Mocomtech Ethernet Redundancy with CRS-300, Wired-thru Connection, Wired-around Connection

CRS-300 1:10 Redundancy Switch	Revision 16
Ethernet Network Configurations	MN/CRS300.IOM

3.3.2 Ethernet Redundancy with CRS-300

After the customer has determined the best configuration for near-to-far end Ethernet networks, the CRS-300 1:10 Redundancy Switch may now be added to one or both ends of the link(s). Ethernet redundancy using the CRS-300 can be accomplished using a wired-thruor wired-aroundconfiguration.

3.3.2.1Wired-thru Connection

IMPORTANT

This redundancy approach is the recommended and preferred connection method.

The wired-thru Ethernet connection on the CRS-300 is the easiest and simplest choice for Ethernet redundancy. This connection method – the same as used on the standard serial data interface – provides a single connection for the User Data Interface and provides simple form-C relays that route the Ethernet connection from the User connection to either the Traffic or Redundant Modem.

3.3.2.2Wired-around Connection

While this redundancy approach is not recommended, it can be used after study of the LAN and WAN sides of the IP networks.

IMPORTANT

The wired-around Ethernet connection is used with the CRS-300 and the CDM-700 modem where both modem data interface slots are needed; e.g., where one slot is HSSI or G.703 and the other slot is GigE. With the Ethernet slot configured for the wired-around method, this gives full redundancy capability to both data slots. However, care must be taken to ensure there are no Ethernet network loops or connection problems – this method should only be used if both modem data slots are used. In general, the wired-around approach can be used in a hub-to-remotes configuration with standard traffic.

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