PPPoE drops

Hi,

I currently use Zen FTTC on a Huawei HG612B modem connected to Fritzbox 7530 running OpenWRT. This has been fine up until now, but the last few days I get several PPPoE drops per day. These only last a few seconds and the modem isn't re-syncing or anything.

Is this likely to be a problem with my setup or elsewhere?

OpenWRT logs say:
Wed Feb 2 07:44:10 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is down
Wed Feb 2 07:44:11 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is up
Wed Feb 2 09:47:49 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is down
Wed Feb 2 09:47:50 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is up
Wed Feb 2 10:33:36 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is down
Wed Feb 2 10:33:37 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is up
Wed Feb 2 11:43:15 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is down
Wed Feb 2 11:43:19 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is up
Wed Feb 2 12:25:35 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is down
Wed Feb 2 12:25:39 2022 daemon.notice netifd: Network device 'pppoe-WAN' link is up

If these were re-syncs it would be down for a minute, and the modem has not re-synced at all anyway, I checked that too in its status.

I subsequently noticed this before each drop

"No response to 5 echo-requests"

I've doubled the LCP echo interval from 5 seconds to 10 seconds to make it more tolerant. Been OK for 5 hours.

No issues here with PPPoE drop out's here
Check Zen status https://status.zen.co.uk/broadband and also double check the ethernet cable isn't loose on both ends.