Comtech EF Data CDM-600 Especificações descarregar pdf (Página 25)

CRS-170A L-Band 1:1 Redundancy Switch Revision 3

Introduction MN/CRS170A.IOM

1.2.1.1 IP Data 1:1 Switching Functional Description

A standard Ethernet Layer 2 Switch (provided by User) is needed when a CDM-625/570L/700/710

modem is configured for Ethernet terrestrial traffic.

Figure 1-4. IP 1:1 Redundancy

For IP 1:1 redundancy operation, both modems are assigned a unique M&C IP address on the

same subnet (in the diagram above, 172,18.10.21/24 and 172.18.10.22/24). A Traffic IP address

on the subnet is also assigned (172.18.10.20/24). Whichever modem is online, it will also assume

the Traffic IP.

When there is a switchover to the backup modem, this modem will now assume the Traffic IP. It

will also broadcast a “gratuitous ARP” which will tell all local devices to now associate a new

MAC address for the Traffic IP 172.18.10.20. Each device will update their ARP tables and

traffic will resume virtually instantaneously.

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Comtech EF Data CDM-600 Especificações Página 25