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BreezeMAX Modular Base Station System Manual 197
wireless link devices. If disabled, these packets are not sent to the wireless link
even if they are intended for devices on the wireless link.
4.10.4.5.4 Broadcast Relaying (L2 and Voice Service Type)
The Broadcast Relaying parameter determines whether the AU performs
broadcast relaying. When the Broadcast Relaying parameter is enabled, broadcast
packets originating from devices on the wireless link are transmitted by the AU
back to the wireless link devices, as well as to the backbone. If disabled, these
packets are sent only to the backbone and are not sent back to the wireless link.
4.10.4.5.5 Unknown Forwarding Policy (L2 and Voice Services Type)
The Unknown Forwarding Policy parameter determines the mode of controlling
the flow of information from the backbone to the wireless media. Select from the
following options:
1 - Reject: The AU will transmit unicast packets only to those addresses that the
AU knows to exist on the wireless link side.
2 - Forward: Enables the transmission of all packets, except unicast packets sent
to addresses that the AU recognizes as being on its wired backbone side.
4.10.4.5.6 Multicast VLAN ID
The Multicast VLAN ID parameter is applicable only to Services assigned to SUs
with SW version below 2.0. The Multicast VLAN ID is the VLAN ID to be attached
to mulicast messages in order to enable full support of the VLAN feature by SUs
with SW version below 2.0.
In SUs with SW version below 2.0, it was necessary to use behind the SU a VLAN
switch with binding capability to support multiple VLAN IDs. The VLAN switch
was responsible for duplicating all the packets to the correct ports according to
the multicast connection, this required switch pre-configuration. If a VLAN switch
with binding capability was not used, only a single VLAN ID behind the SU could
be supported, and this VLAN ID has to be identical to the multicast VLAN ID.
In the current version, all packets received from the wireless port over a multicast
connection are transmitted by the SU several times to the Ethernet port, each
time with a different VLAN ID, taken from the VLAN ID list supplied by the NPU.
Available values are in the range of 0 to 4094 or null (empty string) for No
Multicast VLAN ID.
Refer to Section 4.10.1.6 for guidelines regarding configuration of Multicast VLAN
ID.