How do I allow broadcast packets over vpn?

ozarktech
ozarktech Posts: 9  Freshman Member
First Comment
edited April 2021 in Security
We have 2 sites connected by vpn, with an Allworx pbx at the main location. Paging works by broadcast packets, but they do not broadcast over the vpn. The phones are connected through the vpn. The location with PBX has a zywall 110 and the new location has the new VPN 100 series. How do I setup routers so they can page phones across the VPN?

All Replies

  • ozarktech
    ozarktech Posts: 9  Freshman Member
    First Comment
    Update. The allworx uses multicast, not broadcast for paging.
  • Zyxel_Stanley
    Zyxel_Stanley Posts: 1,366  Zyxel Employee
    First Anniversary 10 Comments Friend Collector First Answer

    Hi @ozarktech

    The VTI interface is able to forward multicast traffic in VPN tunnel. (VIT interface must use site to site VPN)

    (1)   In VPN connection, must select “VPN Tunnel Interface”


    (2)   Go to Configuration > Network > Interface > VTI > Click add VTI interface.


    It has support for IGMP(multicast) function.

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