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jholloway2680Flag for United States of America

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Watchguard Firewall and Multicast

I am trying to pass multicast traffic between 2 VLANs that are connected by a Watchguard firewall.  No matter what I do, I cannot see and multicast traffic on the "traffic monitor;" on the Watchguard.  I am using a Cisco 2960 with IGMP turned on.  I can stream to everyone in the same VLAN , just not to second VLAN (via watchguard).   Any ideas?
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Steve
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Multicast is not normally routed between subnets as that's exactly the kind of traffic you are trying to block by separating into two subnets/VLANs.
You may need to configure an IP helper configuring as this monitors VLAN 1 and drops the appropriate packets onto VLAN 2 if your watchguard can do it.
Also worth considering the device doing the multicasting. its often easier to add another nic onto VLAN2 so it can multicast freely without having to go via the router.
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