mrouted doesn't allow routing same group from 2 origins

[lucdig]

Hi, I have this /etc/mrouted.conf:

no phyint
phyint tun0 enable static-group 239.13.13.0
phyint tun1 enable static-group 239.13.13.0

1. When a packet originated from tun0 (10.13.13.10) is sent to 239.13.13.0, it is routed to tun1.
2. But, when a packet from tun1 (10.13.13.11) is sent to 239.13.13.0, it is not routed to tun0.

and viceversa.

2. works after 2-3 minutes, maybe when a cache's timer expires.

after 1) I see:

Multicast Forwarding Cache Table
Origin          Group           Inbound       <>    Uptime   Expire  Outbound
10.13.13.10/30   239.13.13.0     tun0               0:08:26  0:02:28   tun1
10.13.13.11/30   239.13.13.0     tun1               0:10:57  0:02:09   tun0

Source          Group           Inbound             Uptime  Packets     Bytes
10.13.13.10      239.13.13.0     tun0               0:00:49

I'm running mrouted on OpenBSD 7.5

Thanks for any help

[lucdig]

Ruuning mrouted at foreground, I see this after a few time, don't know what it could mean:

mrouted: 13:27:36.471 warning - Failed reading (S,G) count for (10.13.13.11,239.13.13.0): Invalid argument

[troglobit]

OpenBSD has their own in-tree version of mrouted, is that what you are using?

[lucdig]

I downloaded and compiled the 4.5 version, I'm not using the in-tree version

[troglobit]

OK. It's probably best if you use a native OpenBSD service for your needs since I've not tested my fork on the BSDs for many years now.