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Adding Layer 3 IP Policies
EncrypTight User Guide 199
Adding a Multicast Policy
In a multicast network, one or more networks send unidirectional streams to multiple destination
networks. The multicast routers detect the multicast transmission, determine which nodes have joined the
multicast network as destination networks and duplicate the packet as needed to reach all multicast
destination networks.
Figure 76 Multicast network example
The policy for the example in Figure 76 specifies Network A as the send network. This policy also
specifies networks B and C as the destination or receive networks. Networks B and C are set up in the
multicast routers as members of the multicast network. PEP 1 encrypts multicast traffic sent from
Network A to the multicast IP address. PEPs 2 and 3 decrypt data received at Network B and C that
originates from the multicast network IP address.
When you create a multicast policy, you must select a ETKMS and specify a multicast network IP
address. At least one network set must be selected as either send only or send and receive, and at least
one network set must be selected as either receive only or send and receive.