@seamoose Thanks. That's pretty much the config that I had. I've now setup an external VM and created a wireguard tunnel from my Pi 3B+ but it still won't fail running iperf3. Is there a specific payload that you're transferring? Also, your IPv6 config, is that just the default or did you do some manual configuration? On my Pi: $ ip a 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 valid_lft forever preferred_lft forever 2: eth0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether b8:27:eb:3e:ab:fb brd ff:ff:ff:ff:ff:ff inet 192.168.99.67/24 brd 192.168.99.255 scope global dynamic eth0 valid_lft 860949sec preferred_lft 860949sec inet6 fe80::ba27:ebff:fe3e:abfb/64 scope link valid_lft forever preferred_lft forever 3: wlan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000 link/ether b8:27:eb:6b:fe:ae brd ff:ff:ff:ff:ff:ff inet 192.168.99.57/24 brd 192.168.99.255 scope global dynamic wlan0 valid_lft 860949sec preferred_lft 860949sec inet6 fe80::ba27:ebff:fe6b:feae/64 scope link valid_lft forever preferred_lft forever 4: wg0: <POINTOPOINT,NOARP,UP,LOWER_UP> mtu 1420 qdisc noqueue state UNKNOWN group default qlen 1000 link/none inet 10.241.0.1/24 scope global wg0 valid_lft forever preferred_lft forever
** Also affects: linux-raspi (Ubuntu) Importance: Undecided Status: New ** No longer affects: linux-raspi (Ubuntu Eoan) ** Changed in: linux-raspi (Ubuntu Focal) Status: New => Confirmed ** No longer affects: linux-raspi2 (Ubuntu Focal) ** Changed in: linux-raspi (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1861936 Title: Raspberry Pi 3 network dies shortly after a burst of IPv6 tunnel network load ((lan78xx): transmit queue 0 timed out) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/1861936/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs