.com/en/business/forum/topic/224554?replyId=597932
Right now I cannot apply it (the switch is in use by the rest of the family) but I'll keep you posted if indeed it's the solution.

 

[olivluca]

Firmware upgrade done, it is working (or maybe it's just because I power cycled the switch)