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CDM-700 High Speed Satellite Modem
Ethernet Network Configurations
14.3.2
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-thru or
wired-around configuration.
14.3.2.1
Wired-thru Connection
This redundancy approach is the recommended and preferred
connection method.
IMPORTANT
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.
14.3.2.2
Wired-around Connection
This redundancy approach is not recommended.
IMPORTANT
The wired-around Ethernet connection is used with the CDM-700 modem and CRS-300 1:10
Redundancy Switch, 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.
14–3
Revision 5
MN/CDM700.IOM
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