Comtech EF Data CRS-300 - Manual (Page 240)

CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix A Revision 19
A–8
A.3.6 Hub-to-Remotes with Standard Traffic using Routers or Switches
Figure A-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 A-7. Hub-to-Remotes With Standard Traffic Using Routers or Switches
A wired-thru Ethernet redundancy example is shown in Figure A-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 A-9.
When the CRS-300 1:10 Redundancy Switch backs up a faulted Traffic Modem, the Switch 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.