Hello. I have a default ISP FRITZ!Box 7412 modem in a bridge mode and TP-Link Archer C7 v5 as PPPoE client and access point. Until Monday it used to work quite well, so I'm pretty sure my ISP did change something.
Now it seems to be broken somehow and I can't figure out, what's wrong. Here's my ISP modem config in the router mode, and it works. Sorry for German, I hope, the general settings are fine.
So, If I switch the modem to a bridge mode, and try to bring up the PPPoE on the OpenWrt router, it fails on the ipv6 dhcp step. Here's the modem bridge config
Router network config
root@OpenWrt:~# cat /etc/config/network
config interface 'loopback'
option ifname 'lo'
option proto 'static'
option ipaddr '127.0.0.1'
option netmask '255.0.0.0'
config globals 'globals'
option ula_prefix 'fdd7:7c41:9228::/48'
config interface 'lan'
option type 'bridge'
option ifname 'eth0.1'
option proto 'static'
option ipaddr '192.168.1.1'
option netmask '255.255.255.0'
option ip6assign '60'
config interface 'wan'
option proto 'dhcp'
option ifname 'eth0.7'
config switch
option name 'switch0'
option reset '1'
option enable_vlan '1'
config switch_vlan
option device 'switch0'
option vlan '1'
option ports '0t 2 3 4 5'
option vid '1'
config switch_vlan
option device 'switch0'
option vlan '2'
option vid '7'
option ports '0t 1'
config interface '1und1'
option proto 'pppoe'
option password 'hereisthepass'
option username 'H1und1/id@online.de'
option ifname 'eth0.7'
option auto '0'
option ipv6 'auto'
config interface 'wan6'
option ifname 'eth0.7'
option proto 'dhcpv6'
option reqaddress 'try'
option reqprefix 'auto'
And logs related to the connection attempt
Wed Dec 2 08:19:56 2020 daemon.notice netifd: Interface '1und1' is setting up now
Wed Dec 2 08:19:56 2020 daemon.err insmod: module is already loaded - slhc
Wed Dec 2 08:19:56 2020 daemon.err insmod: module is already loaded - ppp_generic
Wed Dec 2 08:19:56 2020 daemon.err insmod: module is already loaded - pppox
Wed Dec 2 08:19:56 2020 daemon.err insmod: module is already loaded - pppoe
Wed Dec 2 08:19:56 2020 daemon.info pppd[10815]: Plugin rp-pppoe.so loaded.
Wed Dec 2 08:19:56 2020 daemon.info pppd[10815]: RP-PPPoE plugin version 3.8p compiled against pppd 2.4.7
Wed Dec 2 08:19:56 2020 daemon.notice pppd[10815]: pppd 2.4.7 started by root, uid 0
Wed Dec 2 08:19:56 2020 daemon.info pppd[10815]: PPP session is 26846
Wed Dec 2 08:19:56 2020 daemon.warn pppd[10815]: Connected to e8:df:70:9f:b1:34 via interface eth0.7
Wed Dec 2 08:19:56 2020 kern.info kernel: [21990.055857] pppoe-1und1: renamed from ppp0
Wed Dec 2 08:19:56 2020 daemon.info pppd[10815]: Renamed interface ppp0 to pppoe-1und1
Wed Dec 2 08:19:56 2020 daemon.info pppd[10815]: Using interface pppoe-1und1
Wed Dec 2 08:19:56 2020 daemon.notice pppd[10815]: Connect: pppoe-1und1 <--> eth0.7
Wed Dec 2 08:20:00 2020 daemon.info pppd[10815]: Remote message: [UI-SBR:112770,32000;UI-LINEID:1UND1.DEU.DTAG.KBBJV;]
Wed Dec 2 08:20:00 2020 daemon.notice pppd[10815]: PAP authentication succeeded
Wed Dec 2 08:20:00 2020 daemon.notice pppd[10815]: peer from calling number E8:DF:70:9F:B1:34 authorized
Wed Dec 2 08:20:00 2020 daemon.notice pppd[10815]: local LL address fe80::68a4:33b7:af58:3343
Wed Dec 2 08:20:00 2020 daemon.notice pppd[10815]: remote LL address fe80::9203:25ff:fe74:4e06
Wed Dec 2 08:20:00 2020 daemon.notice netifd: Network device 'pppoe-1und1' link is up
Wed Dec 2 08:20:00 2020 daemon.notice netifd: Interface '1und1' is now up
Wed Dec 2 08:20:00 2020 daemon.notice netifd: Network alias 'pppoe-1und1' link is up
Wed Dec 2 08:20:00 2020 daemon.notice netifd: Interface '1und1_6' is enabled
Wed Dec 2 08:20:00 2020 daemon.notice netifd: Interface '1und1_6' has link connectivity
Wed Dec 2 08:20:00 2020 daemon.notice netifd: Interface '1und1_6' is setting up now
Wed Dec 2 08:20:00 2020 user.notice firewall: Reloading firewall due to ifup of 1und1 (pppoe-1und1)
Wed Dec 2 08:20:02 2020 authpriv.warn dropbear[10979]: Failed listening on '22': Error listening: Invalid argument
Wed Dec 2 08:20:02 2020 authpriv.info dropbear[10979]: Early exit: No listening ports available.
Wed Dec 2 08:20:02 2020 daemon.info pppd[10815]: LCP terminated by peer
Wed Dec 2 08:20:02 2020 daemon.err odhcp6c[10926]: Failed to send RS (Permission denied)
Wed Dec 2 08:20:02 2020 daemon.err odhcp6c[10926]: Failed to send DHCPV6 message to ff02::1:2 (Permission denied)
Wed Dec 2 08:20:02 2020 daemon.notice netifd: Network device 'pppoe-1und1' link is down
Wed Dec 2 08:20:02 2020 daemon.notice netifd: Network alias 'pppoe-1und1' link is down
Wed Dec 2 08:20:02 2020 daemon.notice netifd: Interface '1und1_6' has link connectivity loss
Wed Dec 2 08:20:02 2020 daemon.notice pppd[10815]: Modem hangup
Wed Dec 2 08:20:02 2020 daemon.notice pppd[10815]: Connection terminated.
Wed Dec 2 08:20:02 2020 daemon.info pppd[10815]: Connect time 0.1 minutes.
Wed Dec 2 08:20:02 2020 daemon.info pppd[10815]: Sent 686 bytes, received 590 bytes.
Wed Dec 2 08:20:02 2020 daemon.info pppd[10815]: Sent PADT
Wed Dec 2 08:20:02 2020 daemon.notice netifd: Interface '1und1' has lost the connection
Wed Dec 2 08:20:02 2020 daemon.info pppd[10815]: Exit.
Wed Dec 2 08:20:03 2020 daemon.notice netifd: Interface '1und1' is now down
Wed Dec 2 08:20:03 2020 daemon.err odhcp6c[10926]: Failed to send DHCPV6 message to ff02::1:2 (Permission denied)
Please, help me to figure out, how to bring the PPPoE back to the router.
I've thought, it may be useful to post:
Hostname: OpenWrt
Model: TP-Link Archer C7 v5
Architecture: Qualcomm Atheros QCA956X ver 1 rev 0
Firmware Version: OpenWrt 19.07.4 r11208-ce6496d796 / LuCI openwrt-19.07 branch git-20.334.47525-e9bfb12
Modell: FRITZ!Box 7412 (UI)
FRITZ!OS: 06.86
