Wireless Access Point
326 Configuring the Wireless AP
• In Multicast VLAN Forwarding, enter a list of VLANs that
participate in the multicast forwarding.
• In MDNS Filter, specify the mDNS service types that are allowed to
be forwarded.
• If you leave this field blank, then there is no filter, and mDNS
packets for all service types are passed.
• If you enter service types, then this acts as an allow filter, and
mDNS packets are passed only for the listed service types.
Note that mDNS filtering may be used to filter the mDNS packet
types that are forwarded within the same VLAN. Also, in conjunction
with multicast forwarding, it may be used to filter the mDNS packet
types that are forwarded across configured VLANs.
After you have entered these settings, when multicast packets arrive from
the wired network from one of the Multicast Forwarding Addresses on
any VLAN specified in Multicast VLAN Forwarding, they are forwarded
to the corresponding wireless SSID for that VLAN.
Multicast packets coming in from the wireless network on an SSID tied to
one of the specified VLANs and matching one of the Multicast
Forwarding Addresses are forwarded to the specified VLANs on the
wired network.
No modifications are made to the forwarded packets – they are just
forwarded between specified VLANs and associated SSIDs.
To specify Multicast Forwarding Addresses: enter each IP address in the
top field and click the Add button to its right. You may only enter IPv4
Xirrus strongly recommends the use of MDNS Filters (Step 24) when using
multicast forwarding. Only allow required services to be forwarded.
Carefully monitor results, as forwarding may flood your network with
multicast traffic. Experience has shown Bonjour devices to be very chatty.
Also note that since this is link local multicast traffic, it will be sent to every
wired port in the VLAN, as IGMP snooping does not work with link local
multicast addresses.
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