it is a period that I have some problem with PIM of my Firewall Fortigate 600D and wish to share this post if someone else has had the same experience.
I have a network of seven firewall connected by LAN. All node are PIM dense mode enabled. When I change the configuration to one of these, at beginning, after booting, some of multicast between the firewall updated and the other firewalls are missing. Everything is ok in term of client join , IGMP , policy etc. What I do to let it to run is simply disable /enable, in the dashboard, the multicast routing. After this all run perfectly. It seems as the boot is not enough to restore a right situation or disabling enabling multicast routing probably reset some ethernet ports. In the multicast forwarding mode instead I have never had this problem. Do you know some tricks that can add to the configuration to avoid this problem? Could it be a bag?
thanks in advance for your support