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ViPR User Manual
50
Note:
Occasionally, the unit cannot determine that the packet is actually a directed broadcast. In such a
case, the packet is normally routed.
LIMITED BROADCAST
The “
Limited Broadcast
” radio buttons let the user select whether the unit must forward or not
limited
broadcast
packets. Upon reception of a
limited broadcast
packet, the unit takes the following actions:
•
Keep a copy for itself (pass to internal applications, if any).
•
If
limited broadcast
packets can be forwarded:
Sends a copy of the packet out of all the interfaces at the exception of the interface where the packet
was received.
•
If
limited broadcast
packets cannot be forwarded:
Silently discards the packet.
4.8.3.4.1.2 Multicast
In an ViPR environment, an outside host (Sender) might be interested in sending multicast packets to any
one of the following groups:
•
“All Remote ViPR” group.
•
Various “Remote Host” group.
The main ViPR unit is directly connected to the outside network. ALL multicast groups MUST be identi-
fied in the main ViPR unit because it uses IGMP to register the memberships to the multicast groups on
behalf of the other units and Hosts (Remote ViPR units, Remote Hosts).
Figure 39 - Typical ViPR Multicast Groups
Sender
Network
“All Remote ViPR”
group
RF Airlinks
Remote Host Remote Host
Remote Host
Remote Host Remote Host
“Remote Host”
group 1
“Remote Host”
group 2
Remote 1
Remote 2
Remote 3
Remote 4
Remote 5
Master ViPR unit
