Comtech EF Data CRS-170A User Manual

Page 30

CRS-170A L-Band 1:1 Redundancy Switch

MN/CRS170A.IOM

Introduction

Revision 13

1–10

For CDM-625/A modems: You may configure one of the CDM-625/A’s four available 10/100

Ethernet ports for M&C Ethernet. As configured in Dedicated Management Port Mode,

when the modem is offline the M&C-designated port remains functional and available for

operation, while the three remaining ports are unavailable. Otherwise, if none of the 10/100

Ethernet ports are reserved for M&C operation; all four ports become unavailable when the

modem is offline.

This configuration must be enabled on both modems.

See the CDM-625 or CDM-625A Advanced Satellite Modem Installation and Operation

Manual for instructions to configure one of the four 10/100 Ethernet ports for each modem

for remote Ethernet M&C.

Dedicated Management Port Mode is not configurable for use when the

optional IP Packet Processor is installed and enabled. With the IP Packet

Processor enabled, as a means to avoid Ethernet Networking Loops, only one of

the CDM-625/A’s four 10/100 Ethernet Ports is used for each modem at any

given time.

For CDM-760, -750, -710GL, -710, or -700 modems: When the modem is offline, although all

GigE port(s) are unavailable, the M&C Ethernet port remains functional and available for

operation.

Installation must use a true switching device, not a hub device.

1.3.2.2 CDM-625/A (with Optional IP Packet Processor) – Router Mode

All configuration changes can only be made to the Online unit and will require you to

“Save Parameters to permanent storage” to ensure the configuration change is also

applied to the Backup Modem.

For the CDM-625/A with the optional IP Packet Processor installed and enabled and the

configuration set for Router Mode, you need to provide an external Ethernet switch.

In Router Mode, both modems must be assigned a unique Management IP address on the same

subnet (172.18.10.21/24 and 172.18.10.22/24 as shown in Figure 1-6 and Figure 1-7). This is

used to share the parameters file. A Traffic IP address on the subnet must also be assigned

(172.18.10.20/24) in the Online unit.

The Traffic IP Address must be different from either Management IP Address.

Whichever modem is Online will assume the Traffic IP. When there is a switchover to the backup

modem, this modem will now assume the Traffic IP.