OPNsense Forum
Archive => 20.1 Legacy Series => Topic started by: 5SpeedFun on June 08, 2020, 02:03:56 am
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Hi guys,
I have a Cisco 3750 with iOS15 with igmp snooping & querier on. When I start/re-start the miniupnpd, a tcpdump shows it send to 239.255.255.250 but the switch never sees a join to the group. When I start my PS3/XB1X, I see it join the 239.255.255.250 multicast group, but since the opnsense box w/ miniupnp isn't a member of the group it never gets the requests from the consoles to open ports & everything doesn't work.
Obviously if you have a dumb switch (that doesn't support IGMP snooping/querier) then everything "just works" (since multicast is flooded).
I was able to manually fixing this by creating a static join on the 3750 for the opnsense box to 239.255.255.250.
Anyone else seen this problem?