bon à retenir sinon pour tcmdump j'ai tenté du bridge0 :
[2.1.3-RELEASE][root@pfsense.localdomain]/root(13): tcpdump -i bridge0
tcpdump: WARNING: bridge0: no IPv4 address assigned
tcpdump: verbose output suppressed, use -v or -vv for full protocol decode
listening on bridge0, link-type EN10MB (Ethernet), capture size 96 bytes
22:23:40.052252 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:23:56.752596 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:24:13.352909 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:24:30.053221 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:24:46.753582 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:25:03.353846 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:25:20.054170 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:25:36.754508 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:25:53.354801 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:26:10.055100 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:26:26.755429 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:26:43.355702 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:27:00.056000 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:27:16.756325 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
22:27:33.356625 IP 172.27.156.58 > all-systems.mcast.net: igmp query v2
^C
15 packets captured
15 packets received by filter
0 packets dropped by kernel
je vais tenté avec " tcpdump -i bridge0 -vv"
pendant un reboot de décodeur TV voir si j'ai plus d'infos qui sortent je repasse poster le log après s'il est plus complet...