281Advanced IP Protocol Features
(e.g., any address in the range 224.0.0.0/4). The multicast demand trafc rate is speci-
ed via the attributes Trafc (bits/second) and Trafc (packets/second). You may
also want to set the value of the attribute Trafc Start Time, which controls the time
when the demand starts generating trafc. By default, this attribute is set to Same
As Global Setting (i.e., the value dened via the global attribute Trafc…
Background Trafc Start Delay (seconds) in the Cong/Run DES window).
Notice that if the destination nodes join the multicast group after the demand starts
trafc transmission, then all the packets sent prior to the destinations joining the
multicast group will be discarded. Typically, you can easily i ...