Since updating my EdgeRouter-X (ER-X) from 23.05 to 24.10.2 and now to 24.10.3 I notice the following log messages where I have no idea where they are from.
Wed Sep 24 20:38:06 2025 kern.info kernel: [ 1159.161490] br-lan.1: left allmulticast mode
Wed Sep 24 20:38:06 2025 kern.info kernel: [ 1159.170058] br-lan: left allmulticast mode
Wed Sep 24 20:38:06 2025 kern.info kernel: [ 1159.311123] br-lan.1: entered allmulticast mode
Wed Sep 24 20:38:06 2025 kern.info kernel: [ 1159.320244] br-lan: entered allmulticast mode
Wed Sep 24 20:38:06 2025 kern.info kernel: [ 1159.332172] mtk_soc_eth 1e100000.ethernet eth0: left allmulticast mode
Wed Sep 24 20:38:06 2025 kern.info kernel: [ 1159.520968] mtk_soc_eth 1e100000.ethernet eth0: entered allmulticast mode
Wed Sep 24 20:40:32 2025 kern.info kernel: [ 1305.506934] br-lan.1: left allmulticast mode
Wed Sep 24 20:40:32 2025 kern.info kernel: [ 1305.515581] br-lan: left allmulticast mode
Wed Sep 24 20:40:32 2025 kern.info kernel: [ 1305.629290] br-lan.1: entered allmulticast mode
Wed Sep 24 20:40:32 2025 kern.info kernel: [ 1305.638368] br-lan: entered allmulticast mode
Wed Sep 24 20:40:32 2025 kern.info kernel: [ 1305.647885] mtk_soc_eth 1e100000.ethernet eth0: left allmulticast mode
Wed Sep 24 20:40:32 2025 kern.info kernel: [ 1305.798924] mtk_soc_eth 1e100000.ethernet eth0: entered allmulticast mode
Wed Sep 24 20:42:51 2025 kern.info kernel: [ 1444.247353] br-lan.1: left allmulticast mode
Wed Sep 24 20:42:51 2025 kern.info kernel: [ 1444.255910] br-lan: left allmulticast mode
Wed Sep 24 20:42:51 2025 kern.info kernel: [ 1444.366516] br-lan.1: entered allmulticast mode
Wed Sep 24 20:42:51 2025 kern.info kernel: [ 1444.375600] br-lan: entered allmulticast mode
Wed Sep 24 20:42:51 2025 kern.info kernel: [ 1444.385255] mtk_soc_eth 1e100000.ethernet eth0: left allmulticast mode
Wed Sep 24 20:42:51 2025 kern.info kernel: [ 1444.556297] mtk_soc_eth 1e100000.ethernet eth0: entered allmulticast mode
Wed Sep 24 20:44:38 2025 kern.info kernel: [ 1551.721299] br-lan.1: left allmulticast mode
Wed Sep 24 20:44:38 2025 kern.info kernel: [ 1551.730026] br-lan: left allmulticast mode
Wed Sep 24 20:44:38 2025 kern.info kernel: [ 1551.904630] br-lan.1: entered allmulticast mode
Wed Sep 24 20:44:38 2025 kern.info kernel: [ 1551.913702] br-lan: entered allmulticast mode
Wed Sep 24 20:44:38 2025 kern.info kernel: [ 1551.923263] mtk_soc_eth 1e100000.ethernet eth0: left allmulticast mode
Wed Sep 24 20:44:39 2025 kern.info kernel: [ 1552.084332] mtk_soc_eth 1e100000.ethernet eth0: entered allmulticast mode
I am aware of that EEE issue on the MT7621 (https://github.com/openwrt/openwrt/issues/17351), but that is resolved since 24.10.2 so should not be related.
I also found another thread ( Repeated logs for entered/left allmulticast mode - #10 by nicolas314 ) where they just installed and configured igmpproxy (but I’m not aware of using multicast at all in my network).
Any ideas?