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FS#1883 - WAN interface VLAN not working on AVM FRITZ!Box 4040 #6803

openwrt-bot opened this issue Oct 7, 2018 · 1 comment

FS#1883 - WAN interface VLAN not working on AVM FRITZ!Box 4040 #6803

openwrt-bot opened this issue Oct 7, 2018 · 1 comment


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@openwrt-bot openwrt-bot commented Oct 7, 2018


WAN interface of AVM FRITZ!Box 4040 is on eth1. To gain internet connectivity the ISP requires VLAN tagging with ID 7. But while I can send packets through interface eth1, I cannot through eth1.7.

Affected device:
Affected versions: All I have tested, that is: 18.06.1 and the snapshot available today.

I haven't seen any disturbing firewall rules and it still doesn't work after flushing iptables completely.

Steps to reproduce:

  • flash OpenWrt 18.06.1 to FRITZ!Box 4040
  • change WAN ifname to eth1.7
  • connect WAN port to laptop or monitoring device with Wireshark or similar
  • send something via eth1.7, e.g. ping, but dhcp or pppd are sending stuff anyway

What happens:

Monitoring device does not see pings, dhcp, pppoe or other packets that go through eth1.7. It received when sending via eth1 directly (untagged). When sniffing via tcpdump on the router, it looks like the packets are send, but they are actually not going over the wire.

What should happen:

VLAN tagged packets are send properly (so PPPoE discovery succeeds in the end).

It was advised to open this bug report in the following forum thread. There is also some more information including configuration dumps.

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@openwrt-bot openwrt-bot commented Jan 21, 2019


hey, i can confirm this problem on my zyxel nbg6617 which is also ipq40xx

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