User manual

120 20131-301 Gemini G3 - User Manual
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Example (Directed Broadcast forwarding disabled)
Figure 34 - Example of Directed broadcast forwarding disabled
In this example (Figure 34), directed broadcast forwarding is enabled on the Base unit and disabled
on the Mobile (1) unit. If Sender sends a packet to destination address 172.30.1.255, the packet
would be discarded by
Mobile (1), it would not reach Mobile Host (1), Mobile Host (2) and Mobile
Host (3).
If the user wants the Base unit to do the discarding of the directed broadcast packets, then the directed
broadcast forwarding must be disabled on the Base unit itself.
4.7.3.6.1.1.2 Limited Broadcast
The “Limited Broadcast” enabled/disabled option buttons control limited broadcast packets forward-
ing. When enabled, the unit forwards lim
ited broadcast packets.
Upon reception of a limited broadcast packet, the unit takes the following actions:
• Keeps a copy
for itself (passes to internal applications, if any).
• If limited broadcast packets can be forwarded (Limited Broadcast is enabled):
Sends a copy of the packet out to all the interfaces with the exception of the interface where the
packet was received.
• If limited broadcast packets cannot be forwarded (Limited Broadcast is disabled):
Silently discards the packet.
Sender
Base
(
P3
)
Mobile (1)
172.30.1.1/24
Mobile (2)
172.30.3.1/24
10.0.0.1/8
10.0.0.2/8
10.0.0.4/8
Directed broadcast forward-
in
g
enabled
Directed broadcast forward-
in
g
disabled
Send to 172.30.1.255