Multicast between Cisco and Fortigate

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Hi, I’m trying to get Multicast between a Layer 3 Cisco switch that has Dense-Sparce mode turned on with its VLANS, and a fortigate that has Dense-mode turned on, to work. If I hook a computer directly up to the Cisco switch, it can join multicast groups, but if I hook up the Fortigate to it, the Fortigate does not see any PIM neighbors. The Subnets and IPs are correct, and if I switch the Cisco out for another Fortigate, PIM works. Anyone else experience anything like this? It almost seems like PIM is turned off on the Cisco but IGMP is working..

[emnoc]

Do you have a topo of your layout? To confirm neighborship " show ip pim neigh" & " show ip pim int " on a cisco would easily identify if the FGT is enabled with pim and what version.

It almost seems like PIM is turned off on the Cisco but IGMP is working..

I highly doubt a cisco router will have igmp enable on a interface without pim. Newer iso code, does allow the disabling of ip pim on a interface tho, but once again, those 2 above commands will shed more light on the mcast issues.

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Ok ill have the admin of the Cisco box try that. But I' m guessing he will run it, and it will show no neighbors but PIM will be turned on. as for the Topology the fortinet on a /29 subnet at .62 and the cisco switch gateway is .57 If that happens what would be the next step to take?

[emnoc]

The next steps; Is pim enabled on the fortigate & interfaces Can you conduct a mtrace from the sender to the source Do you have the appropiate fwpolicies-mcast in place Have you conducted any debug diag ( could have done to validate pim btw 224.0.0.13 ) and look at the intervals/hellos and queries ( igmp ) Does the router has the correct entries ( static/dynamic or mrouted ) Does the sender/receiver have the correct TTL and no ttl-boundaries what does both the cisco and fgt shows for mcast route table if any e.g show ip mroute get router info multicast pim Bottom line, we can' t do the work for you on he information you posted.