Multicast in VLAN across multiple Fortiswitches

[116820]

Hello,

we have set up a VLAN for "spectralink dect base-stations" here.
The base stations are connected to several Fortis switches.
Here there seems to be a problem with multicast, the devices can not sync across multiple switches. (on the same switch it works).

What must be set up in the Fortigate so that the multicast works across switches?

The manufacturer gives the following information:
https://support.spectralink.com/sites/default/files/resource_files/Synchronization%20and%20Deploymen...

There are two possible solutions to this:
l Give the highest priority to a custom IP priority and configure the server to apply this IP priority
to PTPv2 traffic.
l Give the highest priority to multicast UDP packets on port 319 with the destination address
224.0.1.129 (IPv4) or FF02::181 (IPv6).

Thanks for help!

[gfleming]

What model FortiSwitch and FortiGate? What OS versions?

This might be a good start to read over? https://docs.fortinet.com/document/fortiswitch/7.2.4/fortilink-guide/173274/configuring-igmp-snoopin...

[116820]

Thanks for reply,

Foritgate 500e with v7.0.9 b0444 and several FortiSwitch 448D with v6.2.4.

(managed over 500e)

In this case?

config system interface
 edit vlan100
  set switch-controller-igmp-snooping enable
  set switch-controller-igmp-snooping-proxy enable
 next
end

• Is the setting for the VLAN alone sufficient, or must a global setting also be made?
• Does a proxy need to be set?

[gfleming]

I'm pretty sure you need to follow all of those configuration options as outlined in the IGMP doc. Please try at least. And then check if you see your groups showing up under:

diagnose switch-controller switch-info igmp-snooping group <SWITCH_ID>

diagnose switch-controller switch-info igmp-snooping status <SWITCH_ID>