Comtech EF Data CDM-700 - Manual (Page 200)

CDM-700 High Speed Satellite Modem Revision 5
Ethernet Network Configurations MN/CDM700.IOM
14.3.5 Hub-to-Remotes with Standard Traffic using Routers or Switches
Figure 14-7 shows hub-to-remotes configuration with standard Ethernet traffic using routers or
switches. The routers/switches will block broadcasts coming from the hub and remote networks.
Therefore, no broadcast storm can be created or the possibility of having a remote MAC on the
Hub networks.
Figure 14-7. Hub-to-Remotes with Standard Traffic using Routers or Switches
A wired-thru Ethernet redundancy example is shown in Figure 14-8. When the CRS-300 1:10
Redundancy Switch backs-up a faulted Traffic Modem, the physical port, (on the router) does not
change because the Ethernet connection is properly rerouted within the CRS-300 from the Traffic
Modem to the Redundant Modem.
A wired-around Ethernet redundancy example for the CDM-700 User is shown Figure 14-9.
When the CRS-300 1:10 Redundancy Switch backs-up a faulted Traffic Modem, the Dwitch
will learn the new MAC address of the redundant unit and traffic will be passed again. This
type of architecture will slow down the switching time, because the Switch will need to re-learn
the correct port connection.
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