Mocomtech CRS-300 operation manual Ethernet Data Connection Wired-around Method Sub-Mux

CRS-300 1:10 Redundancy Switch	Revision 16
Cables and Connections	MN/CRS300.IOM

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1.Where the traffic data type is Ethernet, the User can only use one of four Ethernet ports, in Ethernet Bridge Mode, on the CDM-625 rear panel.

2.The CRS-316 can be used for single-port Ethernet Bridge Mode or EIA-530,

but not both at the same time. The CRS-316 does not handle Sub-Mux operation (where the CDM-625 may use both Ethernet Bridge Mode and EIA-530 simultaneously). Sub-Mux operation is explained in the next section, Sect. 4.5.3.8.2 Ethernet Data Connection – Wired-around Method (Sub-Mux).

3.The CRS-336 can be used for single-port Ethernet Bridge Mode or HSSI, but not both at the same time. The CRS-336 does not handle Sub-Mux operation (where the CDM-625 may use both Ethernet Bridge Mode and EIA-530 simultaneously). Sub-Mux operation is explained in the next section, Sect. 4.5.3.8.2 Ethernet Data Connection – Wired-around Method (Sub-Mux).

4.5.3.8.2Ethernet Data Connection – Wired-around Method (Sub-Mux)

IMPORTANT

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

Sub-Mux is a secondary framing structure which combines one to four ports of 10/100 Ethernet (IP) traffic with any currently available combination of framing and interface type (i.e. HSSI, EIA-422, ASI or G.703, but excluding IP itself). The composite data rate to the modulator and from the demodulator is referenced to the primary, non-IP data interface rate by a specific ratio selected by the user.

For more information about Sub-Mux, refer to Chapter 15. IP SUB-MUXin the CDM-625 Advanced Satellite Modem Installation and Operation manual.

Where the CDM-625 Sub-Mux mode will be used, the wired-aroundEthernet connection is used with the CDM-625 modem and CRS-300. With Ethernet Bridge Mode configured for the wired- around method, this gives full redundancy capability to both selected data types in Sub-Mux mode. However, care must be taken to ensure there are no Ethernet network loops or connection problems – this method should only be used if the CDM-625 will be using the Sub-Mux.In general, the wired-around approach can be used in a hub-to-remotes configuration.

Figure 4-13depicts the cabling example for a 1:N Redundant system with Traffic modems 3 and 9 configured for IP Sub-Mux. When IP Sub-Mux is utilized with any other traffic data type, observe the following:

•First, connect and secure the Control/Data Cable CA/WR0066 (for control/data purposes) between the Redundant CDM-625 and the RMI (see Sect. 4.5.3.1).

•Next, connect and secure the desired serial traffic data cables as described in Sects. 4.4.3.2 through 4.5.3.5.

•Then, for each CDM-625 using Sub-Mux, connect a user-provided Cat5 Ethernet data cable from any one of the four 10/100 Ethernet Bridge Mode ports on the CDM-625 to one port of a user-provided 10/100/1000 Layer 2 Ethernet Switch.

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