The switch seems to be not working as expected. Frames seems to be dropped or forwarded to the wrong port

[amreo]

Hi!
I have a turris omnia 1.1 with turris os version: 5.3.4.
My network is configurated as illustrated below.

┌───────────────┐      ┌────────────────┐       ┌────────┐
│               │LAN1  │                │LAN2   │        │
│   AP (tplink) ├──────┤  TURRIS OMNIA  ├───────┤  NAS   │
│               │      │                │       │        │
└───────────────┘      └────────────────┘       └────────┘

   x        x              x     x
    xxxxxxxx                xxxxx
      WIFI                  WIFI
    x       x              x     x
     xxxxxx                 xxxxx


     ┌───┐               x   ┌───┐
     │   │               xx  │   │
     │ S │ ──────────────xxx │ S │
     │ M │               xx  │ M │
     │   │               x   │   │
     └───┘                   └───┘

(I don’t have changed the default network configuration (and “layout”) except the ip addresses.)

The issue is that when I do the following actions:

1. connect to the TPLINK wifi network
2. ping the NAS
3. disconnect from the TPLINK wifi network
4. connect to the turris omnia wifi network

I have to wait a few minutes (~5m?) to be able to ping the NAS again (because I don’t receive ARP replies). In the meanwhile the ARP replies received by the turris omnia switch chip seems to be dropped or forwarded to the tplink (but I cannot simply monitor traffic between the tplink and turris omnia.

What is the cause of the issue? The Forwarding Database Entry of the switch? How can I fix it?

[amreo]

@Pepe there is a problem in the description of the issue? I am wondering why nobody has replied me yet

[amreo]

After an hour of investigation I have found that this issue is related to

• [Omnia] kernel's bridge FDB not reconciling switch's ATU (#165) · Issues · Turris / Turris OS / Turris Build · GitLab
• TO LAN switch or bridge blocks DHCP replies intermittently
• Lan ports aren't accessible for WiFi client for the first 250-330 seconds after connection
• OMNIA: Vlan on DSA port breaks arp responses (TOS 4.0.5)
• Access point configuration problem - Network and Wireless Configuration - OpenWrt Forum

[hagrid]

Hello, this issue seems to be fixed in a new kernel. You can try to switch your router to HBL branch to get the TOS6 to see if it helped.