CRS-300 1:10 Redundancy Switch MN/CRS300.IOM
Appendix A Revision 19
A–6
A.3.5 Hub-to-Hub with Standard Traffic using Switches
When connecting two or more “hub-sites” where there are multi-paths between each site, care
must be taken to ensure no network loops occur. Figure A-5 depicts two hub-sites connected with
two or more modems where all the traffic being transmitted and received is on the same
LAN/VLAN.
Figure A-6 shows a simplified version of the Networking Loop. Since there is no router in the
network and all the traffic is destined to the same network, routing loops have been created.
As illustrated, two switches have been connected, each with two or more separate connections.
This is not how the Ethernet switches were designed to be used, and this configuration will
cause a network outage.
Figure A-5. Networking Loop Example
Figure A-6. Networking Loop Example (Simplified)
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