Bridge with OpenWRT: Timeout waiting for PADO packets

[tyrannosaurhex]

Trying to configure bridge mode with TP-Link Archer A7 and BSNL Ubiqcom router. Following log is from A7.

Wed Mar 23 17:08:52 2022 daemon.warn pppd[10924]: Timeout waiting for PADO packets
Wed Mar 23 17:08:52 2022 daemon.err pppd[10924]: Unable to complete PPPoE Discovery
Wed Mar 23 17:08:52 2022 daemon.info pppd[10924]: Exit.
Wed Mar 23 17:08:53 2022 daemon.notice netifd: Interface 'wan' is now down
Wed Mar 23 17:08:53 2022 daemon.notice netifd: Interface 'wan' is setting up now
Wed Mar 23 17:08:53 2022 daemon.err insmod: module is already loaded - slhc
Wed Mar 23 17:08:53 2022 daemon.err insmod: module is already loaded - ppp_generic
Wed Mar 23 17:08:53 2022 daemon.err insmod: module is already loaded - pppox
Wed Mar 23 17:08:53 2022 daemon.err insmod: module is already loaded - pppoe
Wed Mar 23 17:08:53 2022 daemon.info pppd[11164]: Plugin rp-pppoe.so loaded.
Wed Mar 23 17:08:53 2022 daemon.info pppd[11164]: RP-PPPoE plugin version 3.8p compiled against pppd 2.4.8
Wed Mar 23 17:08:53 2022 daemon.notice pppd[11164]: pppd 2.4.8 started by root, uid 0
Wed Mar 23 17:08:54 2022 daemon.err odhcpd[1677]: Failed to send to ff02::1%lan@br-lan (Permission denied)
Wed Mar 23 17:08:55 2022 daemon.info dnsmasq[2798]: read /etc/hosts - 4 addresses
Wed Mar 23 17:08:55 2022 daemon.info dnsmasq[2798]: read /tmp/hosts/dhcp.cfg01411c - 1 addresses
Wed Mar 23 17:08:55 2022 daemon.info dnsmasq-dhcp[2798]: read /etc/ethers - 0 addresses
Wed Mar 23 17:09:08 2022 daemon.warn pppd[11164]: Timeout waiting for PADO packets
Wed Mar 23 17:09:08 2022 daemon.err pppd[11164]: Unable to complete PPPoE Discovery

I understand that A7 is unable to reach BSNL authentication server, but unable to pin point the error in config. Also have tried MTU-1460 in A7, it gives the same error.

 

[sloj]

I haven't used OpenWRT setup but looks like you have wrong VLAN port on your PPPoE config. Shouldn't it be 191 instead of 2?

 

[ka2107]

In addition to what @sloj said, you also need to "untag" the wan port. The ONT (Netlink HG323RGW in my case), even in bridge mode, removes the tagging and sends untagged packets to the bridged device.

 

[tyrannosaurhex]

Thanks @sloj , that was the problem. @ka2107 I tried doing what you mentioned, and it had the reverse effect. Keeping WAN as tagged seems to work for me. Curious, since you're too using A7 are u using NextDNS by any chance. The NextDNS package for OpenWRT stops working after a while. Using stubby causes problems of its own.

 

[ka2107]

I am using NextDNS but not through the router.

I am directly using the NextDNS DNS-over-TLS address in my Android Phone (using the "Private DNS" option), NextDNS app in Windows 10 and DNS-over-HTTPS address in all the web browsers (Chrome, Firefox, Edge) in both Windows 10 and Android.